From a415c29efee45520ae252d2aa28f1083a521cd7b Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 09:56:49 +0200
Subject: Adding upstream version 6.4.3+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 wp-includes/Requests/library/Requests.php          |   12 +
 wp-includes/Requests/src/Auth.php                  |   36 +
 wp-includes/Requests/src/Auth/Basic.php            |  103 ++
 wp-includes/Requests/src/Autoload.php              |  187 ++++
 wp-includes/Requests/src/Capability.php            |   36 +
 wp-includes/Requests/src/Cookie.php                |  527 +++++++++
 wp-includes/Requests/src/Cookie/Jar.php            |  187 ++++
 wp-includes/Requests/src/Exception.php             |   66 ++
 .../Requests/src/Exception/ArgumentCount.php       |   47 +
 wp-includes/Requests/src/Exception/Http.php        |   78 ++
 .../Requests/src/Exception/Http/Status304.php      |   31 +
 .../Requests/src/Exception/Http/Status305.php      |   31 +
 .../Requests/src/Exception/Http/Status306.php      |   31 +
 .../Requests/src/Exception/Http/Status400.php      |   31 +
 .../Requests/src/Exception/Http/Status401.php      |   31 +
 .../Requests/src/Exception/Http/Status402.php      |   31 +
 .../Requests/src/Exception/Http/Status403.php      |   31 +
 .../Requests/src/Exception/Http/Status404.php      |   31 +
 .../Requests/src/Exception/Http/Status405.php      |   31 +
 .../Requests/src/Exception/Http/Status406.php      |   31 +
 .../Requests/src/Exception/Http/Status407.php      |   31 +
 .../Requests/src/Exception/Http/Status408.php      |   31 +
 .../Requests/src/Exception/Http/Status409.php      |   31 +
 .../Requests/src/Exception/Http/Status410.php      |   31 +
 .../Requests/src/Exception/Http/Status411.php      |   31 +
 .../Requests/src/Exception/Http/Status412.php      |   31 +
 .../Requests/src/Exception/Http/Status413.php      |   31 +
 .../Requests/src/Exception/Http/Status414.php      |   31 +
 .../Requests/src/Exception/Http/Status415.php      |   31 +
 .../Requests/src/Exception/Http/Status416.php      |   31 +
 .../Requests/src/Exception/Http/Status417.php      |   31 +
 .../Requests/src/Exception/Http/Status418.php      |   35 +
 .../Requests/src/Exception/Http/Status428.php      |   35 +
 .../Requests/src/Exception/Http/Status429.php      |   35 +
 .../Requests/src/Exception/Http/Status431.php      |   35 +
 .../Requests/src/Exception/Http/Status500.php      |   31 +
 .../Requests/src/Exception/Http/Status501.php      |   31 +
 .../Requests/src/Exception/Http/Status502.php      |   31 +
 .../Requests/src/Exception/Http/Status503.php      |   31 +
 .../Requests/src/Exception/Http/Status504.php      |   31 +
 .../Requests/src/Exception/Http/Status505.php      |   31 +
 .../Requests/src/Exception/Http/Status511.php      |   35 +
 .../Requests/src/Exception/Http/StatusUnknown.php  |   49 +
 .../Requests/src/Exception/InvalidArgument.php     |   41 +
 wp-includes/Requests/src/Exception/Transport.php   |   17 +
 .../Requests/src/Exception/Transport/Curl.php      |   80 ++
 wp-includes/Requests/src/HookManager.php           |   33 +
 wp-includes/Requests/src/Hooks.php                 |  103 ++
 wp-includes/Requests/src/IdnaEncoder.php           |  412 ++++++++
 wp-includes/Requests/src/Ipv6.php                  |  203 ++++
 wp-includes/Requests/src/Iri.php                   | 1116 ++++++++++++++++++++
 wp-includes/Requests/src/Port.php                  |   75 ++
 wp-includes/Requests/src/Proxy.php                 |   38 +
 wp-includes/Requests/src/Proxy/Http.php            |  164 +++
 wp-includes/Requests/src/Requests.php              | 1099 +++++++++++++++++++
 wp-includes/Requests/src/Response.php              |  165 +++
 wp-includes/Requests/src/Response/Headers.php      |  127 +++
 wp-includes/Requests/src/Session.php               |  308 ++++++
 wp-includes/Requests/src/Ssl.php                   |  182 ++++
 wp-includes/Requests/src/Transport.php             |   45 +
 wp-includes/Requests/src/Transport/Curl.php        |  640 +++++++++++
 wp-includes/Requests/src/Transport/Fsockopen.php   |  510 +++++++++
 .../src/Utility/CaseInsensitiveDictionary.php      |  127 +++
 .../Requests/src/Utility/FilteredIterator.php      |   97 ++
 .../Requests/src/Utility/InputValidator.php        |  109 ++
 65 files changed, 8031 insertions(+)
 create mode 100644 wp-includes/Requests/library/Requests.php
 create mode 100644 wp-includes/Requests/src/Auth.php
 create mode 100644 wp-includes/Requests/src/Auth/Basic.php
 create mode 100644 wp-includes/Requests/src/Autoload.php
 create mode 100644 wp-includes/Requests/src/Capability.php
 create mode 100644 wp-includes/Requests/src/Cookie.php
 create mode 100644 wp-includes/Requests/src/Cookie/Jar.php
 create mode 100644 wp-includes/Requests/src/Exception.php
 create mode 100644 wp-includes/Requests/src/Exception/ArgumentCount.php
 create mode 100644 wp-includes/Requests/src/Exception/Http.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status304.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status305.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status306.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status400.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status401.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status402.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status403.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status404.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status405.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status406.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status407.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status408.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status409.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status410.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status411.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status412.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status413.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status414.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status415.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status416.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status417.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status418.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status428.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status429.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status431.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status500.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status501.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status502.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status503.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status504.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status505.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/Status511.php
 create mode 100644 wp-includes/Requests/src/Exception/Http/StatusUnknown.php
 create mode 100644 wp-includes/Requests/src/Exception/InvalidArgument.php
 create mode 100644 wp-includes/Requests/src/Exception/Transport.php
 create mode 100644 wp-includes/Requests/src/Exception/Transport/Curl.php
 create mode 100644 wp-includes/Requests/src/HookManager.php
 create mode 100644 wp-includes/Requests/src/Hooks.php
 create mode 100644 wp-includes/Requests/src/IdnaEncoder.php
 create mode 100644 wp-includes/Requests/src/Ipv6.php
 create mode 100644 wp-includes/Requests/src/Iri.php
 create mode 100644 wp-includes/Requests/src/Port.php
 create mode 100644 wp-includes/Requests/src/Proxy.php
 create mode 100644 wp-includes/Requests/src/Proxy/Http.php
 create mode 100644 wp-includes/Requests/src/Requests.php
 create mode 100644 wp-includes/Requests/src/Response.php
 create mode 100644 wp-includes/Requests/src/Response/Headers.php
 create mode 100644 wp-includes/Requests/src/Session.php
 create mode 100644 wp-includes/Requests/src/Ssl.php
 create mode 100644 wp-includes/Requests/src/Transport.php
 create mode 100644 wp-includes/Requests/src/Transport/Curl.php
 create mode 100644 wp-includes/Requests/src/Transport/Fsockopen.php
 create mode 100644 wp-includes/Requests/src/Utility/CaseInsensitiveDictionary.php
 create mode 100644 wp-includes/Requests/src/Utility/FilteredIterator.php
 create mode 100644 wp-includes/Requests/src/Utility/InputValidator.php

(limited to 'wp-includes/Requests')

diff --git a/wp-includes/Requests/library/Requests.php b/wp-includes/Requests/library/Requests.php
new file mode 100644
index 0000000..9e42db5
--- /dev/null
+++ b/wp-includes/Requests/library/Requests.php
@@ -0,0 +1,12 @@
+<?php
+/**
+ * Loads the old Requests class file when the autoloader
+ * references the original PSR-0 Requests class.
+ *
+ * @deprecated 6.2.0
+ * @package WordPress
+ * @subpackage Requests
+ * @since 6.2.0
+ */
+
+include_once ABSPATH . WPINC . '/class-requests.php';
diff --git a/wp-includes/Requests/src/Auth.php b/wp-includes/Requests/src/Auth.php
new file mode 100644
index 0000000..63ebb08
--- /dev/null
+++ b/wp-includes/Requests/src/Auth.php
@@ -0,0 +1,36 @@
+<?php
+/**
+ * Authentication provider interface
+ *
+ * @package Requests\Authentication
+ */
+
+namespace WpOrg\Requests;
+
+use WpOrg\Requests\Hooks;
+
+/**
+ * Authentication provider interface
+ *
+ * Implement this interface to act as an authentication provider.
+ *
+ * Parameters should be passed via the constructor where possible, as this
+ * makes it much easier for users to use your provider.
+ *
+ * @see \WpOrg\Requests\Hooks
+ *
+ * @package Requests\Authentication
+ */
+interface Auth {
+	/**
+	 * Register hooks as needed
+	 *
+	 * This method is called in {@see \WpOrg\Requests\Requests::request()} when the user
+	 * has set an instance as the 'auth' option. Use this callback to register all the
+	 * hooks you'll need.
+	 *
+	 * @see \WpOrg\Requests\Hooks::register()
+	 * @param \WpOrg\Requests\Hooks $hooks Hook system
+	 */
+	public function register(Hooks $hooks);
+}
diff --git a/wp-includes/Requests/src/Auth/Basic.php b/wp-includes/Requests/src/Auth/Basic.php
new file mode 100644
index 0000000..8ea0eb5
--- /dev/null
+++ b/wp-includes/Requests/src/Auth/Basic.php
@@ -0,0 +1,103 @@
+<?php
+/**
+ * Basic Authentication provider
+ *
+ * @package Requests\Authentication
+ */
+
+namespace WpOrg\Requests\Auth;
+
+use WpOrg\Requests\Auth;
+use WpOrg\Requests\Exception\ArgumentCount;
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Hooks;
+
+/**
+ * Basic Authentication provider
+ *
+ * Provides a handler for Basic HTTP authentication via the Authorization
+ * header.
+ *
+ * @package Requests\Authentication
+ */
+class Basic implements Auth {
+	/**
+	 * Username
+	 *
+	 * @var string
+	 */
+	public $user;
+
+	/**
+	 * Password
+	 *
+	 * @var string
+	 */
+	public $pass;
+
+	/**
+	 * Constructor
+	 *
+	 * @since 2.0 Throws an `InvalidArgument` exception.
+	 * @since 2.0 Throws an `ArgumentCount` exception instead of the Requests base `Exception.
+	 *
+	 * @param array|null $args Array of user and password. Must have exactly two elements
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not an array or null.
+	 * @throws \WpOrg\Requests\Exception\ArgumentCount   On incorrect number of array elements (`authbasicbadargs`).
+	 */
+	public function __construct($args = null) {
+		if (is_array($args)) {
+			if (count($args) !== 2) {
+				throw ArgumentCount::create('an array with exactly two elements', count($args), 'authbasicbadargs');
+			}
+
+			list($this->user, $this->pass) = $args;
+			return;
+		}
+
+		if ($args !== null) {
+			throw InvalidArgument::create(1, '$args', 'array|null', gettype($args));
+		}
+	}
+
+	/**
+	 * Register the necessary callbacks
+	 *
+	 * @see \WpOrg\Requests\Auth\Basic::curl_before_send()
+	 * @see \WpOrg\Requests\Auth\Basic::fsockopen_header()
+	 * @param \WpOrg\Requests\Hooks $hooks Hook system
+	 */
+	public function register(Hooks $hooks) {
+		$hooks->register('curl.before_send', [$this, 'curl_before_send']);
+		$hooks->register('fsockopen.after_headers', [$this, 'fsockopen_header']);
+	}
+
+	/**
+	 * Set cURL parameters before the data is sent
+	 *
+	 * @param resource|\CurlHandle $handle cURL handle
+	 */
+	public function curl_before_send(&$handle) {
+		curl_setopt($handle, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
+		curl_setopt($handle, CURLOPT_USERPWD, $this->getAuthString());
+	}
+
+	/**
+	 * Add extra headers to the request before sending
+	 *
+	 * @param string $out HTTP header string
+	 */
+	public function fsockopen_header(&$out) {
+		$out .= sprintf("Authorization: Basic %s\r\n", base64_encode($this->getAuthString()));
+	}
+
+	/**
+	 * Get the authentication string (user:pass)
+	 *
+	 * @return string
+	 */
+	public function getAuthString() {
+		return $this->user . ':' . $this->pass;
+	}
+}
diff --git a/wp-includes/Requests/src/Autoload.php b/wp-includes/Requests/src/Autoload.php
new file mode 100644
index 0000000..669ddec
--- /dev/null
+++ b/wp-includes/Requests/src/Autoload.php
@@ -0,0 +1,187 @@
+<?php
+/**
+ * Autoloader for Requests for PHP.
+ *
+ * Include this file if you'd like to avoid having to create your own autoloader.
+ *
+ * @package Requests
+ * @since   2.0.0
+ *
+ * @codeCoverageIgnore
+ */
+
+namespace WpOrg\Requests;
+
+/*
+ * Ensure the autoloader is only declared once.
+ * This safeguard is in place as this is the typical entry point for this library
+ * and this file being required unconditionally could easily cause
+ * fatal "Class already declared" errors.
+ */
+if (class_exists('WpOrg\Requests\Autoload') === false) {
+
+	/**
+	 * Autoloader for Requests for PHP.
+	 *
+	 * This autoloader supports the PSR-4 based Requests 2.0.0 classes in a case-sensitive manner
+	 * as the most common server OS-es are case-sensitive and the file names are in mixed case.
+	 *
+	 * For the PSR-0 Requests 1.x BC-layer, requested classes will be treated case-insensitively.
+	 *
+	 * @package Requests
+	 */
+	final class Autoload {
+
+		/**
+		 * List of the old PSR-0 class names in lowercase as keys with their PSR-4 case-sensitive name as a value.
+		 *
+		 * @var array
+		 */
+		private static $deprecated_classes = [
+			// Interfaces.
+			'requests_auth'                              => '\WpOrg\Requests\Auth',
+			'requests_hooker'                            => '\WpOrg\Requests\HookManager',
+			'requests_proxy'                             => '\WpOrg\Requests\Proxy',
+			'requests_transport'                         => '\WpOrg\Requests\Transport',
+
+			// Classes.
+			'requests_cookie'                            => '\WpOrg\Requests\Cookie',
+			'requests_exception'                         => '\WpOrg\Requests\Exception',
+			'requests_hooks'                             => '\WpOrg\Requests\Hooks',
+			'requests_idnaencoder'                       => '\WpOrg\Requests\IdnaEncoder',
+			'requests_ipv6'                              => '\WpOrg\Requests\Ipv6',
+			'requests_iri'                               => '\WpOrg\Requests\Iri',
+			'requests_response'                          => '\WpOrg\Requests\Response',
+			'requests_session'                           => '\WpOrg\Requests\Session',
+			'requests_ssl'                               => '\WpOrg\Requests\Ssl',
+			'requests_auth_basic'                        => '\WpOrg\Requests\Auth\Basic',
+			'requests_cookie_jar'                        => '\WpOrg\Requests\Cookie\Jar',
+			'requests_proxy_http'                        => '\WpOrg\Requests\Proxy\Http',
+			'requests_response_headers'                  => '\WpOrg\Requests\Response\Headers',
+			'requests_transport_curl'                    => '\WpOrg\Requests\Transport\Curl',
+			'requests_transport_fsockopen'               => '\WpOrg\Requests\Transport\Fsockopen',
+			'requests_utility_caseinsensitivedictionary' => '\WpOrg\Requests\Utility\CaseInsensitiveDictionary',
+			'requests_utility_filterediterator'          => '\WpOrg\Requests\Utility\FilteredIterator',
+			'requests_exception_http'                    => '\WpOrg\Requests\Exception\Http',
+			'requests_exception_transport'               => '\WpOrg\Requests\Exception\Transport',
+			'requests_exception_transport_curl'          => '\WpOrg\Requests\Exception\Transport\Curl',
+			'requests_exception_http_304'                => '\WpOrg\Requests\Exception\Http\Status304',
+			'requests_exception_http_305'                => '\WpOrg\Requests\Exception\Http\Status305',
+			'requests_exception_http_306'                => '\WpOrg\Requests\Exception\Http\Status306',
+			'requests_exception_http_400'                => '\WpOrg\Requests\Exception\Http\Status400',
+			'requests_exception_http_401'                => '\WpOrg\Requests\Exception\Http\Status401',
+			'requests_exception_http_402'                => '\WpOrg\Requests\Exception\Http\Status402',
+			'requests_exception_http_403'                => '\WpOrg\Requests\Exception\Http\Status403',
+			'requests_exception_http_404'                => '\WpOrg\Requests\Exception\Http\Status404',
+			'requests_exception_http_405'                => '\WpOrg\Requests\Exception\Http\Status405',
+			'requests_exception_http_406'                => '\WpOrg\Requests\Exception\Http\Status406',
+			'requests_exception_http_407'                => '\WpOrg\Requests\Exception\Http\Status407',
+			'requests_exception_http_408'                => '\WpOrg\Requests\Exception\Http\Status408',
+			'requests_exception_http_409'                => '\WpOrg\Requests\Exception\Http\Status409',
+			'requests_exception_http_410'                => '\WpOrg\Requests\Exception\Http\Status410',
+			'requests_exception_http_411'                => '\WpOrg\Requests\Exception\Http\Status411',
+			'requests_exception_http_412'                => '\WpOrg\Requests\Exception\Http\Status412',
+			'requests_exception_http_413'                => '\WpOrg\Requests\Exception\Http\Status413',
+			'requests_exception_http_414'                => '\WpOrg\Requests\Exception\Http\Status414',
+			'requests_exception_http_415'                => '\WpOrg\Requests\Exception\Http\Status415',
+			'requests_exception_http_416'                => '\WpOrg\Requests\Exception\Http\Status416',
+			'requests_exception_http_417'                => '\WpOrg\Requests\Exception\Http\Status417',
+			'requests_exception_http_418'                => '\WpOrg\Requests\Exception\Http\Status418',
+			'requests_exception_http_428'                => '\WpOrg\Requests\Exception\Http\Status428',
+			'requests_exception_http_429'                => '\WpOrg\Requests\Exception\Http\Status429',
+			'requests_exception_http_431'                => '\WpOrg\Requests\Exception\Http\Status431',
+			'requests_exception_http_500'                => '\WpOrg\Requests\Exception\Http\Status500',
+			'requests_exception_http_501'                => '\WpOrg\Requests\Exception\Http\Status501',
+			'requests_exception_http_502'                => '\WpOrg\Requests\Exception\Http\Status502',
+			'requests_exception_http_503'                => '\WpOrg\Requests\Exception\Http\Status503',
+			'requests_exception_http_504'                => '\WpOrg\Requests\Exception\Http\Status504',
+			'requests_exception_http_505'                => '\WpOrg\Requests\Exception\Http\Status505',
+			'requests_exception_http_511'                => '\WpOrg\Requests\Exception\Http\Status511',
+			'requests_exception_http_unknown'            => '\WpOrg\Requests\Exception\Http\StatusUnknown',
+		];
+
+		/**
+		 * Register the autoloader.
+		 *
+		 * Note: the autoloader is *prepended* in the autoload queue.
+		 * This is done to ensure that the Requests 2.0 autoloader takes precedence
+		 * over a potentially (dependency-registered) Requests 1.x autoloader.
+		 *
+		 * @internal This method contains a safeguard against the autoloader being
+		 * registered multiple times. This safeguard uses a global constant to
+		 * (hopefully/in most cases) still function correctly, even if the
+		 * class would be renamed.
+		 *
+		 * @return void
+		 */
+		public static function register() {
+			if (defined('REQUESTS_AUTOLOAD_REGISTERED') === false) {
+				spl_autoload_register([self::class, 'load'], true);
+				define('REQUESTS_AUTOLOAD_REGISTERED', true);
+			}
+		}
+
+		/**
+		 * Autoloader.
+		 *
+		 * @param string $class_name Name of the class name to load.
+		 *
+		 * @return bool Whether a class was loaded or not.
+		 */
+		public static function load($class_name) {
+			// Check that the class starts with "Requests" (PSR-0) or "WpOrg\Requests" (PSR-4).
+			$psr_4_prefix_pos = strpos($class_name, 'WpOrg\\Requests\\');
+
+			if (stripos($class_name, 'Requests') !== 0 && $psr_4_prefix_pos !== 0) {
+				return false;
+			}
+
+			$class_lower = strtolower($class_name);
+
+			if ($class_lower === 'requests') {
+				// Reference to the original PSR-0 Requests class.
+				$file = dirname(__DIR__) . '/library/Requests.php';
+			} elseif ($psr_4_prefix_pos === 0) {
+				// PSR-4 classname.
+				$file = __DIR__ . '/' . strtr(substr($class_name, 15), '\\', '/') . '.php';
+			}
+
+			if (isset($file) && file_exists($file)) {
+				include $file;
+				return true;
+			}
+
+			/*
+			 * Okay, so the class starts with "Requests", but we couldn't find the file.
+			 * If this is one of the deprecated/renamed PSR-0 classes being requested,
+			 * let's alias it to the new name and throw a deprecation notice.
+			 */
+			if (isset(self::$deprecated_classes[$class_lower])) {
+				/*
+				 * Integrators who cannot yet upgrade to the PSR-4 class names can silence deprecations
+				 * by defining a `REQUESTS_SILENCE_PSR0_DEPRECATIONS` constant and setting it to `true`.
+				 * The constant needs to be defined before the first deprecated class is requested
+				 * via this autoloader.
+				 */
+				if (!defined('REQUESTS_SILENCE_PSR0_DEPRECATIONS') || REQUESTS_SILENCE_PSR0_DEPRECATIONS !== true) {
+					// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_trigger_error
+					trigger_error(
+						'The PSR-0 `Requests_...` class names in the Requests library are deprecated.'
+						. ' Switch to the PSR-4 `WpOrg\Requests\...` class names at your earliest convenience.',
+						E_USER_DEPRECATED
+					);
+
+					// Prevent the deprecation notice from being thrown twice.
+					if (!defined('REQUESTS_SILENCE_PSR0_DEPRECATIONS')) {
+						define('REQUESTS_SILENCE_PSR0_DEPRECATIONS', true);
+					}
+				}
+
+				// Create an alias and let the autoloader recursively kick in to load the PSR-4 class.
+				return class_alias(self::$deprecated_classes[$class_lower], $class_name, true);
+			}
+
+			return false;
+		}
+	}
+}
diff --git a/wp-includes/Requests/src/Capability.php b/wp-includes/Requests/src/Capability.php
new file mode 100644
index 0000000..30572ba
--- /dev/null
+++ b/wp-includes/Requests/src/Capability.php
@@ -0,0 +1,36 @@
+<?php
+/**
+ * Capability interface declaring the known capabilities.
+ *
+ * @package Requests\Utilities
+ */
+
+namespace WpOrg\Requests;
+
+/**
+ * Capability interface declaring the known capabilities.
+ *
+ * This is used as the authoritative source for which capabilities can be queried.
+ *
+ * @package Requests\Utilities
+ */
+interface Capability {
+
+	/**
+	 * Support for SSL.
+	 *
+	 * @var string
+	 */
+	const SSL = 'ssl';
+
+	/**
+	 * Collection of all capabilities supported in Requests.
+	 *
+	 * Note: this does not automatically mean that the capability will be supported for your chosen transport!
+	 *
+	 * @var string[]
+	 */
+	const ALL = [
+		self::SSL,
+	];
+}
diff --git a/wp-includes/Requests/src/Cookie.php b/wp-includes/Requests/src/Cookie.php
new file mode 100644
index 0000000..6f971d6
--- /dev/null
+++ b/wp-includes/Requests/src/Cookie.php
@@ -0,0 +1,527 @@
+<?php
+/**
+ * Cookie storage object
+ *
+ * @package Requests\Cookies
+ */
+
+namespace WpOrg\Requests;
+
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Iri;
+use WpOrg\Requests\Response\Headers;
+use WpOrg\Requests\Utility\CaseInsensitiveDictionary;
+use WpOrg\Requests\Utility\InputValidator;
+
+/**
+ * Cookie storage object
+ *
+ * @package Requests\Cookies
+ */
+class Cookie {
+	/**
+	 * Cookie name.
+	 *
+	 * @var string
+	 */
+	public $name;
+
+	/**
+	 * Cookie value.
+	 *
+	 * @var string
+	 */
+	public $value;
+
+	/**
+	 * Cookie attributes
+	 *
+	 * Valid keys are `'path'`, `'domain'`, `'expires'`, `'max-age'`, `'secure'` and
+	 * `'httponly'`.
+	 *
+	 * @var \WpOrg\Requests\Utility\CaseInsensitiveDictionary|array Array-like object
+	 */
+	public $attributes = [];
+
+	/**
+	 * Cookie flags
+	 *
+	 * Valid keys are `'creation'`, `'last-access'`, `'persistent'` and `'host-only'`.
+	 *
+	 * @var array
+	 */
+	public $flags = [];
+
+	/**
+	 * Reference time for relative calculations
+	 *
+	 * This is used in place of `time()` when calculating Max-Age expiration and
+	 * checking time validity.
+	 *
+	 * @var int
+	 */
+	public $reference_time = 0;
+
+	/**
+	 * Create a new cookie object
+	 *
+	 * @param string                                                  $name           The name of the cookie.
+	 * @param string                                                  $value          The value for the cookie.
+	 * @param array|\WpOrg\Requests\Utility\CaseInsensitiveDictionary $attributes Associative array of attribute data
+	 * @param array                                                   $flags          The flags for the cookie.
+	 *                                                                                Valid keys are `'creation'`, `'last-access'`,
+	 *                                                                                `'persistent'` and `'host-only'`.
+	 * @param int|null                                                $reference_time Reference time for relative calculations.
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $name argument is not a string.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $value argument is not a string.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $attributes argument is not an array or iterable object with array access.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $flags argument is not an array.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $reference_time argument is not an integer or null.
+	 */
+	public function __construct($name, $value, $attributes = [], $flags = [], $reference_time = null) {
+		if (is_string($name) === false) {
+			throw InvalidArgument::create(1, '$name', 'string', gettype($name));
+		}
+
+		if (is_string($value) === false) {
+			throw InvalidArgument::create(2, '$value', 'string', gettype($value));
+		}
+
+		if (InputValidator::has_array_access($attributes) === false || InputValidator::is_iterable($attributes) === false) {
+			throw InvalidArgument::create(3, '$attributes', 'array|ArrayAccess&Traversable', gettype($attributes));
+		}
+
+		if (is_array($flags) === false) {
+			throw InvalidArgument::create(4, '$flags', 'array', gettype($flags));
+		}
+
+		if ($reference_time !== null && is_int($reference_time) === false) {
+			throw InvalidArgument::create(5, '$reference_time', 'integer|null', gettype($reference_time));
+		}
+
+		$this->name       = $name;
+		$this->value      = $value;
+		$this->attributes = $attributes;
+		$default_flags    = [
+			'creation'    => time(),
+			'last-access' => time(),
+			'persistent'  => false,
+			'host-only'   => true,
+		];
+		$this->flags      = array_merge($default_flags, $flags);
+
+		$this->reference_time = time();
+		if ($reference_time !== null) {
+			$this->reference_time = $reference_time;
+		}
+
+		$this->normalize();
+	}
+
+	/**
+	 * Get the cookie value
+	 *
+	 * Attributes and other data can be accessed via methods.
+	 */
+	public function __toString() {
+		return $this->value;
+	}
+
+	/**
+	 * Check if a cookie is expired.
+	 *
+	 * Checks the age against $this->reference_time to determine if the cookie
+	 * is expired.
+	 *
+	 * @return boolean True if expired, false if time is valid.
+	 */
+	public function is_expired() {
+		// RFC6265, s. 4.1.2.2:
+		// If a cookie has both the Max-Age and the Expires attribute, the Max-
+		// Age attribute has precedence and controls the expiration date of the
+		// cookie.
+		if (isset($this->attributes['max-age'])) {
+			$max_age = $this->attributes['max-age'];
+			return $max_age < $this->reference_time;
+		}
+
+		if (isset($this->attributes['expires'])) {
+			$expires = $this->attributes['expires'];
+			return $expires < $this->reference_time;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Check if a cookie is valid for a given URI
+	 *
+	 * @param \WpOrg\Requests\Iri $uri URI to check
+	 * @return boolean Whether the cookie is valid for the given URI
+	 */
+	public function uri_matches(Iri $uri) {
+		if (!$this->domain_matches($uri->host)) {
+			return false;
+		}
+
+		if (!$this->path_matches($uri->path)) {
+			return false;
+		}
+
+		return empty($this->attributes['secure']) || $uri->scheme === 'https';
+	}
+
+	/**
+	 * Check if a cookie is valid for a given domain
+	 *
+	 * @param string $domain Domain to check
+	 * @return boolean Whether the cookie is valid for the given domain
+	 */
+	public function domain_matches($domain) {
+		if (is_string($domain) === false) {
+			return false;
+		}
+
+		if (!isset($this->attributes['domain'])) {
+			// Cookies created manually; cookies created by Requests will set
+			// the domain to the requested domain
+			return true;
+		}
+
+		$cookie_domain = $this->attributes['domain'];
+		if ($cookie_domain === $domain) {
+			// The cookie domain and the passed domain are identical.
+			return true;
+		}
+
+		// If the cookie is marked as host-only and we don't have an exact
+		// match, reject the cookie
+		if ($this->flags['host-only'] === true) {
+			return false;
+		}
+
+		if (strlen($domain) <= strlen($cookie_domain)) {
+			// For obvious reasons, the cookie domain cannot be a suffix if the passed domain
+			// is shorter than the cookie domain
+			return false;
+		}
+
+		if (substr($domain, -1 * strlen($cookie_domain)) !== $cookie_domain) {
+			// The cookie domain should be a suffix of the passed domain.
+			return false;
+		}
+
+		$prefix = substr($domain, 0, strlen($domain) - strlen($cookie_domain));
+		if (substr($prefix, -1) !== '.') {
+			// The last character of the passed domain that is not included in the
+			// domain string should be a %x2E (".") character.
+			return false;
+		}
+
+		// The passed domain should be a host name (i.e., not an IP address).
+		return !preg_match('#^(.+\.)\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$#', $domain);
+	}
+
+	/**
+	 * Check if a cookie is valid for a given path
+	 *
+	 * From the path-match check in RFC 6265 section 5.1.4
+	 *
+	 * @param string $request_path Path to check
+	 * @return boolean Whether the cookie is valid for the given path
+	 */
+	public function path_matches($request_path) {
+		if (empty($request_path)) {
+			// Normalize empty path to root
+			$request_path = '/';
+		}
+
+		if (!isset($this->attributes['path'])) {
+			// Cookies created manually; cookies created by Requests will set
+			// the path to the requested path
+			return true;
+		}
+
+		if (is_scalar($request_path) === false) {
+			return false;
+		}
+
+		$cookie_path = $this->attributes['path'];
+
+		if ($cookie_path === $request_path) {
+			// The cookie-path and the request-path are identical.
+			return true;
+		}
+
+		if (strlen($request_path) > strlen($cookie_path) && substr($request_path, 0, strlen($cookie_path)) === $cookie_path) {
+			if (substr($cookie_path, -1) === '/') {
+				// The cookie-path is a prefix of the request-path, and the last
+				// character of the cookie-path is %x2F ("/").
+				return true;
+			}
+
+			if (substr($request_path, strlen($cookie_path), 1) === '/') {
+				// The cookie-path is a prefix of the request-path, and the
+				// first character of the request-path that is not included in
+				// the cookie-path is a %x2F ("/") character.
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Normalize cookie and attributes
+	 *
+	 * @return boolean Whether the cookie was successfully normalized
+	 */
+	public function normalize() {
+		foreach ($this->attributes as $key => $value) {
+			$orig_value = $value;
+
+			if (is_string($key)) {
+				$value = $this->normalize_attribute($key, $value);
+			}
+
+			if ($value === null) {
+				unset($this->attributes[$key]);
+				continue;
+			}
+
+			if ($value !== $orig_value) {
+				$this->attributes[$key] = $value;
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * Parse an individual cookie attribute
+	 *
+	 * Handles parsing individual attributes from the cookie values.
+	 *
+	 * @param string $name Attribute name
+	 * @param string|int|bool $value Attribute value (string/integer value, or true if empty/flag)
+	 * @return mixed Value if available, or null if the attribute value is invalid (and should be skipped)
+	 */
+	protected function normalize_attribute($name, $value) {
+		switch (strtolower($name)) {
+			case 'expires':
+				// Expiration parsing, as per RFC 6265 section 5.2.1
+				if (is_int($value)) {
+					return $value;
+				}
+
+				$expiry_time = strtotime($value);
+				if ($expiry_time === false) {
+					return null;
+				}
+
+				return $expiry_time;
+
+			case 'max-age':
+				// Expiration parsing, as per RFC 6265 section 5.2.2
+				if (is_int($value)) {
+					return $value;
+				}
+
+				// Check that we have a valid age
+				if (!preg_match('/^-?\d+$/', $value)) {
+					return null;
+				}
+
+				$delta_seconds = (int) $value;
+				if ($delta_seconds <= 0) {
+					$expiry_time = 0;
+				} else {
+					$expiry_time = $this->reference_time + $delta_seconds;
+				}
+
+				return $expiry_time;
+
+			case 'domain':
+				// Domains are not required as per RFC 6265 section 5.2.3
+				if (empty($value)) {
+					return null;
+				}
+
+				// Domain normalization, as per RFC 6265 section 5.2.3
+				if ($value[0] === '.') {
+					$value = substr($value, 1);
+				}
+
+				return $value;
+
+			default:
+				return $value;
+		}
+	}
+
+	/**
+	 * Format a cookie for a Cookie header
+	 *
+	 * This is used when sending cookies to a server.
+	 *
+	 * @return string Cookie formatted for Cookie header
+	 */
+	public function format_for_header() {
+		return sprintf('%s=%s', $this->name, $this->value);
+	}
+
+	/**
+	 * Format a cookie for a Set-Cookie header
+	 *
+	 * This is used when sending cookies to clients. This isn't really
+	 * applicable to client-side usage, but might be handy for debugging.
+	 *
+	 * @return string Cookie formatted for Set-Cookie header
+	 */
+	public function format_for_set_cookie() {
+		$header_value = $this->format_for_header();
+		if (!empty($this->attributes)) {
+			$parts = [];
+			foreach ($this->attributes as $key => $value) {
+				// Ignore non-associative attributes
+				if (is_numeric($key)) {
+					$parts[] = $value;
+				} else {
+					$parts[] = sprintf('%s=%s', $key, $value);
+				}
+			}
+
+			$header_value .= '; ' . implode('; ', $parts);
+		}
+
+		return $header_value;
+	}
+
+	/**
+	 * Parse a cookie string into a cookie object
+	 *
+	 * Based on Mozilla's parsing code in Firefox and related projects, which
+	 * is an intentional deviation from RFC 2109 and RFC 2616. RFC 6265
+	 * specifies some of this handling, but not in a thorough manner.
+	 *
+	 * @param string $cookie_header Cookie header value (from a Set-Cookie header)
+	 * @param string $name
+	 * @param int|null $reference_time
+	 * @return \WpOrg\Requests\Cookie Parsed cookie object
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $cookie_header argument is not a string.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $name argument is not a string.
+	 */
+	public static function parse($cookie_header, $name = '', $reference_time = null) {
+		if (is_string($cookie_header) === false) {
+			throw InvalidArgument::create(1, '$cookie_header', 'string', gettype($cookie_header));
+		}
+
+		if (is_string($name) === false) {
+			throw InvalidArgument::create(2, '$name', 'string', gettype($name));
+		}
+
+		$parts   = explode(';', $cookie_header);
+		$kvparts = array_shift($parts);
+
+		if (!empty($name)) {
+			$value = $cookie_header;
+		} elseif (strpos($kvparts, '=') === false) {
+			// Some sites might only have a value without the equals separator.
+			// Deviate from RFC 6265 and pretend it was actually a blank name
+			// (`=foo`)
+			//
+			// https://bugzilla.mozilla.org/show_bug.cgi?id=169091
+			$name  = '';
+			$value = $kvparts;
+		} else {
+			list($name, $value) = explode('=', $kvparts, 2);
+		}
+
+		$name  = trim($name);
+		$value = trim($value);
+
+		// Attribute keys are handled case-insensitively
+		$attributes = new CaseInsensitiveDictionary();
+
+		if (!empty($parts)) {
+			foreach ($parts as $part) {
+				if (strpos($part, '=') === false) {
+					$part_key   = $part;
+					$part_value = true;
+				} else {
+					list($part_key, $part_value) = explode('=', $part, 2);
+					$part_value                  = trim($part_value);
+				}
+
+				$part_key              = trim($part_key);
+				$attributes[$part_key] = $part_value;
+			}
+		}
+
+		return new static($name, $value, $attributes, [], $reference_time);
+	}
+
+	/**
+	 * Parse all Set-Cookie headers from request headers
+	 *
+	 * @param \WpOrg\Requests\Response\Headers $headers Headers to parse from
+	 * @param \WpOrg\Requests\Iri|null $origin URI for comparing cookie origins
+	 * @param int|null $time Reference time for expiration calculation
+	 * @return array
+	 */
+	public static function parse_from_headers(Headers $headers, Iri $origin = null, $time = null) {
+		$cookie_headers = $headers->getValues('Set-Cookie');
+		if (empty($cookie_headers)) {
+			return [];
+		}
+
+		$cookies = [];
+		foreach ($cookie_headers as $header) {
+			$parsed = self::parse($header, '', $time);
+
+			// Default domain/path attributes
+			if (empty($parsed->attributes['domain']) && !empty($origin)) {
+				$parsed->attributes['domain'] = $origin->host;
+				$parsed->flags['host-only']   = true;
+			} else {
+				$parsed->flags['host-only'] = false;
+			}
+
+			$path_is_valid = (!empty($parsed->attributes['path']) && $parsed->attributes['path'][0] === '/');
+			if (!$path_is_valid && !empty($origin)) {
+				$path = $origin->path;
+
+				// Default path normalization as per RFC 6265 section 5.1.4
+				if (substr($path, 0, 1) !== '/') {
+					// If the uri-path is empty or if the first character of
+					// the uri-path is not a %x2F ("/") character, output
+					// %x2F ("/") and skip the remaining steps.
+					$path = '/';
+				} elseif (substr_count($path, '/') === 1) {
+					// If the uri-path contains no more than one %x2F ("/")
+					// character, output %x2F ("/") and skip the remaining
+					// step.
+					$path = '/';
+				} else {
+					// Output the characters of the uri-path from the first
+					// character up to, but not including, the right-most
+					// %x2F ("/").
+					$path = substr($path, 0, strrpos($path, '/'));
+				}
+
+				$parsed->attributes['path'] = $path;
+			}
+
+			// Reject invalid cookie domains
+			if (!empty($origin) && !$parsed->domain_matches($origin->host)) {
+				continue;
+			}
+
+			$cookies[$parsed->name] = $parsed;
+		}
+
+		return $cookies;
+	}
+}
diff --git a/wp-includes/Requests/src/Cookie/Jar.php b/wp-includes/Requests/src/Cookie/Jar.php
new file mode 100644
index 0000000..7633786
--- /dev/null
+++ b/wp-includes/Requests/src/Cookie/Jar.php
@@ -0,0 +1,187 @@
+<?php
+/**
+ * Cookie holder object
+ *
+ * @package Requests\Cookies
+ */
+
+namespace WpOrg\Requests\Cookie;
+
+use ArrayAccess;
+use ArrayIterator;
+use IteratorAggregate;
+use ReturnTypeWillChange;
+use WpOrg\Requests\Cookie;
+use WpOrg\Requests\Exception;
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\HookManager;
+use WpOrg\Requests\Iri;
+use WpOrg\Requests\Response;
+
+/**
+ * Cookie holder object
+ *
+ * @package Requests\Cookies
+ */
+class Jar implements ArrayAccess, IteratorAggregate {
+	/**
+	 * Actual item data
+	 *
+	 * @var array
+	 */
+	protected $cookies = [];
+
+	/**
+	 * Create a new jar
+	 *
+	 * @param array $cookies Existing cookie values
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not an array.
+	 */
+	public function __construct($cookies = []) {
+		if (is_array($cookies) === false) {
+			throw InvalidArgument::create(1, '$cookies', 'array', gettype($cookies));
+		}
+
+		$this->cookies = $cookies;
+	}
+
+	/**
+	 * Normalise cookie data into a \WpOrg\Requests\Cookie
+	 *
+	 * @param string|\WpOrg\Requests\Cookie $cookie Cookie header value, possibly pre-parsed (object).
+	 * @param string                        $key    Optional. The name for this cookie.
+	 * @return \WpOrg\Requests\Cookie
+	 */
+	public function normalize_cookie($cookie, $key = '') {
+		if ($cookie instanceof Cookie) {
+			return $cookie;
+		}
+
+		return Cookie::parse($cookie, $key);
+	}
+
+	/**
+	 * Check if the given item exists
+	 *
+	 * @param string $offset Item key
+	 * @return boolean Does the item exist?
+	 */
+	#[ReturnTypeWillChange]
+	public function offsetExists($offset) {
+		return isset($this->cookies[$offset]);
+	}
+
+	/**
+	 * Get the value for the item
+	 *
+	 * @param string $offset Item key
+	 * @return string|null Item value (null if offsetExists is false)
+	 */
+	#[ReturnTypeWillChange]
+	public function offsetGet($offset) {
+		if (!isset($this->cookies[$offset])) {
+			return null;
+		}
+
+		return $this->cookies[$offset];
+	}
+
+	/**
+	 * Set the given item
+	 *
+	 * @param string $offset Item name
+	 * @param string $value Item value
+	 *
+	 * @throws \WpOrg\Requests\Exception On attempting to use dictionary as list (`invalidset`)
+	 */
+	#[ReturnTypeWillChange]
+	public function offsetSet($offset, $value) {
+		if ($offset === null) {
+			throw new Exception('Object is a dictionary, not a list', 'invalidset');
+		}
+
+		$this->cookies[$offset] = $value;
+	}
+
+	/**
+	 * Unset the given header
+	 *
+	 * @param string $offset The key for the item to unset.
+	 */
+	#[ReturnTypeWillChange]
+	public function offsetUnset($offset) {
+		unset($this->cookies[$offset]);
+	}
+
+	/**
+	 * Get an iterator for the data
+	 *
+	 * @return \ArrayIterator
+	 */
+	#[ReturnTypeWillChange]
+	public function getIterator() {
+		return new ArrayIterator($this->cookies);
+	}
+
+	/**
+	 * Register the cookie handler with the request's hooking system
+	 *
+	 * @param \WpOrg\Requests\HookManager $hooks Hooking system
+	 */
+	public function register(HookManager $hooks) {
+		$hooks->register('requests.before_request', [$this, 'before_request']);
+		$hooks->register('requests.before_redirect_check', [$this, 'before_redirect_check']);
+	}
+
+	/**
+	 * Add Cookie header to a request if we have any
+	 *
+	 * As per RFC 6265, cookies are separated by '; '
+	 *
+	 * @param string $url
+	 * @param array $headers
+	 * @param array $data
+	 * @param string $type
+	 * @param array $options
+	 */
+	public function before_request($url, &$headers, &$data, &$type, &$options) {
+		if (!$url instanceof Iri) {
+			$url = new Iri($url);
+		}
+
+		if (!empty($this->cookies)) {
+			$cookies = [];
+			foreach ($this->cookies as $key => $cookie) {
+				$cookie = $this->normalize_cookie($cookie, $key);
+
+				// Skip expired cookies
+				if ($cookie->is_expired()) {
+					continue;
+				}
+
+				if ($cookie->domain_matches($url->host)) {
+					$cookies[] = $cookie->format_for_header();
+				}
+			}
+
+			$headers['Cookie'] = implode('; ', $cookies);
+		}
+	}
+
+	/**
+	 * Parse all cookies from a response and attach them to the response
+	 *
+	 * @param \WpOrg\Requests\Response $response Response as received.
+	 */
+	public function before_redirect_check(Response $response) {
+		$url = $response->url;
+		if (!$url instanceof Iri) {
+			$url = new Iri($url);
+		}
+
+		$cookies           = Cookie::parse_from_headers($response->headers, $url);
+		$this->cookies     = array_merge($this->cookies, $cookies);
+		$response->cookies = $this;
+	}
+}
diff --git a/wp-includes/Requests/src/Exception.php b/wp-includes/Requests/src/Exception.php
new file mode 100644
index 0000000..b67d1b1
--- /dev/null
+++ b/wp-includes/Requests/src/Exception.php
@@ -0,0 +1,66 @@
+<?php
+/**
+ * Exception for HTTP requests
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests;
+
+use Exception as PHPException;
+
+/**
+ * Exception for HTTP requests
+ *
+ * @package Requests\Exceptions
+ */
+class Exception extends PHPException {
+	/**
+	 * Type of exception
+	 *
+	 * @var string
+	 */
+	protected $type;
+
+	/**
+	 * Data associated with the exception
+	 *
+	 * @var mixed
+	 */
+	protected $data;
+
+	/**
+	 * Create a new exception
+	 *
+	 * @param string $message Exception message
+	 * @param string $type Exception type
+	 * @param mixed $data Associated data
+	 * @param integer $code Exception numerical code, if applicable
+	 */
+	public function __construct($message, $type, $data = null, $code = 0) {
+		parent::__construct($message, $code);
+
+		$this->type = $type;
+		$this->data = $data;
+	}
+
+	/**
+	 * Like {@see \Exception::getCode()}, but a string code.
+	 *
+	 * @codeCoverageIgnore
+	 * @return string
+	 */
+	public function getType() {
+		return $this->type;
+	}
+
+	/**
+	 * Gives any relevant data
+	 *
+	 * @codeCoverageIgnore
+	 * @return mixed
+	 */
+	public function getData() {
+		return $this->data;
+	}
+}
diff --git a/wp-includes/Requests/src/Exception/ArgumentCount.php b/wp-includes/Requests/src/Exception/ArgumentCount.php
new file mode 100644
index 0000000..b5773dd
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/ArgumentCount.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace WpOrg\Requests\Exception;
+
+use WpOrg\Requests\Exception;
+
+/**
+ * Exception for when an incorrect number of arguments are passed to a method.
+ *
+ * Typically, this exception is used when all arguments for a method are optional,
+ * but certain arguments need to be passed together, i.e. a method which can be called
+ * with no arguments or with two arguments, but not with one argument.
+ *
+ * Along the same lines, this exception is also used if a method expects an array
+ * with a certain number of elements and the provided number of elements does not comply.
+ *
+ * @package Requests\Exceptions
+ * @since   2.0.0
+ */
+final class ArgumentCount extends Exception {
+
+	/**
+	 * Create a new argument count exception with a standardized text.
+	 *
+	 * @param string $expected The argument count expected as a phrase.
+	 *                         For example: `at least 2 arguments` or `exactly 1 argument`.
+	 * @param int    $received The actual argument count received.
+	 * @param string $type     Exception type.
+	 *
+	 * @return \WpOrg\Requests\Exception\ArgumentCount
+	 */
+	public static function create($expected, $received, $type) {
+		// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_debug_backtrace
+		$stack = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
+
+		return new self(
+			sprintf(
+				'%s::%s() expects %s, %d given',
+				$stack[1]['class'],
+				$stack[1]['function'],
+				$expected,
+				$received
+			),
+			$type
+		);
+	}
+}
diff --git a/wp-includes/Requests/src/Exception/Http.php b/wp-includes/Requests/src/Exception/Http.php
new file mode 100644
index 0000000..7efbc93
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http.php
@@ -0,0 +1,78 @@
+<?php
+/**
+ * Exception based on HTTP response
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception;
+
+use WpOrg\Requests\Exception;
+use WpOrg\Requests\Exception\Http\StatusUnknown;
+
+/**
+ * Exception based on HTTP response
+ *
+ * @package Requests\Exceptions
+ */
+class Http extends Exception {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 0;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Unknown';
+
+	/**
+	 * Create a new exception
+	 *
+	 * There is no mechanism to pass in the status code, as this is set by the
+	 * subclass used. Reason phrases can vary, however.
+	 *
+	 * @param string|null $reason Reason phrase
+	 * @param mixed $data Associated data
+	 */
+	public function __construct($reason = null, $data = null) {
+		if ($reason !== null) {
+			$this->reason = $reason;
+		}
+
+		$message = sprintf('%d %s', $this->code, $this->reason);
+		parent::__construct($message, 'httpresponse', $data, $this->code);
+	}
+
+	/**
+	 * Get the status message.
+	 *
+	 * @return string
+	 */
+	public function getReason() {
+		return $this->reason;
+	}
+
+	/**
+	 * Get the correct exception class for a given error code
+	 *
+	 * @param int|bool $code HTTP status code, or false if unavailable
+	 * @return string Exception class name to use
+	 */
+	public static function get_class($code) {
+		if (!$code) {
+			return StatusUnknown::class;
+		}
+
+		$class = sprintf('\WpOrg\Requests\Exception\Http\Status%d', $code);
+		if (class_exists($class)) {
+			return $class;
+		}
+
+		return StatusUnknown::class;
+	}
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status304.php b/wp-includes/Requests/src/Exception/Http/Status304.php
new file mode 100644
index 0000000..d510ae7
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status304.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 304 Not Modified responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 304 Not Modified responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status304 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 304;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Not Modified';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status305.php b/wp-includes/Requests/src/Exception/Http/Status305.php
new file mode 100644
index 0000000..8be63c3
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status305.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 305 Use Proxy responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 305 Use Proxy responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status305 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 305;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Use Proxy';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status306.php b/wp-includes/Requests/src/Exception/Http/Status306.php
new file mode 100644
index 0000000..2f3534a
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status306.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 306 Switch Proxy responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 306 Switch Proxy responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status306 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 306;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Switch Proxy';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status400.php b/wp-includes/Requests/src/Exception/Http/Status400.php
new file mode 100644
index 0000000..4e39623
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status400.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 400 Bad Request responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 400 Bad Request responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status400 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 400;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Bad Request';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status401.php b/wp-includes/Requests/src/Exception/Http/Status401.php
new file mode 100644
index 0000000..2a76429
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status401.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 401 Unauthorized responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 401 Unauthorized responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status401 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 401;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Unauthorized';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status402.php b/wp-includes/Requests/src/Exception/Http/Status402.php
new file mode 100644
index 0000000..09d4287
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status402.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 402 Payment Required responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 402 Payment Required responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status402 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 402;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Payment Required';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status403.php b/wp-includes/Requests/src/Exception/Http/Status403.php
new file mode 100644
index 0000000..0b1fc39
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status403.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 403 Forbidden responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 403 Forbidden responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status403 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 403;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Forbidden';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status404.php b/wp-includes/Requests/src/Exception/Http/Status404.php
new file mode 100644
index 0000000..ef39a85
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status404.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 404 Not Found responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 404 Not Found responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status404 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 404;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Not Found';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status405.php b/wp-includes/Requests/src/Exception/Http/Status405.php
new file mode 100644
index 0000000..666fbfe
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status405.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 405 Method Not Allowed responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 405 Method Not Allowed responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status405 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 405;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Method Not Allowed';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status406.php b/wp-includes/Requests/src/Exception/Http/Status406.php
new file mode 100644
index 0000000..37952f8
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status406.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 406 Not Acceptable responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 406 Not Acceptable responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status406 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 406;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Not Acceptable';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status407.php b/wp-includes/Requests/src/Exception/Http/Status407.php
new file mode 100644
index 0000000..d8796f9
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status407.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 407 Proxy Authentication Required responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 407 Proxy Authentication Required responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status407 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 407;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Proxy Authentication Required';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status408.php b/wp-includes/Requests/src/Exception/Http/Status408.php
new file mode 100644
index 0000000..6718d06
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status408.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 408 Request Timeout responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 408 Request Timeout responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status408 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 408;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Request Timeout';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status409.php b/wp-includes/Requests/src/Exception/Http/Status409.php
new file mode 100644
index 0000000..711a5c4
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status409.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 409 Conflict responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 409 Conflict responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status409 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 409;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Conflict';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status410.php b/wp-includes/Requests/src/Exception/Http/Status410.php
new file mode 100644
index 0000000..127443b
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status410.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 410 Gone responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 410 Gone responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status410 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 410;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Gone';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status411.php b/wp-includes/Requests/src/Exception/Http/Status411.php
new file mode 100644
index 0000000..e70e63c
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status411.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 411 Length Required responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 411 Length Required responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status411 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 411;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Length Required';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status412.php b/wp-includes/Requests/src/Exception/Http/Status412.php
new file mode 100644
index 0000000..4a8b918
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status412.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 412 Precondition Failed responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 412 Precondition Failed responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status412 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 412;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Precondition Failed';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status413.php b/wp-includes/Requests/src/Exception/Http/Status413.php
new file mode 100644
index 0000000..96a96fb
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status413.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 413 Request Entity Too Large responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 413 Request Entity Too Large responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status413 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 413;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Request Entity Too Large';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status414.php b/wp-includes/Requests/src/Exception/Http/Status414.php
new file mode 100644
index 0000000..b65ec93
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status414.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 414 Request-URI Too Large responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 414 Request-URI Too Large responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status414 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 414;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Request-URI Too Large';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status415.php b/wp-includes/Requests/src/Exception/Http/Status415.php
new file mode 100644
index 0000000..cb45655
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status415.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 415 Unsupported Media Type responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 415 Unsupported Media Type responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status415 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 415;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Unsupported Media Type';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status416.php b/wp-includes/Requests/src/Exception/Http/Status416.php
new file mode 100644
index 0000000..c3661a1
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status416.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 416 Requested Range Not Satisfiable responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 416 Requested Range Not Satisfiable responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status416 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 416;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Requested Range Not Satisfiable';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status417.php b/wp-includes/Requests/src/Exception/Http/Status417.php
new file mode 100644
index 0000000..4adba9a
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status417.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 417 Expectation Failed responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 417 Expectation Failed responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status417 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 417;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Expectation Failed';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status418.php b/wp-includes/Requests/src/Exception/Http/Status418.php
new file mode 100644
index 0000000..5bcb2b8
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status418.php
@@ -0,0 +1,35 @@
+<?php
+/**
+ * Exception for 418 I'm A Teapot responses
+ *
+ * @link https://tools.ietf.org/html/rfc2324
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 418 I'm A Teapot responses
+ *
+ * @link https://tools.ietf.org/html/rfc2324
+ *
+ * @package Requests\Exceptions
+ */
+final class Status418 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 418;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = "I'm A Teapot";
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status428.php b/wp-includes/Requests/src/Exception/Http/Status428.php
new file mode 100644
index 0000000..4d7ea51
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status428.php
@@ -0,0 +1,35 @@
+<?php
+/**
+ * Exception for 428 Precondition Required responses
+ *
+ * @link https://tools.ietf.org/html/rfc6585
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 428 Precondition Required responses
+ *
+ * @link https://tools.ietf.org/html/rfc6585
+ *
+ * @package Requests\Exceptions
+ */
+final class Status428 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 428;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Precondition Required';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status429.php b/wp-includes/Requests/src/Exception/Http/Status429.php
new file mode 100644
index 0000000..2018196
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status429.php
@@ -0,0 +1,35 @@
+<?php
+/**
+ * Exception for 429 Too Many Requests responses
+ *
+ * @link https://tools.ietf.org/html/draft-nottingham-http-new-status-04
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 429 Too Many Requests responses
+ *
+ * @link https://tools.ietf.org/html/draft-nottingham-http-new-status-04
+ *
+ * @package Requests\Exceptions
+ */
+final class Status429 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 429;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Too Many Requests';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status431.php b/wp-includes/Requests/src/Exception/Http/Status431.php
new file mode 100644
index 0000000..50bba43
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status431.php
@@ -0,0 +1,35 @@
+<?php
+/**
+ * Exception for 431 Request Header Fields Too Large responses
+ *
+ * @link https://tools.ietf.org/html/rfc6585
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 431 Request Header Fields Too Large responses
+ *
+ * @link https://tools.ietf.org/html/rfc6585
+ *
+ * @package Requests\Exceptions
+ */
+final class Status431 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 431;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Request Header Fields Too Large';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status500.php b/wp-includes/Requests/src/Exception/Http/Status500.php
new file mode 100644
index 0000000..42089ff
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status500.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 500 Internal Server Error responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 500 Internal Server Error responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status500 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 500;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Internal Server Error';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status501.php b/wp-includes/Requests/src/Exception/Http/Status501.php
new file mode 100644
index 0000000..2b92430
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status501.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 501 Not Implemented responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 501 Not Implemented responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status501 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 501;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Not Implemented';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status502.php b/wp-includes/Requests/src/Exception/Http/Status502.php
new file mode 100644
index 0000000..7ce2b0f
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status502.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 502 Bad Gateway responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 502 Bad Gateway responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status502 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 502;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Bad Gateway';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status503.php b/wp-includes/Requests/src/Exception/Http/Status503.php
new file mode 100644
index 0000000..2e70dd9
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status503.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 503 Service Unavailable responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 503 Service Unavailable responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status503 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 503;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Service Unavailable';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status504.php b/wp-includes/Requests/src/Exception/Http/Status504.php
new file mode 100644
index 0000000..efa100a
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status504.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 504 Gateway Timeout responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 504 Gateway Timeout responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status504 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 504;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Gateway Timeout';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status505.php b/wp-includes/Requests/src/Exception/Http/Status505.php
new file mode 100644
index 0000000..71ba463
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status505.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Exception for 505 HTTP Version Not Supported responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 505 HTTP Version Not Supported responses
+ *
+ * @package Requests\Exceptions
+ */
+final class Status505 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 505;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'HTTP Version Not Supported';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/Status511.php b/wp-includes/Requests/src/Exception/Http/Status511.php
new file mode 100644
index 0000000..8d6fee7
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/Status511.php
@@ -0,0 +1,35 @@
+<?php
+/**
+ * Exception for 511 Network Authentication Required responses
+ *
+ * @link https://tools.ietf.org/html/rfc6585
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+
+/**
+ * Exception for 511 Network Authentication Required responses
+ *
+ * @link https://tools.ietf.org/html/rfc6585
+ *
+ * @package Requests\Exceptions
+ */
+final class Status511 extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer
+	 */
+	protected $code = 511;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Network Authentication Required';
+}
diff --git a/wp-includes/Requests/src/Exception/Http/StatusUnknown.php b/wp-includes/Requests/src/Exception/Http/StatusUnknown.php
new file mode 100644
index 0000000..802793f
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Http/StatusUnknown.php
@@ -0,0 +1,49 @@
+<?php
+/**
+ * Exception for unknown status responses
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Http;
+
+use WpOrg\Requests\Exception\Http;
+use WpOrg\Requests\Response;
+
+/**
+ * Exception for unknown status responses
+ *
+ * @package Requests\Exceptions
+ */
+final class StatusUnknown extends Http {
+	/**
+	 * HTTP status code
+	 *
+	 * @var integer|bool Code if available, false if an error occurred
+	 */
+	protected $code = 0;
+
+	/**
+	 * Reason phrase
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Unknown';
+
+	/**
+	 * Create a new exception
+	 *
+	 * If `$data` is an instance of {@see \WpOrg\Requests\Response}, uses the status
+	 * code from it. Otherwise, sets as 0
+	 *
+	 * @param string|null $reason Reason phrase
+	 * @param mixed $data Associated data
+	 */
+	public function __construct($reason = null, $data = null) {
+		if ($data instanceof Response) {
+			$this->code = (int) $data->status_code;
+		}
+
+		parent::__construct($reason, $data);
+	}
+}
diff --git a/wp-includes/Requests/src/Exception/InvalidArgument.php b/wp-includes/Requests/src/Exception/InvalidArgument.php
new file mode 100644
index 0000000..0ab7332
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/InvalidArgument.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace WpOrg\Requests\Exception;
+
+use InvalidArgumentException;
+
+/**
+ * Exception for an invalid argument passed.
+ *
+ * @package Requests\Exceptions
+ * @since   2.0.0
+ */
+final class InvalidArgument extends InvalidArgumentException {
+
+	/**
+	 * Create a new invalid argument exception with a standardized text.
+	 *
+	 * @param int    $position The argument position in the function signature. 1-based.
+	 * @param string $name     The argument name in the function signature.
+	 * @param string $expected The argument type expected as a string.
+	 * @param string $received The actual argument type received.
+	 *
+	 * @return \WpOrg\Requests\Exception\InvalidArgument
+	 */
+	public static function create($position, $name, $expected, $received) {
+		// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_debug_backtrace
+		$stack = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
+
+		return new self(
+			sprintf(
+				'%s::%s(): Argument #%d (%s) must be of type %s, %s given',
+				$stack[1]['class'],
+				$stack[1]['function'],
+				$position,
+				$name,
+				$expected,
+				$received
+			)
+		);
+	}
+}
diff --git a/wp-includes/Requests/src/Exception/Transport.php b/wp-includes/Requests/src/Exception/Transport.php
new file mode 100644
index 0000000..c76e92e
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Transport.php
@@ -0,0 +1,17 @@
+<?php
+/**
+ * Transport Exception
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception;
+
+use WpOrg\Requests\Exception;
+
+/**
+ * Transport Exception
+ *
+ * @package Requests\Exceptions
+ */
+class Transport extends Exception {}
diff --git a/wp-includes/Requests/src/Exception/Transport/Curl.php b/wp-includes/Requests/src/Exception/Transport/Curl.php
new file mode 100644
index 0000000..4c0294d
--- /dev/null
+++ b/wp-includes/Requests/src/Exception/Transport/Curl.php
@@ -0,0 +1,80 @@
+<?php
+/**
+ * CURL Transport Exception.
+ *
+ * @package Requests\Exceptions
+ */
+
+namespace WpOrg\Requests\Exception\Transport;
+
+use WpOrg\Requests\Exception\Transport;
+
+/**
+ * CURL Transport Exception.
+ *
+ * @package Requests\Exceptions
+ */
+final class Curl extends Transport {
+
+	const EASY  = 'cURLEasy';
+	const MULTI = 'cURLMulti';
+	const SHARE = 'cURLShare';
+
+	/**
+	 * cURL error code
+	 *
+	 * @var integer
+	 */
+	protected $code = -1;
+
+	/**
+	 * Which type of cURL error
+	 *
+	 * EASY|MULTI|SHARE
+	 *
+	 * @var string
+	 */
+	protected $type = 'Unknown';
+
+	/**
+	 * Clear text error message
+	 *
+	 * @var string
+	 */
+	protected $reason = 'Unknown';
+
+	/**
+	 * Create a new exception.
+	 *
+	 * @param string $message Exception message.
+	 * @param string $type    Exception type.
+	 * @param mixed  $data    Associated data, if applicable.
+	 * @param int    $code    Exception numerical code, if applicable.
+	 */
+	public function __construct($message, $type, $data = null, $code = 0) {
+		if ($type !== null) {
+			$this->type = $type;
+		}
+
+		if ($code !== null) {
+			$this->code = (int) $code;
+		}
+
+		if ($message !== null) {
+			$this->reason = $message;
+		}
+
+		$message = sprintf('%d %s', $this->code, $this->reason);
+		parent::__construct($message, $this->type, $data, $this->code);
+	}
+
+	/**
+	 * Get the error message.
+	 *
+	 * @return string
+	 */
+	public function getReason() {
+		return $this->reason;
+	}
+
+}
diff --git a/wp-includes/Requests/src/HookManager.php b/wp-includes/Requests/src/HookManager.php
new file mode 100644
index 0000000..f292017
--- /dev/null
+++ b/wp-includes/Requests/src/HookManager.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ * Event dispatcher
+ *
+ * @package Requests\EventDispatcher
+ */
+
+namespace WpOrg\Requests;
+
+/**
+ * Event dispatcher
+ *
+ * @package Requests\EventDispatcher
+ */
+interface HookManager {
+	/**
+	 * Register a callback for a hook
+	 *
+	 * @param string $hook Hook name
+	 * @param callable $callback Function/method to call on event
+	 * @param int $priority Priority number. <0 is executed earlier, >0 is executed later
+	 */
+	public function register($hook, $callback, $priority = 0);
+
+	/**
+	 * Dispatch a message
+	 *
+	 * @param string $hook Hook name
+	 * @param array $parameters Parameters to pass to callbacks
+	 * @return boolean Successfulness
+	 */
+	public function dispatch($hook, $parameters = []);
+}
diff --git a/wp-includes/Requests/src/Hooks.php b/wp-includes/Requests/src/Hooks.php
new file mode 100644
index 0000000..d8023ed
--- /dev/null
+++ b/wp-includes/Requests/src/Hooks.php
@@ -0,0 +1,103 @@
+<?php
+/**
+ * Handles adding and dispatching events
+ *
+ * @package Requests\EventDispatcher
+ */
+
+namespace WpOrg\Requests;
+
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\HookManager;
+use WpOrg\Requests\Utility\InputValidator;
+
+/**
+ * Handles adding and dispatching events
+ *
+ * @package Requests\EventDispatcher
+ */
+class Hooks implements HookManager {
+	/**
+	 * Registered callbacks for each hook
+	 *
+	 * @var array
+	 */
+	protected $hooks = [];
+
+	/**
+	 * Register a callback for a hook
+	 *
+	 * @param string $hook Hook name
+	 * @param callable $callback Function/method to call on event
+	 * @param int $priority Priority number. <0 is executed earlier, >0 is executed later
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $hook argument is not a string.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $callback argument is not callable.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $priority argument is not an integer.
+	 */
+	public function register($hook, $callback, $priority = 0) {
+		if (is_string($hook) === false) {
+			throw InvalidArgument::create(1, '$hook', 'string', gettype($hook));
+		}
+
+		if (is_callable($callback) === false) {
+			throw InvalidArgument::create(2, '$callback', 'callable', gettype($callback));
+		}
+
+		if (InputValidator::is_numeric_array_key($priority) === false) {
+			throw InvalidArgument::create(3, '$priority', 'integer', gettype($priority));
+		}
+
+		if (!isset($this->hooks[$hook])) {
+			$this->hooks[$hook] = [
+				$priority => [],
+			];
+		} elseif (!isset($this->hooks[$hook][$priority])) {
+			$this->hooks[$hook][$priority] = [];
+		}
+
+		$this->hooks[$hook][$priority][] = $callback;
+	}
+
+	/**
+	 * Dispatch a message
+	 *
+	 * @param string $hook Hook name
+	 * @param array $parameters Parameters to pass to callbacks
+	 * @return boolean Successfulness
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $hook argument is not a string.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $parameters argument is not an array.
+	 */
+	public function dispatch($hook, $parameters = []) {
+		if (is_string($hook) === false) {
+			throw InvalidArgument::create(1, '$hook', 'string', gettype($hook));
+		}
+
+		// Check strictly against array, as Array* objects don't work in combination with `call_user_func_array()`.
+		if (is_array($parameters) === false) {
+			throw InvalidArgument::create(2, '$parameters', 'array', gettype($parameters));
+		}
+
+		if (empty($this->hooks[$hook])) {
+			return false;
+		}
+
+		if (!empty($parameters)) {
+			// Strip potential keys from the array to prevent them being interpreted as parameter names in PHP 8.0.
+			$parameters = array_values($parameters);
+		}
+
+		ksort($this->hooks[$hook]);
+
+		foreach ($this->hooks[$hook] as $priority => $hooked) {
+			foreach ($hooked as $callback) {
+				$callback(...$parameters);
+			}
+		}
+
+		return true;
+	}
+
+	public function __wakeup() {
+		throw new \LogicException( __CLASS__ . ' should never be unserialized' );
+	}
+}
diff --git a/wp-includes/Requests/src/IdnaEncoder.php b/wp-includes/Requests/src/IdnaEncoder.php
new file mode 100644
index 0000000..4257a1a
--- /dev/null
+++ b/wp-includes/Requests/src/IdnaEncoder.php
@@ -0,0 +1,412 @@
+<?php
+
+namespace WpOrg\Requests;
+
+use WpOrg\Requests\Exception;
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Utility\InputValidator;
+
+/**
+ * IDNA URL encoder
+ *
+ * Note: Not fully compliant, as nameprep does nothing yet.
+ *
+ * @package Requests\Utilities
+ *
+ * @link https://tools.ietf.org/html/rfc3490 IDNA specification
+ * @link https://tools.ietf.org/html/rfc3492 Punycode/Bootstrap specification
+ */
+class IdnaEncoder {
+	/**
+	 * ACE prefix used for IDNA
+	 *
+	 * @link https://tools.ietf.org/html/rfc3490#section-5
+	 * @var string
+	 */
+	const ACE_PREFIX = 'xn--';
+
+	/**
+	 * Maximum length of a IDNA URL in ASCII.
+	 *
+	 * @see \WpOrg\Requests\IdnaEncoder::to_ascii()
+	 *
+	 * @since 2.0.0
+	 *
+	 * @var int
+	 */
+	const MAX_LENGTH = 64;
+
+	/**#@+
+	 * Bootstrap constant for Punycode
+	 *
+	 * @link https://tools.ietf.org/html/rfc3492#section-5
+	 * @var int
+	 */
+	const BOOTSTRAP_BASE         = 36;
+	const BOOTSTRAP_TMIN         = 1;
+	const BOOTSTRAP_TMAX         = 26;
+	const BOOTSTRAP_SKEW         = 38;
+	const BOOTSTRAP_DAMP         = 700;
+	const BOOTSTRAP_INITIAL_BIAS = 72;
+	const BOOTSTRAP_INITIAL_N    = 128;
+	/**#@-*/
+
+	/**
+	 * Encode a hostname using Punycode
+	 *
+	 * @param string|Stringable $hostname Hostname
+	 * @return string Punycode-encoded hostname
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not a string or a stringable object.
+	 */
+	public static function encode($hostname) {
+		if (InputValidator::is_string_or_stringable($hostname) === false) {
+			throw InvalidArgument::create(1, '$hostname', 'string|Stringable', gettype($hostname));
+		}
+
+		$parts = explode('.', $hostname);
+		foreach ($parts as &$part) {
+			$part = self::to_ascii($part);
+		}
+
+		return implode('.', $parts);
+	}
+
+	/**
+	 * Convert a UTF-8 text string to an ASCII string using Punycode
+	 *
+	 * @param string $text ASCII or UTF-8 string (max length 64 characters)
+	 * @return string ASCII string
+	 *
+	 * @throws \WpOrg\Requests\Exception Provided string longer than 64 ASCII characters (`idna.provided_too_long`)
+	 * @throws \WpOrg\Requests\Exception Prepared string longer than 64 ASCII characters (`idna.prepared_too_long`)
+	 * @throws \WpOrg\Requests\Exception Provided string already begins with xn-- (`idna.provided_is_prefixed`)
+	 * @throws \WpOrg\Requests\Exception Encoded string longer than 64 ASCII characters (`idna.encoded_too_long`)
+	 */
+	public static function to_ascii($text) {
+		// Step 1: Check if the text is already ASCII
+		if (self::is_ascii($text)) {
+			// Skip to step 7
+			if (strlen($text) < self::MAX_LENGTH) {
+				return $text;
+			}
+
+			throw new Exception('Provided string is too long', 'idna.provided_too_long', $text);
+		}
+
+		// Step 2: nameprep
+		$text = self::nameprep($text);
+
+		// Step 3: UseSTD3ASCIIRules is false, continue
+		// Step 4: Check if it's ASCII now
+		if (self::is_ascii($text)) {
+			// Skip to step 7
+			/*
+			 * As the `nameprep()` method returns the original string, this code will never be reached until
+			 * that method is properly implemented.
+			 */
+			// @codeCoverageIgnoreStart
+			if (strlen($text) < self::MAX_LENGTH) {
+				return $text;
+			}
+
+			throw new Exception('Prepared string is too long', 'idna.prepared_too_long', $text);
+			// @codeCoverageIgnoreEnd
+		}
+
+		// Step 5: Check ACE prefix
+		if (strpos($text, self::ACE_PREFIX) === 0) {
+			throw new Exception('Provided string begins with ACE prefix', 'idna.provided_is_prefixed', $text);
+		}
+
+		// Step 6: Encode with Punycode
+		$text = self::punycode_encode($text);
+
+		// Step 7: Prepend ACE prefix
+		$text = self::ACE_PREFIX . $text;
+
+		// Step 8: Check size
+		if (strlen($text) < self::MAX_LENGTH) {
+			return $text;
+		}
+
+		throw new Exception('Encoded string is too long', 'idna.encoded_too_long', $text);
+	}
+
+	/**
+	 * Check whether a given text string contains only ASCII characters
+	 *
+	 * @internal (Testing found regex was the fastest implementation)
+	 *
+	 * @param string $text Text to examine.
+	 * @return bool Is the text string ASCII-only?
+	 */
+	protected static function is_ascii($text) {
+		return (preg_match('/(?:[^\x00-\x7F])/', $text) !== 1);
+	}
+
+	/**
+	 * Prepare a text string for use as an IDNA name
+	 *
+	 * @todo Implement this based on RFC 3491 and the newer 5891
+	 * @param string $text Text to prepare.
+	 * @return string Prepared string
+	 */
+	protected static function nameprep($text) {
+		return $text;
+	}
+
+	/**
+	 * Convert a UTF-8 string to a UCS-4 codepoint array
+	 *
+	 * Based on \WpOrg\Requests\Iri::replace_invalid_with_pct_encoding()
+	 *
+	 * @param string $input Text to convert.
+	 * @return array Unicode code points
+	 *
+	 * @throws \WpOrg\Requests\Exception Invalid UTF-8 codepoint (`idna.invalidcodepoint`)
+	 */
+	protected static function utf8_to_codepoints($input) {
+		$codepoints = [];
+
+		// Get number of bytes
+		$strlen = strlen($input);
+
+		// phpcs:ignore Generic.CodeAnalysis.JumbledIncrementer -- This is a deliberate choice.
+		for ($position = 0; $position < $strlen; $position++) {
+			$value = ord($input[$position]);
+
+			if ((~$value & 0x80) === 0x80) {            // One byte sequence:
+				$character = $value;
+				$length    = 1;
+				$remaining = 0;
+			} elseif (($value & 0xE0) === 0xC0) {       // Two byte sequence:
+				$character = ($value & 0x1F) << 6;
+				$length    = 2;
+				$remaining = 1;
+			} elseif (($value & 0xF0) === 0xE0) {       // Three byte sequence:
+				$character = ($value & 0x0F) << 12;
+				$length    = 3;
+				$remaining = 2;
+			} elseif (($value & 0xF8) === 0xF0) {       // Four byte sequence:
+				$character = ($value & 0x07) << 18;
+				$length    = 4;
+				$remaining = 3;
+			} else {                                    // Invalid byte:
+				throw new Exception('Invalid Unicode codepoint', 'idna.invalidcodepoint', $value);
+			}
+
+			if ($remaining > 0) {
+				if ($position + $length > $strlen) {
+					throw new Exception('Invalid Unicode codepoint', 'idna.invalidcodepoint', $character);
+				}
+
+				for ($position++; $remaining > 0; $position++) {
+					$value = ord($input[$position]);
+
+					// If it is invalid, count the sequence as invalid and reprocess the current byte:
+					if (($value & 0xC0) !== 0x80) {
+						throw new Exception('Invalid Unicode codepoint', 'idna.invalidcodepoint', $character);
+					}
+
+					--$remaining;
+					$character |= ($value & 0x3F) << ($remaining * 6);
+				}
+
+				$position--;
+			}
+
+			if (// Non-shortest form sequences are invalid
+				$length > 1 && $character <= 0x7F
+				|| $length > 2 && $character <= 0x7FF
+				|| $length > 3 && $character <= 0xFFFF
+				// Outside of range of ucschar codepoints
+				// Noncharacters
+				|| ($character & 0xFFFE) === 0xFFFE
+				|| $character >= 0xFDD0 && $character <= 0xFDEF
+				|| (
+					// Everything else not in ucschar
+					$character > 0xD7FF && $character < 0xF900
+					|| $character < 0x20
+					|| $character > 0x7E && $character < 0xA0
+					|| $character > 0xEFFFD
+				)
+			) {
+				throw new Exception('Invalid Unicode codepoint', 'idna.invalidcodepoint', $character);
+			}
+
+			$codepoints[] = $character;
+		}
+
+		return $codepoints;
+	}
+
+	/**
+	 * RFC3492-compliant encoder
+	 *
+	 * @internal Pseudo-code from Section 6.3 is commented with "#" next to relevant code
+	 *
+	 * @param string $input UTF-8 encoded string to encode
+	 * @return string Punycode-encoded string
+	 *
+	 * @throws \WpOrg\Requests\Exception On character outside of the domain (never happens with Punycode) (`idna.character_outside_domain`)
+	 */
+	public static function punycode_encode($input) {
+		$output = '';
+		// let n = initial_n
+		$n = self::BOOTSTRAP_INITIAL_N;
+		// let delta = 0
+		$delta = 0;
+		// let bias = initial_bias
+		$bias = self::BOOTSTRAP_INITIAL_BIAS;
+		// let h = b = the number of basic code points in the input
+		$h = 0;
+		$b = 0; // see loop
+		// copy them to the output in order
+		$codepoints = self::utf8_to_codepoints($input);
+		$extended   = [];
+
+		foreach ($codepoints as $char) {
+			if ($char < 128) {
+				// Character is valid ASCII
+				// TODO: this should also check if it's valid for a URL
+				$output .= chr($char);
+				$h++;
+
+				// Check if the character is non-ASCII, but below initial n
+				// This never occurs for Punycode, so ignore in coverage
+				// @codeCoverageIgnoreStart
+			} elseif ($char < $n) {
+				throw new Exception('Invalid character', 'idna.character_outside_domain', $char);
+				// @codeCoverageIgnoreEnd
+			} else {
+				$extended[$char] = true;
+			}
+		}
+
+		$extended = array_keys($extended);
+		sort($extended);
+		$b = $h;
+		// [copy them] followed by a delimiter if b > 0
+		if (strlen($output) > 0) {
+			$output .= '-';
+		}
+
+		// {if the input contains a non-basic code point < n then fail}
+		// while h < length(input) do begin
+		$codepointcount = count($codepoints);
+		while ($h < $codepointcount) {
+			// let m = the minimum code point >= n in the input
+			$m = array_shift($extended);
+			//printf('next code point to insert is %s' . PHP_EOL, dechex($m));
+			// let delta = delta + (m - n) * (h + 1), fail on overflow
+			$delta += ($m - $n) * ($h + 1);
+			// let n = m
+			$n = $m;
+			// for each code point c in the input (in order) do begin
+			for ($num = 0; $num < $codepointcount; $num++) {
+				$c = $codepoints[$num];
+				// if c < n then increment delta, fail on overflow
+				if ($c < $n) {
+					$delta++;
+				} elseif ($c === $n) { // if c == n then begin
+					// let q = delta
+					$q = $delta;
+					// for k = base to infinity in steps of base do begin
+					for ($k = self::BOOTSTRAP_BASE; ; $k += self::BOOTSTRAP_BASE) {
+						// let t = tmin if k <= bias {+ tmin}, or
+						//     tmax if k >= bias + tmax, or k - bias otherwise
+						if ($k <= ($bias + self::BOOTSTRAP_TMIN)) {
+							$t = self::BOOTSTRAP_TMIN;
+						} elseif ($k >= ($bias + self::BOOTSTRAP_TMAX)) {
+							$t = self::BOOTSTRAP_TMAX;
+						} else {
+							$t = $k - $bias;
+						}
+
+						// if q < t then break
+						if ($q < $t) {
+							break;
+						}
+
+						// output the code point for digit t + ((q - t) mod (base - t))
+						$digit   = (int) ($t + (($q - $t) % (self::BOOTSTRAP_BASE - $t)));
+						$output .= self::digit_to_char($digit);
+						// let q = (q - t) div (base - t)
+						$q = (int) floor(($q - $t) / (self::BOOTSTRAP_BASE - $t));
+					} // end
+					// output the code point for digit q
+					$output .= self::digit_to_char($q);
+					// let bias = adapt(delta, h + 1, test h equals b?)
+					$bias = self::adapt($delta, $h + 1, $h === $b);
+					// let delta = 0
+					$delta = 0;
+					// increment h
+					$h++;
+				} // end
+			} // end
+			// increment delta and n
+			$delta++;
+			$n++;
+		} // end
+
+		return $output;
+	}
+
+	/**
+	 * Convert a digit to its respective character
+	 *
+	 * @link https://tools.ietf.org/html/rfc3492#section-5
+	 *
+	 * @param int $digit Digit in the range 0-35
+	 * @return string Single character corresponding to digit
+	 *
+	 * @throws \WpOrg\Requests\Exception On invalid digit (`idna.invalid_digit`)
+	 */
+	protected static function digit_to_char($digit) {
+		// @codeCoverageIgnoreStart
+		// As far as I know, this never happens, but still good to be sure.
+		if ($digit < 0 || $digit > 35) {
+			throw new Exception(sprintf('Invalid digit %d', $digit), 'idna.invalid_digit', $digit);
+		}
+
+		// @codeCoverageIgnoreEnd
+		$digits = 'abcdefghijklmnopqrstuvwxyz0123456789';
+		return substr($digits, $digit, 1);
+	}
+
+	/**
+	 * Adapt the bias
+	 *
+	 * @link https://tools.ietf.org/html/rfc3492#section-6.1
+	 * @param int $delta
+	 * @param int $numpoints
+	 * @param bool $firsttime
+	 * @return int|float New bias
+	 *
+	 * function adapt(delta,numpoints,firsttime):
+	 */
+	protected static function adapt($delta, $numpoints, $firsttime) {
+		// if firsttime then let delta = delta div damp
+		if ($firsttime) {
+			$delta = floor($delta / self::BOOTSTRAP_DAMP);
+		} else {
+			// else let delta = delta div 2
+			$delta = floor($delta / 2);
+		}
+
+		// let delta = delta + (delta div numpoints)
+		$delta += floor($delta / $numpoints);
+		// let k = 0
+		$k = 0;
+		// while delta > ((base - tmin) * tmax) div 2 do begin
+		$max = floor(((self::BOOTSTRAP_BASE - self::BOOTSTRAP_TMIN) * self::BOOTSTRAP_TMAX) / 2);
+		while ($delta > $max) {
+			// let delta = delta div (base - tmin)
+			$delta = floor($delta / (self::BOOTSTRAP_BASE - self::BOOTSTRAP_TMIN));
+			// let k = k + base
+			$k += self::BOOTSTRAP_BASE;
+		} // end
+		// return k + (((base - tmin + 1) * delta) div (delta + skew))
+		return $k + floor(((self::BOOTSTRAP_BASE - self::BOOTSTRAP_TMIN + 1) * $delta) / ($delta + self::BOOTSTRAP_SKEW));
+	}
+}
diff --git a/wp-includes/Requests/src/Ipv6.php b/wp-includes/Requests/src/Ipv6.php
new file mode 100644
index 0000000..a90ab8a
--- /dev/null
+++ b/wp-includes/Requests/src/Ipv6.php
@@ -0,0 +1,203 @@
+<?php
+/**
+ * Class to validate and to work with IPv6 addresses
+ *
+ * @package Requests\Utilities
+ */
+
+namespace WpOrg\Requests;
+
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Utility\InputValidator;
+
+/**
+ * Class to validate and to work with IPv6 addresses
+ *
+ * This was originally based on the PEAR class of the same name, but has been
+ * entirely rewritten.
+ *
+ * @package Requests\Utilities
+ */
+final class Ipv6 {
+	/**
+	 * Uncompresses an IPv6 address
+	 *
+	 * RFC 4291 allows you to compress consecutive zero pieces in an address to
+	 * '::'. This method expects a valid IPv6 address and expands the '::' to
+	 * the required number of zero pieces.
+	 *
+	 * Example:  FF01::101   ->  FF01:0:0:0:0:0:0:101
+	 *           ::1         ->  0:0:0:0:0:0:0:1
+	 *
+	 * @author Alexander Merz <alexander.merz@web.de>
+	 * @author elfrink at introweb dot nl
+	 * @author Josh Peck <jmp at joshpeck dot org>
+	 * @copyright 2003-2005 The PHP Group
+	 * @license https://opensource.org/licenses/bsd-license.php
+	 *
+	 * @param string|Stringable $ip An IPv6 address
+	 * @return string The uncompressed IPv6 address
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not a string or a stringable object.
+	 */
+	public static function uncompress($ip) {
+		if (InputValidator::is_string_or_stringable($ip) === false) {
+			throw InvalidArgument::create(1, '$ip', 'string|Stringable', gettype($ip));
+		}
+
+		$ip = (string) $ip;
+
+		if (substr_count($ip, '::') !== 1) {
+			return $ip;
+		}
+
+		list($ip1, $ip2) = explode('::', $ip);
+		$c1              = ($ip1 === '') ? -1 : substr_count($ip1, ':');
+		$c2              = ($ip2 === '') ? -1 : substr_count($ip2, ':');
+
+		if (strpos($ip2, '.') !== false) {
+			$c2++;
+		}
+
+		if ($c1 === -1 && $c2 === -1) {
+			// ::
+			$ip = '0:0:0:0:0:0:0:0';
+		} elseif ($c1 === -1) {
+			// ::xxx
+			$fill = str_repeat('0:', 7 - $c2);
+			$ip   = str_replace('::', $fill, $ip);
+		} elseif ($c2 === -1) {
+			// xxx::
+			$fill = str_repeat(':0', 7 - $c1);
+			$ip   = str_replace('::', $fill, $ip);
+		} else {
+			// xxx::xxx
+			$fill = ':' . str_repeat('0:', 6 - $c2 - $c1);
+			$ip   = str_replace('::', $fill, $ip);
+		}
+
+		return $ip;
+	}
+
+	/**
+	 * Compresses an IPv6 address
+	 *
+	 * RFC 4291 allows you to compress consecutive zero pieces in an address to
+	 * '::'. This method expects a valid IPv6 address and compresses consecutive
+	 * zero pieces to '::'.
+	 *
+	 * Example:  FF01:0:0:0:0:0:0:101   ->  FF01::101
+	 *           0:0:0:0:0:0:0:1        ->  ::1
+	 *
+	 * @see \WpOrg\Requests\Ipv6::uncompress()
+	 *
+	 * @param string $ip An IPv6 address
+	 * @return string The compressed IPv6 address
+	 */
+	public static function compress($ip) {
+		// Prepare the IP to be compressed.
+		// Note: Input validation is handled in the `uncompress()` method, which is the first call made in this method.
+		$ip       = self::uncompress($ip);
+		$ip_parts = self::split_v6_v4($ip);
+
+		// Replace all leading zeros
+		$ip_parts[0] = preg_replace('/(^|:)0+([0-9])/', '\1\2', $ip_parts[0]);
+
+		// Find bunches of zeros
+		if (preg_match_all('/(?:^|:)(?:0(?::|$))+/', $ip_parts[0], $matches, PREG_OFFSET_CAPTURE)) {
+			$max = 0;
+			$pos = null;
+			foreach ($matches[0] as $match) {
+				if (strlen($match[0]) > $max) {
+					$max = strlen($match[0]);
+					$pos = $match[1];
+				}
+			}
+
+			$ip_parts[0] = substr_replace($ip_parts[0], '::', $pos, $max);
+		}
+
+		if ($ip_parts[1] !== '') {
+			return implode(':', $ip_parts);
+		} else {
+			return $ip_parts[0];
+		}
+	}
+
+	/**
+	 * Splits an IPv6 address into the IPv6 and IPv4 representation parts
+	 *
+	 * RFC 4291 allows you to represent the last two parts of an IPv6 address
+	 * using the standard IPv4 representation
+	 *
+	 * Example:  0:0:0:0:0:0:13.1.68.3
+	 *           0:0:0:0:0:FFFF:129.144.52.38
+	 *
+	 * @param string $ip An IPv6 address
+	 * @return string[] [0] contains the IPv6 represented part, and [1] the IPv4 represented part
+	 */
+	private static function split_v6_v4($ip) {
+		if (strpos($ip, '.') !== false) {
+			$pos       = strrpos($ip, ':');
+			$ipv6_part = substr($ip, 0, $pos);
+			$ipv4_part = substr($ip, $pos + 1);
+			return [$ipv6_part, $ipv4_part];
+		} else {
+			return [$ip, ''];
+		}
+	}
+
+	/**
+	 * Checks an IPv6 address
+	 *
+	 * Checks if the given IP is a valid IPv6 address
+	 *
+	 * @param string $ip An IPv6 address
+	 * @return bool true if $ip is a valid IPv6 address
+	 */
+	public static function check_ipv6($ip) {
+		// Note: Input validation is handled in the `uncompress()` method, which is the first call made in this method.
+		$ip                = self::uncompress($ip);
+		list($ipv6, $ipv4) = self::split_v6_v4($ip);
+		$ipv6              = explode(':', $ipv6);
+		$ipv4              = explode('.', $ipv4);
+		if (count($ipv6) === 8 && count($ipv4) === 1 || count($ipv6) === 6 && count($ipv4) === 4) {
+			foreach ($ipv6 as $ipv6_part) {
+				// The section can't be empty
+				if ($ipv6_part === '') {
+					return false;
+				}
+
+				// Nor can it be over four characters
+				if (strlen($ipv6_part) > 4) {
+					return false;
+				}
+
+				// Remove leading zeros (this is safe because of the above)
+				$ipv6_part = ltrim($ipv6_part, '0');
+				if ($ipv6_part === '') {
+					$ipv6_part = '0';
+				}
+
+				// Check the value is valid
+				$value = hexdec($ipv6_part);
+				if (dechex($value) !== strtolower($ipv6_part) || $value < 0 || $value > 0xFFFF) {
+					return false;
+				}
+			}
+
+			if (count($ipv4) === 4) {
+				foreach ($ipv4 as $ipv4_part) {
+					$value = (int) $ipv4_part;
+					if ((string) $value !== $ipv4_part || $value < 0 || $value > 0xFF) {
+						return false;
+					}
+				}
+			}
+
+			return true;
+		} else {
+			return false;
+		}
+	}
+}
diff --git a/wp-includes/Requests/src/Iri.php b/wp-includes/Requests/src/Iri.php
new file mode 100644
index 0000000..41ea7a8
--- /dev/null
+++ b/wp-includes/Requests/src/Iri.php
@@ -0,0 +1,1116 @@
+<?php
+/**
+ * IRI parser/serialiser/normaliser
+ *
+ * @package Requests\Utilities
+ */
+
+namespace WpOrg\Requests;
+
+use WpOrg\Requests\Exception;
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Ipv6;
+use WpOrg\Requests\Port;
+use WpOrg\Requests\Utility\InputValidator;
+
+/**
+ * IRI parser/serialiser/normaliser
+ *
+ * Copyright (c) 2007-2010, Geoffrey Sneddon and Steve Minutillo.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *       this list of conditions and the following disclaimer.
+ *
+ *  * Redistributions in binary form must reproduce the above copyright notice,
+ *       this list of conditions and the following disclaimer in the documentation
+ *       and/or other materials provided with the distribution.
+ *
+ *  * Neither the name of the SimplePie Team nor the names of its contributors
+ *       may be used to endorse or promote products derived from this software
+ *       without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @package Requests\Utilities
+ * @author Geoffrey Sneddon
+ * @author Steve Minutillo
+ * @copyright 2007-2009 Geoffrey Sneddon and Steve Minutillo
+ * @license https://opensource.org/licenses/bsd-license.php
+ * @link http://hg.gsnedders.com/iri/
+ *
+ * @property string $iri IRI we're working with
+ * @property-read string $uri IRI in URI form, {@see \WpOrg\Requests\Iri::to_uri()}
+ * @property string $scheme Scheme part of the IRI
+ * @property string $authority Authority part, formatted for a URI (userinfo + host + port)
+ * @property string $iauthority Authority part of the IRI (userinfo + host + port)
+ * @property string $userinfo Userinfo part, formatted for a URI (after '://' and before '@')
+ * @property string $iuserinfo Userinfo part of the IRI (after '://' and before '@')
+ * @property string $host Host part, formatted for a URI
+ * @property string $ihost Host part of the IRI
+ * @property string $port Port part of the IRI (after ':')
+ * @property string $path Path part, formatted for a URI (after first '/')
+ * @property string $ipath Path part of the IRI (after first '/')
+ * @property string $query Query part, formatted for a URI (after '?')
+ * @property string $iquery Query part of the IRI (after '?')
+ * @property string $fragment Fragment, formatted for a URI (after '#')
+ * @property string $ifragment Fragment part of the IRI (after '#')
+ */
+class Iri {
+	/**
+	 * Scheme
+	 *
+	 * @var string|null
+	 */
+	protected $scheme = null;
+
+	/**
+	 * User Information
+	 *
+	 * @var string|null
+	 */
+	protected $iuserinfo = null;
+
+	/**
+	 * ihost
+	 *
+	 * @var string|null
+	 */
+	protected $ihost = null;
+
+	/**
+	 * Port
+	 *
+	 * @var string|null
+	 */
+	protected $port = null;
+
+	/**
+	 * ipath
+	 *
+	 * @var string
+	 */
+	protected $ipath = '';
+
+	/**
+	 * iquery
+	 *
+	 * @var string|null
+	 */
+	protected $iquery = null;
+
+	/**
+	 * ifragment|null
+	 *
+	 * @var string
+	 */
+	protected $ifragment = null;
+
+	/**
+	 * Normalization database
+	 *
+	 * Each key is the scheme, each value is an array with each key as the IRI
+	 * part and value as the default value for that part.
+	 *
+	 * @var array
+	 */
+	protected $normalization = array(
+		'acap' => array(
+			'port' => Port::ACAP,
+		),
+		'dict' => array(
+			'port' => Port::DICT,
+		),
+		'file' => array(
+			'ihost' => 'localhost',
+		),
+		'http' => array(
+			'port' => Port::HTTP,
+		),
+		'https' => array(
+			'port' => Port::HTTPS,
+		),
+	);
+
+	/**
+	 * Return the entire IRI when you try and read the object as a string
+	 *
+	 * @return string
+	 */
+	public function __toString() {
+		return $this->get_iri();
+	}
+
+	/**
+	 * Overload __set() to provide access via properties
+	 *
+	 * @param string $name Property name
+	 * @param mixed $value Property value
+	 */
+	public function __set($name, $value) {
+		if (method_exists($this, 'set_' . $name)) {
+			call_user_func(array($this, 'set_' . $name), $value);
+		}
+		elseif (
+			   $name === 'iauthority'
+			|| $name === 'iuserinfo'
+			|| $name === 'ihost'
+			|| $name === 'ipath'
+			|| $name === 'iquery'
+			|| $name === 'ifragment'
+		) {
+			call_user_func(array($this, 'set_' . substr($name, 1)), $value);
+		}
+	}
+
+	/**
+	 * Overload __get() to provide access via properties
+	 *
+	 * @param string $name Property name
+	 * @return mixed
+	 */
+	public function __get($name) {
+		// isset() returns false for null, we don't want to do that
+		// Also why we use array_key_exists below instead of isset()
+		$props = get_object_vars($this);
+
+		if (
+			$name === 'iri' ||
+			$name === 'uri' ||
+			$name === 'iauthority' ||
+			$name === 'authority'
+		) {
+			$method = 'get_' . $name;
+			$return = $this->$method();
+		}
+		elseif (array_key_exists($name, $props)) {
+			$return = $this->$name;
+		}
+		// host -> ihost
+		elseif (($prop = 'i' . $name) && array_key_exists($prop, $props)) {
+			$name = $prop;
+			$return = $this->$prop;
+		}
+		// ischeme -> scheme
+		elseif (($prop = substr($name, 1)) && array_key_exists($prop, $props)) {
+			$name = $prop;
+			$return = $this->$prop;
+		}
+		else {
+			trigger_error('Undefined property: ' . get_class($this) . '::' . $name, E_USER_NOTICE);
+			$return = null;
+		}
+
+		if ($return === null && isset($this->normalization[$this->scheme][$name])) {
+			return $this->normalization[$this->scheme][$name];
+		}
+		else {
+			return $return;
+		}
+	}
+
+	/**
+	 * Overload __isset() to provide access via properties
+	 *
+	 * @param string $name Property name
+	 * @return bool
+	 */
+	public function __isset($name) {
+		return (method_exists($this, 'get_' . $name) || isset($this->$name));
+	}
+
+	/**
+	 * Overload __unset() to provide access via properties
+	 *
+	 * @param string $name Property name
+	 */
+	public function __unset($name) {
+		if (method_exists($this, 'set_' . $name)) {
+			call_user_func(array($this, 'set_' . $name), '');
+		}
+	}
+
+	/**
+	 * Create a new IRI object, from a specified string
+	 *
+	 * @param string|Stringable|null $iri
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $iri argument is not a string, Stringable or null.
+	 */
+	public function __construct($iri = null) {
+		if ($iri !== null && InputValidator::is_string_or_stringable($iri) === false) {
+			throw InvalidArgument::create(1, '$iri', 'string|Stringable|null', gettype($iri));
+		}
+
+		$this->set_iri($iri);
+	}
+
+	/**
+	 * Create a new IRI object by resolving a relative IRI
+	 *
+	 * Returns false if $base is not absolute, otherwise an IRI.
+	 *
+	 * @param \WpOrg\Requests\Iri|string $base (Absolute) Base IRI
+	 * @param \WpOrg\Requests\Iri|string $relative Relative IRI
+	 * @return \WpOrg\Requests\Iri|false
+	 */
+	public static function absolutize($base, $relative) {
+		if (!($relative instanceof self)) {
+			$relative = new self($relative);
+		}
+		if (!$relative->is_valid()) {
+			return false;
+		}
+		elseif ($relative->scheme !== null) {
+			return clone $relative;
+		}
+
+		if (!($base instanceof self)) {
+			$base = new self($base);
+		}
+		if ($base->scheme === null || !$base->is_valid()) {
+			return false;
+		}
+
+		if ($relative->get_iri() !== '') {
+			if ($relative->iuserinfo !== null || $relative->ihost !== null || $relative->port !== null) {
+				$target = clone $relative;
+				$target->scheme = $base->scheme;
+			}
+			else {
+				$target = new self;
+				$target->scheme = $base->scheme;
+				$target->iuserinfo = $base->iuserinfo;
+				$target->ihost = $base->ihost;
+				$target->port = $base->port;
+				if ($relative->ipath !== '') {
+					if ($relative->ipath[0] === '/') {
+						$target->ipath = $relative->ipath;
+					}
+					elseif (($base->iuserinfo !== null || $base->ihost !== null || $base->port !== null) && $base->ipath === '') {
+						$target->ipath = '/' . $relative->ipath;
+					}
+					elseif (($last_segment = strrpos($base->ipath, '/')) !== false) {
+						$target->ipath = substr($base->ipath, 0, $last_segment + 1) . $relative->ipath;
+					}
+					else {
+						$target->ipath = $relative->ipath;
+					}
+					$target->ipath = $target->remove_dot_segments($target->ipath);
+					$target->iquery = $relative->iquery;
+				}
+				else {
+					$target->ipath = $base->ipath;
+					if ($relative->iquery !== null) {
+						$target->iquery = $relative->iquery;
+					}
+					elseif ($base->iquery !== null) {
+						$target->iquery = $base->iquery;
+					}
+				}
+				$target->ifragment = $relative->ifragment;
+			}
+		}
+		else {
+			$target = clone $base;
+			$target->ifragment = null;
+		}
+		$target->scheme_normalization();
+		return $target;
+	}
+
+	/**
+	 * Parse an IRI into scheme/authority/path/query/fragment segments
+	 *
+	 * @param string $iri
+	 * @return array
+	 */
+	protected function parse_iri($iri) {
+		$iri = trim($iri, "\x20\x09\x0A\x0C\x0D");
+		$has_match = preg_match('/^((?P<scheme>[^:\/?#]+):)?(\/\/(?P<authority>[^\/?#]*))?(?P<path>[^?#]*)(\?(?P<query>[^#]*))?(#(?P<fragment>.*))?$/', $iri, $match);
+		if (!$has_match) {
+			throw new Exception('Cannot parse supplied IRI', 'iri.cannot_parse', $iri);
+		}
+
+		if ($match[1] === '') {
+			$match['scheme'] = null;
+		}
+		if (!isset($match[3]) || $match[3] === '') {
+			$match['authority'] = null;
+		}
+		if (!isset($match[5])) {
+			$match['path'] = '';
+		}
+		if (!isset($match[6]) || $match[6] === '') {
+			$match['query'] = null;
+		}
+		if (!isset($match[8]) || $match[8] === '') {
+			$match['fragment'] = null;
+		}
+		return $match;
+	}
+
+	/**
+	 * Remove dot segments from a path
+	 *
+	 * @param string $input
+	 * @return string
+	 */
+	protected function remove_dot_segments($input) {
+		$output = '';
+		while (strpos($input, './') !== false || strpos($input, '/.') !== false || $input === '.' || $input === '..') {
+			// A: If the input buffer begins with a prefix of "../" or "./",
+			// then remove that prefix from the input buffer; otherwise,
+			if (strpos($input, '../') === 0) {
+				$input = substr($input, 3);
+			}
+			elseif (strpos($input, './') === 0) {
+				$input = substr($input, 2);
+			}
+			// B: if the input buffer begins with a prefix of "/./" or "/.",
+			// where "." is a complete path segment, then replace that prefix
+			// with "/" in the input buffer; otherwise,
+			elseif (strpos($input, '/./') === 0) {
+				$input = substr($input, 2);
+			}
+			elseif ($input === '/.') {
+				$input = '/';
+			}
+			// C: if the input buffer begins with a prefix of "/../" or "/..",
+			// where ".." is a complete path segment, then replace that prefix
+			// with "/" in the input buffer and remove the last segment and its
+			// preceding "/" (if any) from the output buffer; otherwise,
+			elseif (strpos($input, '/../') === 0) {
+				$input = substr($input, 3);
+				$output = substr_replace($output, '', (strrpos($output, '/') ?: 0));
+			}
+			elseif ($input === '/..') {
+				$input = '/';
+				$output = substr_replace($output, '', (strrpos($output, '/') ?: 0));
+			}
+			// D: if the input buffer consists only of "." or "..", then remove
+			// that from the input buffer; otherwise,
+			elseif ($input === '.' || $input === '..') {
+				$input = '';
+			}
+			// E: move the first path segment in the input buffer to the end of
+			// the output buffer, including the initial "/" character (if any)
+			// and any subsequent characters up to, but not including, the next
+			// "/" character or the end of the input buffer
+			elseif (($pos = strpos($input, '/', 1)) !== false) {
+				$output .= substr($input, 0, $pos);
+				$input = substr_replace($input, '', 0, $pos);
+			}
+			else {
+				$output .= $input;
+				$input = '';
+			}
+		}
+		return $output . $input;
+	}
+
+	/**
+	 * Replace invalid character with percent encoding
+	 *
+	 * @param string $text Input string
+	 * @param string $extra_chars Valid characters not in iunreserved or
+	 *                            iprivate (this is ASCII-only)
+	 * @param bool $iprivate Allow iprivate
+	 * @return string
+	 */
+	protected function replace_invalid_with_pct_encoding($text, $extra_chars, $iprivate = false) {
+		// Normalize as many pct-encoded sections as possible
+		$text = preg_replace_callback('/(?:%[A-Fa-f0-9]{2})+/', array($this, 'remove_iunreserved_percent_encoded'), $text);
+
+		// Replace invalid percent characters
+		$text = preg_replace('/%(?![A-Fa-f0-9]{2})/', '%25', $text);
+
+		// Add unreserved and % to $extra_chars (the latter is safe because all
+		// pct-encoded sections are now valid).
+		$extra_chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~%';
+
+		// Now replace any bytes that aren't allowed with their pct-encoded versions
+		$position = 0;
+		$strlen = strlen($text);
+		while (($position += strspn($text, $extra_chars, $position)) < $strlen) {
+			$value = ord($text[$position]);
+
+			// Start position
+			$start = $position;
+
+			// By default we are valid
+			$valid = true;
+
+			// No one byte sequences are valid due to the while.
+			// Two byte sequence:
+			if (($value & 0xE0) === 0xC0) {
+				$character = ($value & 0x1F) << 6;
+				$length = 2;
+				$remaining = 1;
+			}
+			// Three byte sequence:
+			elseif (($value & 0xF0) === 0xE0) {
+				$character = ($value & 0x0F) << 12;
+				$length = 3;
+				$remaining = 2;
+			}
+			// Four byte sequence:
+			elseif (($value & 0xF8) === 0xF0) {
+				$character = ($value & 0x07) << 18;
+				$length = 4;
+				$remaining = 3;
+			}
+			// Invalid byte:
+			else {
+				$valid = false;
+				$length = 1;
+				$remaining = 0;
+			}
+
+			if ($remaining) {
+				if ($position + $length <= $strlen) {
+					for ($position++; $remaining; $position++) {
+						$value = ord($text[$position]);
+
+						// Check that the byte is valid, then add it to the character:
+						if (($value & 0xC0) === 0x80) {
+							$character |= ($value & 0x3F) << (--$remaining * 6);
+						}
+						// If it is invalid, count the sequence as invalid and reprocess the current byte:
+						else {
+							$valid = false;
+							$position--;
+							break;
+						}
+					}
+				}
+				else {
+					$position = $strlen - 1;
+					$valid = false;
+				}
+			}
+
+			// Percent encode anything invalid or not in ucschar
+			if (
+				// Invalid sequences
+				!$valid
+				// Non-shortest form sequences are invalid
+				|| $length > 1 && $character <= 0x7F
+				|| $length > 2 && $character <= 0x7FF
+				|| $length > 3 && $character <= 0xFFFF
+				// Outside of range of ucschar codepoints
+				// Noncharacters
+				|| ($character & 0xFFFE) === 0xFFFE
+				|| $character >= 0xFDD0 && $character <= 0xFDEF
+				|| (
+					// Everything else not in ucschar
+					   $character > 0xD7FF && $character < 0xF900
+					|| $character < 0xA0
+					|| $character > 0xEFFFD
+				)
+				&& (
+					// Everything not in iprivate, if it applies
+					   !$iprivate
+					|| $character < 0xE000
+					|| $character > 0x10FFFD
+				)
+			) {
+				// If we were a character, pretend we weren't, but rather an error.
+				if ($valid) {
+					$position--;
+				}
+
+				for ($j = $start; $j <= $position; $j++) {
+					$text = substr_replace($text, sprintf('%%%02X', ord($text[$j])), $j, 1);
+					$j += 2;
+					$position += 2;
+					$strlen += 2;
+				}
+			}
+		}
+
+		return $text;
+	}
+
+	/**
+	 * Callback function for preg_replace_callback.
+	 *
+	 * Removes sequences of percent encoded bytes that represent UTF-8
+	 * encoded characters in iunreserved
+	 *
+	 * @param array $regex_match PCRE match
+	 * @return string Replacement
+	 */
+	protected function remove_iunreserved_percent_encoded($regex_match) {
+		// As we just have valid percent encoded sequences we can just explode
+		// and ignore the first member of the returned array (an empty string).
+		$bytes = explode('%', $regex_match[0]);
+
+		// Initialize the new string (this is what will be returned) and that
+		// there are no bytes remaining in the current sequence (unsurprising
+		// at the first byte!).
+		$string = '';
+		$remaining = 0;
+
+		// Loop over each and every byte, and set $value to its value
+		for ($i = 1, $len = count($bytes); $i < $len; $i++) {
+			$value = hexdec($bytes[$i]);
+
+			// If we're the first byte of sequence:
+			if (!$remaining) {
+				// Start position
+				$start = $i;
+
+				// By default we are valid
+				$valid = true;
+
+				// One byte sequence:
+				if ($value <= 0x7F) {
+					$character = $value;
+					$length = 1;
+				}
+				// Two byte sequence:
+				elseif (($value & 0xE0) === 0xC0) {
+					$character = ($value & 0x1F) << 6;
+					$length = 2;
+					$remaining = 1;
+				}
+				// Three byte sequence:
+				elseif (($value & 0xF0) === 0xE0) {
+					$character = ($value & 0x0F) << 12;
+					$length = 3;
+					$remaining = 2;
+				}
+				// Four byte sequence:
+				elseif (($value & 0xF8) === 0xF0) {
+					$character = ($value & 0x07) << 18;
+					$length = 4;
+					$remaining = 3;
+				}
+				// Invalid byte:
+				else {
+					$valid = false;
+					$remaining = 0;
+				}
+			}
+			// Continuation byte:
+			else {
+				// Check that the byte is valid, then add it to the character:
+				if (($value & 0xC0) === 0x80) {
+					$remaining--;
+					$character |= ($value & 0x3F) << ($remaining * 6);
+				}
+				// If it is invalid, count the sequence as invalid and reprocess the current byte as the start of a sequence:
+				else {
+					$valid = false;
+					$remaining = 0;
+					$i--;
+				}
+			}
+
+			// If we've reached the end of the current byte sequence, append it to Unicode::$data
+			if (!$remaining) {
+				// Percent encode anything invalid or not in iunreserved
+				if (
+					// Invalid sequences
+					!$valid
+					// Non-shortest form sequences are invalid
+					|| $length > 1 && $character <= 0x7F
+					|| $length > 2 && $character <= 0x7FF
+					|| $length > 3 && $character <= 0xFFFF
+					// Outside of range of iunreserved codepoints
+					|| $character < 0x2D
+					|| $character > 0xEFFFD
+					// Noncharacters
+					|| ($character & 0xFFFE) === 0xFFFE
+					|| $character >= 0xFDD0 && $character <= 0xFDEF
+					// Everything else not in iunreserved (this is all BMP)
+					|| $character === 0x2F
+					|| $character > 0x39 && $character < 0x41
+					|| $character > 0x5A && $character < 0x61
+					|| $character > 0x7A && $character < 0x7E
+					|| $character > 0x7E && $character < 0xA0
+					|| $character > 0xD7FF && $character < 0xF900
+				) {
+					for ($j = $start; $j <= $i; $j++) {
+						$string .= '%' . strtoupper($bytes[$j]);
+					}
+				}
+				else {
+					for ($j = $start; $j <= $i; $j++) {
+						$string .= chr(hexdec($bytes[$j]));
+					}
+				}
+			}
+		}
+
+		// If we have any bytes left over they are invalid (i.e., we are
+		// mid-way through a multi-byte sequence)
+		if ($remaining) {
+			for ($j = $start; $j < $len; $j++) {
+				$string .= '%' . strtoupper($bytes[$j]);
+			}
+		}
+
+		return $string;
+	}
+
+	protected function scheme_normalization() {
+		if (isset($this->normalization[$this->scheme]['iuserinfo']) && $this->iuserinfo === $this->normalization[$this->scheme]['iuserinfo']) {
+			$this->iuserinfo = null;
+		}
+		if (isset($this->normalization[$this->scheme]['ihost']) && $this->ihost === $this->normalization[$this->scheme]['ihost']) {
+			$this->ihost = null;
+		}
+		if (isset($this->normalization[$this->scheme]['port']) && $this->port === $this->normalization[$this->scheme]['port']) {
+			$this->port = null;
+		}
+		if (isset($this->normalization[$this->scheme]['ipath']) && $this->ipath === $this->normalization[$this->scheme]['ipath']) {
+			$this->ipath = '';
+		}
+		if (isset($this->ihost) && empty($this->ipath)) {
+			$this->ipath = '/';
+		}
+		if (isset($this->normalization[$this->scheme]['iquery']) && $this->iquery === $this->normalization[$this->scheme]['iquery']) {
+			$this->iquery = null;
+		}
+		if (isset($this->normalization[$this->scheme]['ifragment']) && $this->ifragment === $this->normalization[$this->scheme]['ifragment']) {
+			$this->ifragment = null;
+		}
+	}
+
+	/**
+	 * Check if the object represents a valid IRI. This needs to be done on each
+	 * call as some things change depending on another part of the IRI.
+	 *
+	 * @return bool
+	 */
+	public function is_valid() {
+		$isauthority = $this->iuserinfo !== null || $this->ihost !== null || $this->port !== null;
+		if ($this->ipath !== '' &&
+			(
+				$isauthority && $this->ipath[0] !== '/' ||
+				(
+					$this->scheme === null &&
+					!$isauthority &&
+					strpos($this->ipath, ':') !== false &&
+					(strpos($this->ipath, '/') === false ? true : strpos($this->ipath, ':') < strpos($this->ipath, '/'))
+				)
+			)
+		) {
+			return false;
+		}
+
+		return true;
+	}
+
+	public function __wakeup() {
+		$class_props = get_class_vars( __CLASS__ );
+		$string_props = array( 'scheme', 'iuserinfo', 'ihost', 'port', 'ipath', 'iquery', 'ifragment' );
+		$array_props = array( 'normalization' );
+		foreach ( $class_props as $prop => $default_value ) {
+			if ( in_array( $prop, $string_props, true ) && ! is_string( $this->$prop ) ) {
+				throw new UnexpectedValueException();
+			} elseif ( in_array( $prop, $array_props, true ) && ! is_array( $this->$prop ) ) {
+				throw new UnexpectedValueException();
+			}
+			$this->$prop = null;
+		}
+	}
+
+	/**
+	 * Set the entire IRI. Returns true on success, false on failure (if there
+	 * are any invalid characters).
+	 *
+	 * @param string $iri
+	 * @return bool
+	 */
+	protected function set_iri($iri) {
+		static $cache;
+		if (!$cache) {
+			$cache = array();
+		}
+
+		if ($iri === null) {
+			return true;
+		}
+
+		$iri = (string) $iri;
+
+		if (isset($cache[$iri])) {
+			list($this->scheme,
+				 $this->iuserinfo,
+				 $this->ihost,
+				 $this->port,
+				 $this->ipath,
+				 $this->iquery,
+				 $this->ifragment,
+				 $return) = $cache[$iri];
+			return $return;
+		}
+
+		$parsed = $this->parse_iri($iri);
+
+		$return = $this->set_scheme($parsed['scheme'])
+			&& $this->set_authority($parsed['authority'])
+			&& $this->set_path($parsed['path'])
+			&& $this->set_query($parsed['query'])
+			&& $this->set_fragment($parsed['fragment']);
+
+		$cache[$iri] = array($this->scheme,
+							 $this->iuserinfo,
+							 $this->ihost,
+							 $this->port,
+							 $this->ipath,
+							 $this->iquery,
+							 $this->ifragment,
+							 $return);
+		return $return;
+	}
+
+	/**
+	 * Set the scheme. Returns true on success, false on failure (if there are
+	 * any invalid characters).
+	 *
+	 * @param string $scheme
+	 * @return bool
+	 */
+	protected function set_scheme($scheme) {
+		if ($scheme === null) {
+			$this->scheme = null;
+		}
+		elseif (!preg_match('/^[A-Za-z][0-9A-Za-z+\-.]*$/', $scheme)) {
+			$this->scheme = null;
+			return false;
+		}
+		else {
+			$this->scheme = strtolower($scheme);
+		}
+		return true;
+	}
+
+	/**
+	 * Set the authority. Returns true on success, false on failure (if there are
+	 * any invalid characters).
+	 *
+	 * @param string $authority
+	 * @return bool
+	 */
+	protected function set_authority($authority) {
+		static $cache;
+		if (!$cache) {
+			$cache = array();
+		}
+
+		if ($authority === null) {
+			$this->iuserinfo = null;
+			$this->ihost = null;
+			$this->port = null;
+			return true;
+		}
+		if (isset($cache[$authority])) {
+			list($this->iuserinfo,
+				 $this->ihost,
+				 $this->port,
+				 $return) = $cache[$authority];
+
+			return $return;
+		}
+
+		$remaining = $authority;
+		if (($iuserinfo_end = strrpos($remaining, '@')) !== false) {
+			$iuserinfo = substr($remaining, 0, $iuserinfo_end);
+			$remaining = substr($remaining, $iuserinfo_end + 1);
+		}
+		else {
+			$iuserinfo = null;
+		}
+
+		if (($port_start = strpos($remaining, ':', (strpos($remaining, ']') ?: 0))) !== false) {
+			$port = substr($remaining, $port_start + 1);
+			if ($port === false || $port === '') {
+				$port = null;
+			}
+			$remaining = substr($remaining, 0, $port_start);
+		}
+		else {
+			$port = null;
+		}
+
+		$return = $this->set_userinfo($iuserinfo) &&
+				  $this->set_host($remaining) &&
+				  $this->set_port($port);
+
+		$cache[$authority] = array($this->iuserinfo,
+								   $this->ihost,
+								   $this->port,
+								   $return);
+
+		return $return;
+	}
+
+	/**
+	 * Set the iuserinfo.
+	 *
+	 * @param string $iuserinfo
+	 * @return bool
+	 */
+	protected function set_userinfo($iuserinfo) {
+		if ($iuserinfo === null) {
+			$this->iuserinfo = null;
+		}
+		else {
+			$this->iuserinfo = $this->replace_invalid_with_pct_encoding($iuserinfo, '!$&\'()*+,;=:');
+			$this->scheme_normalization();
+		}
+
+		return true;
+	}
+
+	/**
+	 * Set the ihost. Returns true on success, false on failure (if there are
+	 * any invalid characters).
+	 *
+	 * @param string $ihost
+	 * @return bool
+	 */
+	protected function set_host($ihost) {
+		if ($ihost === null) {
+			$this->ihost = null;
+			return true;
+		}
+		if (substr($ihost, 0, 1) === '[' && substr($ihost, -1) === ']') {
+			if (Ipv6::check_ipv6(substr($ihost, 1, -1))) {
+				$this->ihost = '[' . Ipv6::compress(substr($ihost, 1, -1)) . ']';
+			}
+			else {
+				$this->ihost = null;
+				return false;
+			}
+		}
+		else {
+			$ihost = $this->replace_invalid_with_pct_encoding($ihost, '!$&\'()*+,;=');
+
+			// Lowercase, but ignore pct-encoded sections (as they should
+			// remain uppercase). This must be done after the previous step
+			// as that can add unescaped characters.
+			$position = 0;
+			$strlen = strlen($ihost);
+			while (($position += strcspn($ihost, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ%', $position)) < $strlen) {
+				if ($ihost[$position] === '%') {
+					$position += 3;
+				}
+				else {
+					$ihost[$position] = strtolower($ihost[$position]);
+					$position++;
+				}
+			}
+
+			$this->ihost = $ihost;
+		}
+
+		$this->scheme_normalization();
+
+		return true;
+	}
+
+	/**
+	 * Set the port. Returns true on success, false on failure (if there are
+	 * any invalid characters).
+	 *
+	 * @param string $port
+	 * @return bool
+	 */
+	protected function set_port($port) {
+		if ($port === null) {
+			$this->port = null;
+			return true;
+		}
+
+		if (strspn($port, '0123456789') === strlen($port)) {
+			$this->port = (int) $port;
+			$this->scheme_normalization();
+			return true;
+		}
+
+		$this->port = null;
+		return false;
+	}
+
+	/**
+	 * Set the ipath.
+	 *
+	 * @param string $ipath
+	 * @return bool
+	 */
+	protected function set_path($ipath) {
+		static $cache;
+		if (!$cache) {
+			$cache = array();
+		}
+
+		$ipath = (string) $ipath;
+
+		if (isset($cache[$ipath])) {
+			$this->ipath = $cache[$ipath][(int) ($this->scheme !== null)];
+		}
+		else {
+			$valid = $this->replace_invalid_with_pct_encoding($ipath, '!$&\'()*+,;=@:/');
+			$removed = $this->remove_dot_segments($valid);
+
+			$cache[$ipath] = array($valid, $removed);
+			$this->ipath = ($this->scheme !== null) ? $removed : $valid;
+		}
+		$this->scheme_normalization();
+		return true;
+	}
+
+	/**
+	 * Set the iquery.
+	 *
+	 * @param string $iquery
+	 * @return bool
+	 */
+	protected function set_query($iquery) {
+		if ($iquery === null) {
+			$this->iquery = null;
+		}
+		else {
+			$this->iquery = $this->replace_invalid_with_pct_encoding($iquery, '!$&\'()*+,;=:@/?', true);
+			$this->scheme_normalization();
+		}
+		return true;
+	}
+
+	/**
+	 * Set the ifragment.
+	 *
+	 * @param string $ifragment
+	 * @return bool
+	 */
+	protected function set_fragment($ifragment) {
+		if ($ifragment === null) {
+			$this->ifragment = null;
+		}
+		else {
+			$this->ifragment = $this->replace_invalid_with_pct_encoding($ifragment, '!$&\'()*+,;=:@/?');
+			$this->scheme_normalization();
+		}
+		return true;
+	}
+
+	/**
+	 * Convert an IRI to a URI (or parts thereof)
+	 *
+	 * @param string|bool $iri IRI to convert (or false from {@see \WpOrg\Requests\Iri::get_iri()})
+	 * @return string|false URI if IRI is valid, false otherwise.
+	 */
+	protected function to_uri($iri) {
+		if (!is_string($iri)) {
+			return false;
+		}
+
+		static $non_ascii;
+		if (!$non_ascii) {
+			$non_ascii = implode('', range("\x80", "\xFF"));
+		}
+
+		$position = 0;
+		$strlen = strlen($iri);
+		while (($position += strcspn($iri, $non_ascii, $position)) < $strlen) {
+			$iri = substr_replace($iri, sprintf('%%%02X', ord($iri[$position])), $position, 1);
+			$position += 3;
+			$strlen += 2;
+		}
+
+		return $iri;
+	}
+
+	/**
+	 * Get the complete IRI
+	 *
+	 * @return string|false
+	 */
+	protected function get_iri() {
+		if (!$this->is_valid()) {
+			return false;
+		}
+
+		$iri = '';
+		if ($this->scheme !== null) {
+			$iri .= $this->scheme . ':';
+		}
+		if (($iauthority = $this->get_iauthority()) !== null) {
+			$iri .= '//' . $iauthority;
+		}
+		$iri .= $this->ipath;
+		if ($this->iquery !== null) {
+			$iri .= '?' . $this->iquery;
+		}
+		if ($this->ifragment !== null) {
+			$iri .= '#' . $this->ifragment;
+		}
+
+		return $iri;
+	}
+
+	/**
+	 * Get the complete URI
+	 *
+	 * @return string
+	 */
+	protected function get_uri() {
+		return $this->to_uri($this->get_iri());
+	}
+
+	/**
+	 * Get the complete iauthority
+	 *
+	 * @return string|null
+	 */
+	protected function get_iauthority() {
+		if ($this->iuserinfo === null && $this->ihost === null && $this->port === null) {
+			return null;
+		}
+
+		$iauthority = '';
+		if ($this->iuserinfo !== null) {
+			$iauthority .= $this->iuserinfo . '@';
+		}
+		if ($this->ihost !== null) {
+			$iauthority .= $this->ihost;
+		}
+		if ($this->port !== null) {
+			$iauthority .= ':' . $this->port;
+		}
+		return $iauthority;
+	}
+
+	/**
+	 * Get the complete authority
+	 *
+	 * @return string
+	 */
+	protected function get_authority() {
+		$iauthority = $this->get_iauthority();
+		if (is_string($iauthority)) {
+			return $this->to_uri($iauthority);
+		}
+		else {
+			return $iauthority;
+		}
+	}
+}
diff --git a/wp-includes/Requests/src/Port.php b/wp-includes/Requests/src/Port.php
new file mode 100644
index 0000000..5545409
--- /dev/null
+++ b/wp-includes/Requests/src/Port.php
@@ -0,0 +1,75 @@
+<?php
+/**
+ * Port utilities for Requests
+ *
+ * @package Requests\Utilities
+ * @since   2.0.0
+ */
+
+namespace WpOrg\Requests;
+
+use WpOrg\Requests\Exception;
+use WpOrg\Requests\Exception\InvalidArgument;
+
+/**
+ * Find the correct port depending on the Request type.
+ *
+ * @package Requests\Utilities
+ * @since   2.0.0
+ */
+final class Port {
+
+	/**
+	 * Port to use with Acap requests.
+	 *
+	 * @var int
+	 */
+	const ACAP = 674;
+
+	/**
+	 * Port to use with Dictionary requests.
+	 *
+	 * @var int
+	 */
+	const DICT = 2628;
+
+	/**
+	 * Port to use with HTTP requests.
+	 *
+	 * @var int
+	 */
+	const HTTP = 80;
+
+	/**
+	 * Port to use with HTTP over SSL requests.
+	 *
+	 * @var int
+	 */
+	const HTTPS = 443;
+
+	/**
+	 * Retrieve the port number to use.
+	 *
+	 * @param string $type Request type.
+	 *                     The following requests types are supported:
+	 *                     'acap', 'dict', 'http' and 'https'.
+	 *
+	 * @return int
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When a non-string input has been passed.
+	 * @throws \WpOrg\Requests\Exception                 When a non-supported port is requested ('portnotsupported').
+	 */
+	public static function get($type) {
+		if (!is_string($type)) {
+			throw InvalidArgument::create(1, '$type', 'string', gettype($type));
+		}
+
+		$type = strtoupper($type);
+		if (!defined("self::{$type}")) {
+			$message = sprintf('Invalid port type (%s) passed', $type);
+			throw new Exception($message, 'portnotsupported');
+		}
+
+		return constant("self::{$type}");
+	}
+}
diff --git a/wp-includes/Requests/src/Proxy.php b/wp-includes/Requests/src/Proxy.php
new file mode 100644
index 0000000..18797a2
--- /dev/null
+++ b/wp-includes/Requests/src/Proxy.php
@@ -0,0 +1,38 @@
+<?php
+/**
+ * Proxy connection interface
+ *
+ * @package Requests\Proxy
+ * @since   1.6
+ */
+
+namespace WpOrg\Requests;
+
+use WpOrg\Requests\Hooks;
+
+/**
+ * Proxy connection interface
+ *
+ * Implement this interface to handle proxy settings and authentication
+ *
+ * Parameters should be passed via the constructor where possible, as this
+ * makes it much easier for users to use your provider.
+ *
+ * @see \WpOrg\Requests\Hooks
+ *
+ * @package Requests\Proxy
+ * @since   1.6
+ */
+interface Proxy {
+	/**
+	 * Register hooks as needed
+	 *
+	 * This method is called in {@see \WpOrg\Requests\Requests::request()} when the user
+	 * has set an instance as the 'auth' option. Use this callback to register all the
+	 * hooks you'll need.
+	 *
+	 * @see \WpOrg\Requests\Hooks::register()
+	 * @param \WpOrg\Requests\Hooks $hooks Hook system
+	 */
+	public function register(Hooks $hooks);
+}
diff --git a/wp-includes/Requests/src/Proxy/Http.php b/wp-includes/Requests/src/Proxy/Http.php
new file mode 100644
index 0000000..e553c9c
--- /dev/null
+++ b/wp-includes/Requests/src/Proxy/Http.php
@@ -0,0 +1,164 @@
+<?php
+/**
+ * HTTP Proxy connection interface
+ *
+ * @package Requests\Proxy
+ * @since   1.6
+ */
+
+namespace WpOrg\Requests\Proxy;
+
+use WpOrg\Requests\Exception\ArgumentCount;
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Hooks;
+use WpOrg\Requests\Proxy;
+
+/**
+ * HTTP Proxy connection interface
+ *
+ * Provides a handler for connection via an HTTP proxy
+ *
+ * @package Requests\Proxy
+ * @since   1.6
+ */
+final class Http implements Proxy {
+	/**
+	 * Proxy host and port
+	 *
+	 * Notation: "host:port" (eg 127.0.0.1:8080 or someproxy.com:3128)
+	 *
+	 * @var string
+	 */
+	public $proxy;
+
+	/**
+	 * Username
+	 *
+	 * @var string
+	 */
+	public $user;
+
+	/**
+	 * Password
+	 *
+	 * @var string
+	 */
+	public $pass;
+
+	/**
+	 * Do we need to authenticate? (ie username & password have been provided)
+	 *
+	 * @var boolean
+	 */
+	public $use_authentication;
+
+	/**
+	 * Constructor
+	 *
+	 * @since 1.6
+	 *
+	 * @param array|string|null $args Proxy as a string or an array of proxy, user and password.
+	 *                                When passed as an array, must have exactly one (proxy)
+	 *                                or three elements (proxy, user, password).
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not an array, a string or null.
+	 * @throws \WpOrg\Requests\Exception\ArgumentCount On incorrect number of arguments (`proxyhttpbadargs`)
+	 */
+	public function __construct($args = null) {
+		if (is_string($args)) {
+			$this->proxy = $args;
+		} elseif (is_array($args)) {
+			if (count($args) === 1) {
+				list($this->proxy) = $args;
+			} elseif (count($args) === 3) {
+				list($this->proxy, $this->user, $this->pass) = $args;
+				$this->use_authentication                    = true;
+			} else {
+				throw ArgumentCount::create(
+					'an array with exactly one element or exactly three elements',
+					count($args),
+					'proxyhttpbadargs'
+				);
+			}
+		} elseif ($args !== null) {
+			throw InvalidArgument::create(1, '$args', 'array|string|null', gettype($args));
+		}
+	}
+
+	/**
+	 * Register the necessary callbacks
+	 *
+	 * @since 1.6
+	 * @see \WpOrg\Requests\Proxy\Http::curl_before_send()
+	 * @see \WpOrg\Requests\Proxy\Http::fsockopen_remote_socket()
+	 * @see \WpOrg\Requests\Proxy\Http::fsockopen_remote_host_path()
+	 * @see \WpOrg\Requests\Proxy\Http::fsockopen_header()
+	 * @param \WpOrg\Requests\Hooks $hooks Hook system
+	 */
+	public function register(Hooks $hooks) {
+		$hooks->register('curl.before_send', [$this, 'curl_before_send']);
+
+		$hooks->register('fsockopen.remote_socket', [$this, 'fsockopen_remote_socket']);
+		$hooks->register('fsockopen.remote_host_path', [$this, 'fsockopen_remote_host_path']);
+		if ($this->use_authentication) {
+			$hooks->register('fsockopen.after_headers', [$this, 'fsockopen_header']);
+		}
+	}
+
+	/**
+	 * Set cURL parameters before the data is sent
+	 *
+	 * @since 1.6
+	 * @param resource|\CurlHandle $handle cURL handle
+	 */
+	public function curl_before_send(&$handle) {
+		curl_setopt($handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
+		curl_setopt($handle, CURLOPT_PROXY, $this->proxy);
+
+		if ($this->use_authentication) {
+			curl_setopt($handle, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
+			curl_setopt($handle, CURLOPT_PROXYUSERPWD, $this->get_auth_string());
+		}
+	}
+
+	/**
+	 * Alter remote socket information before opening socket connection
+	 *
+	 * @since 1.6
+	 * @param string $remote_socket Socket connection string
+	 */
+	public function fsockopen_remote_socket(&$remote_socket) {
+		$remote_socket = $this->proxy;
+	}
+
+	/**
+	 * Alter remote path before getting stream data
+	 *
+	 * @since 1.6
+	 * @param string $path Path to send in HTTP request string ("GET ...")
+	 * @param string $url Full URL we're requesting
+	 */
+	public function fsockopen_remote_host_path(&$path, $url) {
+		$path = $url;
+	}
+
+	/**
+	 * Add extra headers to the request before sending
+	 *
+	 * @since 1.6
+	 * @param string $out HTTP header string
+	 */
+	public function fsockopen_header(&$out) {
+		$out .= sprintf("Proxy-Authorization: Basic %s\r\n", base64_encode($this->get_auth_string()));
+	}
+
+	/**
+	 * Get the authentication string (user:pass)
+	 *
+	 * @since 1.6
+	 * @return string
+	 */
+	public function get_auth_string() {
+		return $this->user . ':' . $this->pass;
+	}
+}
diff --git a/wp-includes/Requests/src/Requests.php b/wp-includes/Requests/src/Requests.php
new file mode 100644
index 0000000..bb5292a
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+++ b/wp-includes/Requests/src/Requests.php
@@ -0,0 +1,1099 @@
+<?php
+/**
+ * Requests for PHP
+ *
+ * Inspired by Requests for Python.
+ *
+ * Based on concepts from SimplePie_File, RequestCore and WP_Http.
+ *
+ * @package Requests
+ */
+
+namespace WpOrg\Requests;
+
+use WpOrg\Requests\Auth\Basic;
+use WpOrg\Requests\Capability;
+use WpOrg\Requests\Cookie\Jar;
+use WpOrg\Requests\Exception;
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Hooks;
+use WpOrg\Requests\IdnaEncoder;
+use WpOrg\Requests\Iri;
+use WpOrg\Requests\Proxy\Http;
+use WpOrg\Requests\Response;
+use WpOrg\Requests\Transport\Curl;
+use WpOrg\Requests\Transport\Fsockopen;
+use WpOrg\Requests\Utility\InputValidator;
+
+/**
+ * Requests for PHP
+ *
+ * Inspired by Requests for Python.
+ *
+ * Based on concepts from SimplePie_File, RequestCore and WP_Http.
+ *
+ * @package Requests
+ */
+class Requests {
+	/**
+	 * POST method
+	 *
+	 * @var string
+	 */
+	const POST = 'POST';
+
+	/**
+	 * PUT method
+	 *
+	 * @var string
+	 */
+	const PUT = 'PUT';
+
+	/**
+	 * GET method
+	 *
+	 * @var string
+	 */
+	const GET = 'GET';
+
+	/**
+	 * HEAD method
+	 *
+	 * @var string
+	 */
+	const HEAD = 'HEAD';
+
+	/**
+	 * DELETE method
+	 *
+	 * @var string
+	 */
+	const DELETE = 'DELETE';
+
+	/**
+	 * OPTIONS method
+	 *
+	 * @var string
+	 */
+	const OPTIONS = 'OPTIONS';
+
+	/**
+	 * TRACE method
+	 *
+	 * @var string
+	 */
+	const TRACE = 'TRACE';
+
+	/**
+	 * PATCH method
+	 *
+	 * @link https://tools.ietf.org/html/rfc5789
+	 * @var string
+	 */
+	const PATCH = 'PATCH';
+
+	/**
+	 * Default size of buffer size to read streams
+	 *
+	 * @var integer
+	 */
+	const BUFFER_SIZE = 1160;
+
+	/**
+	 * Option defaults.
+	 *
+	 * @see \WpOrg\Requests\Requests::get_default_options()
+	 * @see \WpOrg\Requests\Requests::request() for values returned by this method
+	 *
+	 * @since 2.0.0
+	 *
+	 * @var array
+	 */
+	const OPTION_DEFAULTS = [
+		'timeout'          => 10,
+		'connect_timeout'  => 10,
+		'useragent'        => 'php-requests/' . self::VERSION,
+		'protocol_version' => 1.1,
+		'redirected'       => 0,
+		'redirects'        => 10,
+		'follow_redirects' => true,
+		'blocking'         => true,
+		'type'             => self::GET,
+		'filename'         => false,
+		'auth'             => false,
+		'proxy'            => false,
+		'cookies'          => false,
+		'max_bytes'        => false,
+		'idn'              => true,
+		'hooks'            => null,
+		'transport'        => null,
+		'verify'           => null,
+		'verifyname'       => true,
+	];
+
+	/**
+	 * Default supported Transport classes.
+	 *
+	 * @since 2.0.0
+	 *
+	 * @var array
+	 */
+	const DEFAULT_TRANSPORTS = [
+		Curl::class      => Curl::class,
+		Fsockopen::class => Fsockopen::class,
+	];
+
+	/**
+	 * Current version of Requests
+	 *
+	 * @var string
+	 */
+	const VERSION = '2.0.9';
+
+	/**
+	 * Selected transport name
+	 *
+	 * Use {@see \WpOrg\Requests\Requests::get_transport()} instead
+	 *
+	 * @var array
+	 */
+	public static $transport = [];
+
+	/**
+	 * Registered transport classes
+	 *
+	 * @var array
+	 */
+	protected static $transports = [];
+
+	/**
+	 * Default certificate path.
+	 *
+	 * @see \WpOrg\Requests\Requests::get_certificate_path()
+	 * @see \WpOrg\Requests\Requests::set_certificate_path()
+	 *
+	 * @var string
+	 */
+	protected static $certificate_path = __DIR__ . '/../certificates/cacert.pem';
+
+	/**
+	 * All (known) valid deflate, gzip header magic markers.
+	 *
+	 * These markers relate to different compression levels.
+	 *
+	 * @link https://stackoverflow.com/a/43170354/482864 Marker source.
+	 *
+	 * @since 2.0.0
+	 *
+	 * @var array
+	 */
+	private static $magic_compression_headers = [
+		"\x1f\x8b" => true, // Gzip marker.
+		"\x78\x01" => true, // Zlib marker - level 1.
+		"\x78\x5e" => true, // Zlib marker - level 2 to 5.
+		"\x78\x9c" => true, // Zlib marker - level 6.
+		"\x78\xda" => true, // Zlib marker - level 7 to 9.
+	];
+
+	/**
+	 * This is a static class, do not instantiate it
+	 *
+	 * @codeCoverageIgnore
+	 */
+	private function __construct() {}
+
+	/**
+	 * Register a transport
+	 *
+	 * @param string $transport Transport class to add, must support the \WpOrg\Requests\Transport interface
+	 */
+	public static function add_transport($transport) {
+		if (empty(self::$transports)) {
+			self::$transports = self::DEFAULT_TRANSPORTS;
+		}
+
+		self::$transports[$transport] = $transport;
+	}
+
+	/**
+	 * Get the fully qualified class name (FQCN) for a working transport.
+	 *
+	 * @param array<string, bool> $capabilities Optional. Associative array of capabilities to test against, i.e. `['<capability>' => true]`.
+	 * @return string FQCN of the transport to use, or an empty string if no transport was
+	 *                found which provided the requested capabilities.
+	 */
+	protected static function get_transport_class(array $capabilities = []) {
+		// Caching code, don't bother testing coverage.
+		// @codeCoverageIgnoreStart
+		// Array of capabilities as a string to be used as an array key.
+		ksort($capabilities);
+		$cap_string = serialize($capabilities);
+
+		// Don't search for a transport if it's already been done for these $capabilities.
+		if (isset(self::$transport[$cap_string])) {
+			return self::$transport[$cap_string];
+		}
+
+		// Ensure we will not run this same check again later on.
+		self::$transport[$cap_string] = '';
+		// @codeCoverageIgnoreEnd
+
+		if (empty(self::$transports)) {
+			self::$transports = self::DEFAULT_TRANSPORTS;
+		}
+
+		// Find us a working transport.
+		foreach (self::$transports as $class) {
+			if (!class_exists($class)) {
+				continue;
+			}
+
+			$result = $class::test($capabilities);
+			if ($result === true) {
+				self::$transport[$cap_string] = $class;
+				break;
+			}
+		}
+
+		return self::$transport[$cap_string];
+	}
+
+	/**
+	 * Get a working transport.
+	 *
+	 * @param array<string, bool> $capabilities Optional. Associative array of capabilities to test against, i.e. `['<capability>' => true]`.
+	 * @return \WpOrg\Requests\Transport
+	 * @throws \WpOrg\Requests\Exception If no valid transport is found (`notransport`).
+	 */
+	protected static function get_transport(array $capabilities = []) {
+		$class = self::get_transport_class($capabilities);
+
+		if ($class === '') {
+			throw new Exception('No working transports found', 'notransport', self::$transports);
+		}
+
+		return new $class();
+	}
+
+	/**
+	 * Checks to see if we have a transport for the capabilities requested.
+	 *
+	 * Supported capabilities can be found in the {@see \WpOrg\Requests\Capability}
+	 * interface as constants.
+	 *
+	 * Example usage:
+	 * `Requests::has_capabilities([Capability::SSL => true])`.
+	 *
+	 * @param array<string, bool> $capabilities Optional. Associative array of capabilities to test against, i.e. `['<capability>' => true]`.
+	 * @return bool Whether the transport has the requested capabilities.
+	 */
+	public static function has_capabilities(array $capabilities = []) {
+		return self::get_transport_class($capabilities) !== '';
+	}
+
+	/**#@+
+	 * @see \WpOrg\Requests\Requests::request()
+	 * @param string $url
+	 * @param array $headers
+	 * @param array $options
+	 * @return \WpOrg\Requests\Response
+	 */
+	/**
+	 * Send a GET request
+	 */
+	public static function get($url, $headers = [], $options = []) {
+		return self::request($url, $headers, null, self::GET, $options);
+	}
+
+	/**
+	 * Send a HEAD request
+	 */
+	public static function head($url, $headers = [], $options = []) {
+		return self::request($url, $headers, null, self::HEAD, $options);
+	}
+
+	/**
+	 * Send a DELETE request
+	 */
+	public static function delete($url, $headers = [], $options = []) {
+		return self::request($url, $headers, null, self::DELETE, $options);
+	}
+
+	/**
+	 * Send a TRACE request
+	 */
+	public static function trace($url, $headers = [], $options = []) {
+		return self::request($url, $headers, null, self::TRACE, $options);
+	}
+	/**#@-*/
+
+	/**#@+
+	 * @see \WpOrg\Requests\Requests::request()
+	 * @param string $url
+	 * @param array $headers
+	 * @param array $data
+	 * @param array $options
+	 * @return \WpOrg\Requests\Response
+	 */
+	/**
+	 * Send a POST request
+	 */
+	public static function post($url, $headers = [], $data = [], $options = []) {
+		return self::request($url, $headers, $data, self::POST, $options);
+	}
+	/**
+	 * Send a PUT request
+	 */
+	public static function put($url, $headers = [], $data = [], $options = []) {
+		return self::request($url, $headers, $data, self::PUT, $options);
+	}
+
+	/**
+	 * Send an OPTIONS request
+	 */
+	public static function options($url, $headers = [], $data = [], $options = []) {
+		return self::request($url, $headers, $data, self::OPTIONS, $options);
+	}
+
+	/**
+	 * Send a PATCH request
+	 *
+	 * Note: Unlike {@see \WpOrg\Requests\Requests::post()} and {@see \WpOrg\Requests\Requests::put()},
+	 * `$headers` is required, as the specification recommends that should send an ETag
+	 *
+	 * @link https://tools.ietf.org/html/rfc5789
+	 */
+	public static function patch($url, $headers, $data = [], $options = []) {
+		return self::request($url, $headers, $data, self::PATCH, $options);
+	}
+	/**#@-*/
+
+	/**
+	 * Main interface for HTTP requests
+	 *
+	 * This method initiates a request and sends it via a transport before
+	 * parsing.
+	 *
+	 * The `$options` parameter takes an associative array with the following
+	 * options:
+	 *
+	 * - `timeout`: How long should we wait for a response?
+	 *    Note: for cURL, a minimum of 1 second applies, as DNS resolution
+	 *    operates at second-resolution only.
+	 *    (float, seconds with a millisecond precision, default: 10, example: 0.01)
+	 * - `connect_timeout`: How long should we wait while trying to connect?
+	 *    (float, seconds with a millisecond precision, default: 10, example: 0.01)
+	 * - `useragent`: Useragent to send to the server
+	 *    (string, default: php-requests/$version)
+	 * - `follow_redirects`: Should we follow 3xx redirects?
+	 *    (boolean, default: true)
+	 * - `redirects`: How many times should we redirect before erroring?
+	 *    (integer, default: 10)
+	 * - `blocking`: Should we block processing on this request?
+	 *    (boolean, default: true)
+	 * - `filename`: File to stream the body to instead.
+	 *    (string|boolean, default: false)
+	 * - `auth`: Authentication handler or array of user/password details to use
+	 *    for Basic authentication
+	 *    (\WpOrg\Requests\Auth|array|boolean, default: false)
+	 * - `proxy`: Proxy details to use for proxy by-passing and authentication
+	 *    (\WpOrg\Requests\Proxy|array|string|boolean, default: false)
+	 * - `max_bytes`: Limit for the response body size.
+	 *    (integer|boolean, default: false)
+	 * - `idn`: Enable IDN parsing
+	 *    (boolean, default: true)
+	 * - `transport`: Custom transport. Either a class name, or a
+	 *    transport object. Defaults to the first working transport from
+	 *    {@see \WpOrg\Requests\Requests::getTransport()}
+	 *    (string|\WpOrg\Requests\Transport, default: {@see \WpOrg\Requests\Requests::getTransport()})
+	 * - `hooks`: Hooks handler.
+	 *    (\WpOrg\Requests\HookManager, default: new WpOrg\Requests\Hooks())
+	 * - `verify`: Should we verify SSL certificates? Allows passing in a custom
+	 *    certificate file as a string. (Using true uses the system-wide root
+	 *    certificate store instead, but this may have different behaviour
+	 *    across transports.)
+	 *    (string|boolean, default: certificates/cacert.pem)
+	 * - `verifyname`: Should we verify the common name in the SSL certificate?
+	 *    (boolean, default: true)
+	 * - `data_format`: How should we send the `$data` parameter?
+	 *    (string, one of 'query' or 'body', default: 'query' for
+	 *    HEAD/GET/DELETE, 'body' for POST/PUT/OPTIONS/PATCH)
+	 *
+	 * @param string|Stringable $url URL to request
+	 * @param array $headers Extra headers to send with the request
+	 * @param array|null $data Data to send either as a query string for GET/HEAD requests, or in the body for POST requests
+	 * @param string $type HTTP request type (use Requests constants)
+	 * @param array $options Options for the request (see description for more information)
+	 * @return \WpOrg\Requests\Response
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $url argument is not a string or Stringable.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $type argument is not a string.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $options argument is not an array.
+	 * @throws \WpOrg\Requests\Exception On invalid URLs (`nonhttp`)
+	 */
+	public static function request($url, $headers = [], $data = [], $type = self::GET, $options = []) {
+		if (InputValidator::is_string_or_stringable($url) === false) {
+			throw InvalidArgument::create(1, '$url', 'string|Stringable', gettype($url));
+		}
+
+		if (is_string($type) === false) {
+			throw InvalidArgument::create(4, '$type', 'string', gettype($type));
+		}
+
+		if (is_array($options) === false) {
+			throw InvalidArgument::create(5, '$options', 'array', gettype($options));
+		}
+
+		if (empty($options['type'])) {
+			$options['type'] = $type;
+		}
+
+		$options = array_merge(self::get_default_options(), $options);
+
+		self::set_defaults($url, $headers, $data, $type, $options);
+
+		$options['hooks']->dispatch('requests.before_request', [&$url, &$headers, &$data, &$type, &$options]);
+
+		if (!empty($options['transport'])) {
+			$transport = $options['transport'];
+
+			if (is_string($options['transport'])) {
+				$transport = new $transport();
+			}
+		} else {
+			$need_ssl     = (stripos($url, 'https://') === 0);
+			$capabilities = [Capability::SSL => $need_ssl];
+			$transport    = self::get_transport($capabilities);
+		}
+
+		$response = $transport->request($url, $headers, $data, $options);
+
+		$options['hooks']->dispatch('requests.before_parse', [&$response, $url, $headers, $data, $type, $options]);
+
+		return self::parse_response($response, $url, $headers, $data, $options);
+	}
+
+	/**
+	 * Send multiple HTTP requests simultaneously
+	 *
+	 * The `$requests` parameter takes an associative or indexed array of
+	 * request fields. The key of each request can be used to match up the
+	 * request with the returned data, or with the request passed into your
+	 * `multiple.request.complete` callback.
+	 *
+	 * The request fields value is an associative array with the following keys:
+	 *
+	 * - `url`: Request URL Same as the `$url` parameter to
+	 *    {@see \WpOrg\Requests\Requests::request()}
+	 *    (string, required)
+	 * - `headers`: Associative array of header fields. Same as the `$headers`
+	 *    parameter to {@see \WpOrg\Requests\Requests::request()}
+	 *    (array, default: `array()`)
+	 * - `data`: Associative array of data fields or a string. Same as the
+	 *    `$data` parameter to {@see \WpOrg\Requests\Requests::request()}
+	 *    (array|string, default: `array()`)
+	 * - `type`: HTTP request type (use \WpOrg\Requests\Requests constants). Same as the `$type`
+	 *    parameter to {@see \WpOrg\Requests\Requests::request()}
+	 *    (string, default: `\WpOrg\Requests\Requests::GET`)
+	 * - `cookies`: Associative array of cookie name to value, or cookie jar.
+	 *    (array|\WpOrg\Requests\Cookie\Jar)
+	 *
+	 * If the `$options` parameter is specified, individual requests will
+	 * inherit options from it. This can be used to use a single hooking system,
+	 * or set all the types to `\WpOrg\Requests\Requests::POST`, for example.
+	 *
+	 * In addition, the `$options` parameter takes the following global options:
+	 *
+	 * - `complete`: A callback for when a request is complete. Takes two
+	 *    parameters, a \WpOrg\Requests\Response/\WpOrg\Requests\Exception reference, and the
+	 *    ID from the request array (Note: this can also be overridden on a
+	 *    per-request basis, although that's a little silly)
+	 *    (callback)
+	 *
+	 * @param array $requests Requests data (see description for more information)
+	 * @param array $options Global and default options (see {@see \WpOrg\Requests\Requests::request()})
+	 * @return array Responses (either \WpOrg\Requests\Response or a \WpOrg\Requests\Exception object)
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $requests argument is not an array or iterable object with array access.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $options argument is not an array.
+	 */
+	public static function request_multiple($requests, $options = []) {
+		if (InputValidator::has_array_access($requests) === false || InputValidator::is_iterable($requests) === false) {
+			throw InvalidArgument::create(1, '$requests', 'array|ArrayAccess&Traversable', gettype($requests));
+		}
+
+		if (is_array($options) === false) {
+			throw InvalidArgument::create(2, '$options', 'array', gettype($options));
+		}
+
+		$options = array_merge(self::get_default_options(true), $options);
+
+		if (!empty($options['hooks'])) {
+			$options['hooks']->register('transport.internal.parse_response', [static::class, 'parse_multiple']);
+			if (!empty($options['complete'])) {
+				$options['hooks']->register('multiple.request.complete', $options['complete']);
+			}
+		}
+
+		foreach ($requests as $id => &$request) {
+			if (!isset($request['headers'])) {
+				$request['headers'] = [];
+			}
+
+			if (!isset($request['data'])) {
+				$request['data'] = [];
+			}
+
+			if (!isset($request['type'])) {
+				$request['type'] = self::GET;
+			}
+
+			if (!isset($request['options'])) {
+				$request['options']         = $options;
+				$request['options']['type'] = $request['type'];
+			} else {
+				if (empty($request['options']['type'])) {
+					$request['options']['type'] = $request['type'];
+				}
+
+				$request['options'] = array_merge($options, $request['options']);
+			}
+
+			self::set_defaults($request['url'], $request['headers'], $request['data'], $request['type'], $request['options']);
+
+			// Ensure we only hook in once
+			if ($request['options']['hooks'] !== $options['hooks']) {
+				$request['options']['hooks']->register('transport.internal.parse_response', [static::class, 'parse_multiple']);
+				if (!empty($request['options']['complete'])) {
+					$request['options']['hooks']->register('multiple.request.complete', $request['options']['complete']);
+				}
+			}
+		}
+
+		unset($request);
+
+		if (!empty($options['transport'])) {
+			$transport = $options['transport'];
+
+			if (is_string($options['transport'])) {
+				$transport = new $transport();
+			}
+		} else {
+			$transport = self::get_transport();
+		}
+
+		$responses = $transport->request_multiple($requests, $options);
+
+		foreach ($responses as $id => &$response) {
+			// If our hook got messed with somehow, ensure we end up with the
+			// correct response
+			if (is_string($response)) {
+				$request = $requests[$id];
+				self::parse_multiple($response, $request);
+				$request['options']['hooks']->dispatch('multiple.request.complete', [&$response, $id]);
+			}
+		}
+
+		return $responses;
+	}
+
+	/**
+	 * Get the default options
+	 *
+	 * @see \WpOrg\Requests\Requests::request() for values returned by this method
+	 * @param boolean $multirequest Is this a multirequest?
+	 * @return array Default option values
+	 */
+	protected static function get_default_options($multirequest = false) {
+		$defaults           = static::OPTION_DEFAULTS;
+		$defaults['verify'] = self::$certificate_path;
+
+		if ($multirequest !== false) {
+			$defaults['complete'] = null;
+		}
+
+		return $defaults;
+	}
+
+	/**
+	 * Get default certificate path.
+	 *
+	 * @return string Default certificate path.
+	 */
+	public static function get_certificate_path() {
+		return self::$certificate_path;
+	}
+
+	/**
+	 * Set default certificate path.
+	 *
+	 * @param string|Stringable|bool $path Certificate path, pointing to a PEM file.
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $url argument is not a string, Stringable or boolean.
+	 */
+	public static function set_certificate_path($path) {
+		if (InputValidator::is_string_or_stringable($path) === false && is_bool($path) === false) {
+			throw InvalidArgument::create(1, '$path', 'string|Stringable|bool', gettype($path));
+		}
+
+		self::$certificate_path = $path;
+	}
+
+	/**
+	 * Set the default values
+	 *
+	 * The $options parameter is updated with the results.
+	 *
+	 * @param string $url URL to request
+	 * @param array $headers Extra headers to send with the request
+	 * @param array|null $data Data to send either as a query string for GET/HEAD requests, or in the body for POST requests
+	 * @param string $type HTTP request type
+	 * @param array $options Options for the request
+	 * @return void
+	 *
+	 * @throws \WpOrg\Requests\Exception When the $url is not an http(s) URL.
+	 */
+	protected static function set_defaults(&$url, &$headers, &$data, &$type, &$options) {
+		if (!preg_match('/^http(s)?:\/\//i', $url, $matches)) {
+			throw new Exception('Only HTTP(S) requests are handled.', 'nonhttp', $url);
+		}
+
+		if (empty($options['hooks'])) {
+			$options['hooks'] = new Hooks();
+		}
+
+		if (is_array($options['auth'])) {
+			$options['auth'] = new Basic($options['auth']);
+		}
+
+		if ($options['auth'] !== false) {
+			$options['auth']->register($options['hooks']);
+		}
+
+		if (is_string($options['proxy']) || is_array($options['proxy'])) {
+			$options['proxy'] = new Http($options['proxy']);
+		}
+
+		if ($options['proxy'] !== false) {
+			$options['proxy']->register($options['hooks']);
+		}
+
+		if (is_array($options['cookies'])) {
+			$options['cookies'] = new Jar($options['cookies']);
+		} elseif (empty($options['cookies'])) {
+			$options['cookies'] = new Jar();
+		}
+
+		if ($options['cookies'] !== false) {
+			$options['cookies']->register($options['hooks']);
+		}
+
+		if ($options['idn'] !== false) {
+			$iri       = new Iri($url);
+			$iri->host = IdnaEncoder::encode($iri->ihost);
+			$url       = $iri->uri;
+		}
+
+		// Massage the type to ensure we support it.
+		$type = strtoupper($type);
+
+		if (!isset($options['data_format'])) {
+			if (in_array($type, [self::HEAD, self::GET, self::DELETE], true)) {
+				$options['data_format'] = 'query';
+			} else {
+				$options['data_format'] = 'body';
+			}
+		}
+	}
+
+	/**
+	 * HTTP response parser
+	 *
+	 * @param string $headers Full response text including headers and body
+	 * @param string $url Original request URL
+	 * @param array $req_headers Original $headers array passed to {@link request()}, in case we need to follow redirects
+	 * @param array $req_data Original $data array passed to {@link request()}, in case we need to follow redirects
+	 * @param array $options Original $options array passed to {@link request()}, in case we need to follow redirects
+	 * @return \WpOrg\Requests\Response
+	 *
+	 * @throws \WpOrg\Requests\Exception On missing head/body separator (`requests.no_crlf_separator`)
+	 * @throws \WpOrg\Requests\Exception On missing head/body separator (`noversion`)
+	 * @throws \WpOrg\Requests\Exception On missing head/body separator (`toomanyredirects`)
+	 */
+	protected static function parse_response($headers, $url, $req_headers, $req_data, $options) {
+		$return = new Response();
+		if (!$options['blocking']) {
+			return $return;
+		}
+
+		$return->raw  = $headers;
+		$return->url  = (string) $url;
+		$return->body = '';
+
+		if (!$options['filename']) {
+			$pos = strpos($headers, "\r\n\r\n");
+			if ($pos === false) {
+				// Crap!
+				throw new Exception('Missing header/body separator', 'requests.no_crlf_separator');
+			}
+
+			$headers = substr($return->raw, 0, $pos);
+			// Headers will always be separated from the body by two new lines - `\n\r\n\r`.
+			$body = substr($return->raw, $pos + 4);
+			if (!empty($body)) {
+				$return->body = $body;
+			}
+		}
+
+		// Pretend CRLF = LF for compatibility (RFC 2616, section 19.3)
+		$headers = str_replace("\r\n", "\n", $headers);
+		// Unfold headers (replace [CRLF] 1*( SP | HT ) with SP) as per RFC 2616 (section 2.2)
+		$headers = preg_replace('/\n[ \t]/', ' ', $headers);
+		$headers = explode("\n", $headers);
+		preg_match('#^HTTP/(1\.\d)[ \t]+(\d+)#i', array_shift($headers), $matches);
+		if (empty($matches)) {
+			throw new Exception('Response could not be parsed', 'noversion', $headers);
+		}
+
+		$return->protocol_version = (float) $matches[1];
+		$return->status_code      = (int) $matches[2];
+		if ($return->status_code >= 200 && $return->status_code < 300) {
+			$return->success = true;
+		}
+
+		foreach ($headers as $header) {
+			list($key, $value) = explode(':', $header, 2);
+			$value             = trim($value);
+			preg_replace('#(\s+)#i', ' ', $value);
+			$return->headers[$key] = $value;
+		}
+
+		if (isset($return->headers['transfer-encoding'])) {
+			$return->body = self::decode_chunked($return->body);
+			unset($return->headers['transfer-encoding']);
+		}
+
+		if (isset($return->headers['content-encoding'])) {
+			$return->body = self::decompress($return->body);
+		}
+
+		//fsockopen and cURL compatibility
+		if (isset($return->headers['connection'])) {
+			unset($return->headers['connection']);
+		}
+
+		$options['hooks']->dispatch('requests.before_redirect_check', [&$return, $req_headers, $req_data, $options]);
+
+		if ($return->is_redirect() && $options['follow_redirects'] === true) {
+			if (isset($return->headers['location']) && $options['redirected'] < $options['redirects']) {
+				if ($return->status_code === 303) {
+					$options['type'] = self::GET;
+				}
+
+				$options['redirected']++;
+				$location = $return->headers['location'];
+				if (strpos($location, 'http://') !== 0 && strpos($location, 'https://') !== 0) {
+					// relative redirect, for compatibility make it absolute
+					$location = Iri::absolutize($url, $location);
+					$location = $location->uri;
+				}
+
+				$hook_args = [
+					&$location,
+					&$req_headers,
+					&$req_data,
+					&$options,
+					$return,
+				];
+				$options['hooks']->dispatch('requests.before_redirect', $hook_args);
+				$redirected            = self::request($location, $req_headers, $req_data, $options['type'], $options);
+				$redirected->history[] = $return;
+				return $redirected;
+			} elseif ($options['redirected'] >= $options['redirects']) {
+				throw new Exception('Too many redirects', 'toomanyredirects', $return);
+			}
+		}
+
+		$return->redirects = $options['redirected'];
+
+		$options['hooks']->dispatch('requests.after_request', [&$return, $req_headers, $req_data, $options]);
+		return $return;
+	}
+
+	/**
+	 * Callback for `transport.internal.parse_response`
+	 *
+	 * Internal use only. Converts a raw HTTP response to a \WpOrg\Requests\Response
+	 * while still executing a multiple request.
+	 *
+	 * `$response` is either set to a \WpOrg\Requests\Response instance, or a \WpOrg\Requests\Exception object
+	 *
+	 * @param string $response Full response text including headers and body (will be overwritten with Response instance)
+	 * @param array $request Request data as passed into {@see \WpOrg\Requests\Requests::request_multiple()}
+	 * @return void
+	 */
+	public static function parse_multiple(&$response, $request) {
+		try {
+			$url      = $request['url'];
+			$headers  = $request['headers'];
+			$data     = $request['data'];
+			$options  = $request['options'];
+			$response = self::parse_response($response, $url, $headers, $data, $options);
+		} catch (Exception $e) {
+			$response = $e;
+		}
+	}
+
+	/**
+	 * Decoded a chunked body as per RFC 2616
+	 *
+	 * @link https://tools.ietf.org/html/rfc2616#section-3.6.1
+	 * @param string $data Chunked body
+	 * @return string Decoded body
+	 */
+	protected static function decode_chunked($data) {
+		if (!preg_match('/^([0-9a-f]+)(?:;(?:[\w-]*)(?:=(?:(?:[\w-]*)*|"(?:[^\r\n])*"))?)*\r\n/i', trim($data))) {
+			return $data;
+		}
+
+		$decoded = '';
+		$encoded = $data;
+
+		while (true) {
+			$is_chunked = (bool) preg_match('/^([0-9a-f]+)(?:;(?:[\w-]*)(?:=(?:(?:[\w-]*)*|"(?:[^\r\n])*"))?)*\r\n/i', $encoded, $matches);
+			if (!$is_chunked) {
+				// Looks like it's not chunked after all
+				return $data;
+			}
+
+			$length = hexdec(trim($matches[1]));
+			if ($length === 0) {
+				// Ignore trailer headers
+				return $decoded;
+			}
+
+			$chunk_length = strlen($matches[0]);
+			$decoded     .= substr($encoded, $chunk_length, $length);
+			$encoded      = substr($encoded, $chunk_length + $length + 2);
+
+			if (trim($encoded) === '0' || empty($encoded)) {
+				return $decoded;
+			}
+		}
+
+		// We'll never actually get down here
+		// @codeCoverageIgnoreStart
+	}
+	// @codeCoverageIgnoreEnd
+
+	/**
+	 * Convert a key => value array to a 'key: value' array for headers
+	 *
+	 * @param iterable $dictionary Dictionary of header values
+	 * @return array List of headers
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not iterable.
+	 */
+	public static function flatten($dictionary) {
+		if (InputValidator::is_iterable($dictionary) === false) {
+			throw InvalidArgument::create(1, '$dictionary', 'iterable', gettype($dictionary));
+		}
+
+		$return = [];
+		foreach ($dictionary as $key => $value) {
+			$return[] = sprintf('%s: %s', $key, $value);
+		}
+
+		return $return;
+	}
+
+	/**
+	 * Decompress an encoded body
+	 *
+	 * Implements gzip, compress and deflate. Guesses which it is by attempting
+	 * to decode.
+	 *
+	 * @param string $data Compressed data in one of the above formats
+	 * @return string Decompressed string
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not a string.
+	 */
+	public static function decompress($data) {
+		if (is_string($data) === false) {
+			throw InvalidArgument::create(1, '$data', 'string', gettype($data));
+		}
+
+		if (trim($data) === '') {
+			// Empty body does not need further processing.
+			return $data;
+		}
+
+		$marker = substr($data, 0, 2);
+		if (!isset(self::$magic_compression_headers[$marker])) {
+			// Not actually compressed. Probably cURL ruining this for us.
+			return $data;
+		}
+
+		if (function_exists('gzdecode')) {
+			$decoded = @gzdecode($data);
+			if ($decoded !== false) {
+				return $decoded;
+			}
+		}
+
+		if (function_exists('gzinflate')) {
+			$decoded = @gzinflate($data);
+			if ($decoded !== false) {
+				return $decoded;
+			}
+		}
+
+		$decoded = self::compatible_gzinflate($data);
+		if ($decoded !== false) {
+			return $decoded;
+		}
+
+		if (function_exists('gzuncompress')) {
+			$decoded = @gzuncompress($data);
+			if ($decoded !== false) {
+				return $decoded;
+			}
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Decompression of deflated string while staying compatible with the majority of servers.
+	 *
+	 * Certain Servers will return deflated data with headers which PHP's gzinflate()
+	 * function cannot handle out of the box. The following function has been created from
+	 * various snippets on the gzinflate() PHP documentation.
+	 *
+	 * Warning: Magic numbers within. Due to the potential different formats that the compressed
+	 * data may be returned in, some "magic offsets" are needed to ensure proper decompression
+	 * takes place. For a simple progmatic way to determine the magic offset in use, see:
+	 * https://core.trac.wordpress.org/ticket/18273
+	 *
+	 * @since 1.6.0
+	 * @link https://core.trac.wordpress.org/ticket/18273
+	 * @link https://www.php.net/gzinflate#70875
+	 * @link https://www.php.net/gzinflate#77336
+	 *
+	 * @param string $gz_data String to decompress.
+	 * @return string|bool False on failure.
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not a string.
+	 */
+	public static function compatible_gzinflate($gz_data) {
+		if (is_string($gz_data) === false) {
+			throw InvalidArgument::create(1, '$gz_data', 'string', gettype($gz_data));
+		}
+
+		if (trim($gz_data) === '') {
+			return false;
+		}
+
+		// Compressed data might contain a full zlib header, if so strip it for
+		// gzinflate()
+		if (substr($gz_data, 0, 3) === "\x1f\x8b\x08") {
+			$i   = 10;
+			$flg = ord(substr($gz_data, 3, 1));
+			if ($flg > 0) {
+				if ($flg & 4) {
+					list($xlen) = unpack('v', substr($gz_data, $i, 2));
+					$i         += 2 + $xlen;
+				}
+
+				if ($flg & 8) {
+					$i = strpos($gz_data, "\0", $i) + 1;
+				}
+
+				if ($flg & 16) {
+					$i = strpos($gz_data, "\0", $i) + 1;
+				}
+
+				if ($flg & 2) {
+					$i += 2;
+				}
+			}
+
+			$decompressed = self::compatible_gzinflate(substr($gz_data, $i));
+			if ($decompressed !== false) {
+				return $decompressed;
+			}
+		}
+
+		// If the data is Huffman Encoded, we must first strip the leading 2
+		// byte Huffman marker for gzinflate()
+		// The response is Huffman coded by many compressors such as
+		// java.util.zip.Deflater, Ruby's Zlib::Deflate, and .NET's
+		// System.IO.Compression.DeflateStream.
+		//
+		// See https://decompres.blogspot.com/ for a quick explanation of this
+		// data type
+		$huffman_encoded = false;
+
+		// low nibble of first byte should be 0x08
+		list(, $first_nibble) = unpack('h', $gz_data);
+
+		// First 2 bytes should be divisible by 0x1F
+		list(, $first_two_bytes) = unpack('n', $gz_data);
+
+		if ($first_nibble === 0x08 && ($first_two_bytes % 0x1F) === 0) {
+			$huffman_encoded = true;
+		}
+
+		if ($huffman_encoded) {
+			$decompressed = @gzinflate(substr($gz_data, 2));
+			if ($decompressed !== false) {
+				return $decompressed;
+			}
+		}
+
+		if (substr($gz_data, 0, 4) === "\x50\x4b\x03\x04") {
+			// ZIP file format header
+			// Offset 6: 2 bytes, General-purpose field
+			// Offset 26: 2 bytes, filename length
+			// Offset 28: 2 bytes, optional field length
+			// Offset 30: Filename field, followed by optional field, followed
+			// immediately by data
+			list(, $general_purpose_flag) = unpack('v', substr($gz_data, 6, 2));
+
+			// If the file has been compressed on the fly, 0x08 bit is set of
+			// the general purpose field. We can use this to differentiate
+			// between a compressed document, and a ZIP file
+			$zip_compressed_on_the_fly = ((0x08 & $general_purpose_flag) === 0x08);
+
+			if (!$zip_compressed_on_the_fly) {
+				// Don't attempt to decode a compressed zip file
+				return $gz_data;
+			}
+
+			// Determine the first byte of data, based on the above ZIP header
+			// offsets:
+			$first_file_start = array_sum(unpack('v2', substr($gz_data, 26, 4)));
+			$decompressed     = @gzinflate(substr($gz_data, 30 + $first_file_start));
+			if ($decompressed !== false) {
+				return $decompressed;
+			}
+
+			return false;
+		}
+
+		// Finally fall back to straight gzinflate
+		$decompressed = @gzinflate($gz_data);
+		if ($decompressed !== false) {
+			return $decompressed;
+		}
+
+		// Fallback for all above failing, not expected, but included for
+		// debugging and preventing regressions and to track stats
+		$decompressed = @gzinflate(substr($gz_data, 2));
+		if ($decompressed !== false) {
+			return $decompressed;
+		}
+
+		return false;
+	}
+}
diff --git a/wp-includes/Requests/src/Response.php b/wp-includes/Requests/src/Response.php
new file mode 100644
index 0000000..86a0438
--- /dev/null
+++ b/wp-includes/Requests/src/Response.php
@@ -0,0 +1,165 @@
+<?php
+/**
+ * HTTP response class
+ *
+ * Contains a response from \WpOrg\Requests\Requests::request()
+ *
+ * @package Requests
+ */
+
+namespace WpOrg\Requests;
+
+use WpOrg\Requests\Cookie\Jar;
+use WpOrg\Requests\Exception;
+use WpOrg\Requests\Exception\Http;
+use WpOrg\Requests\Response\Headers;
+
+/**
+ * HTTP response class
+ *
+ * Contains a response from \WpOrg\Requests\Requests::request()
+ *
+ * @package Requests
+ */
+class Response {
+
+	/**
+	 * Response body
+	 *
+	 * @var string
+	 */
+	public $body = '';
+
+	/**
+	 * Raw HTTP data from the transport
+	 *
+	 * @var string
+	 */
+	public $raw = '';
+
+	/**
+	 * Headers, as an associative array
+	 *
+	 * @var \WpOrg\Requests\Response\Headers Array-like object representing headers
+	 */
+	public $headers = [];
+
+	/**
+	 * Status code, false if non-blocking
+	 *
+	 * @var integer|boolean
+	 */
+	public $status_code = false;
+
+	/**
+	 * Protocol version, false if non-blocking
+	 *
+	 * @var float|boolean
+	 */
+	public $protocol_version = false;
+
+	/**
+	 * Whether the request succeeded or not
+	 *
+	 * @var boolean
+	 */
+	public $success = false;
+
+	/**
+	 * Number of redirects the request used
+	 *
+	 * @var integer
+	 */
+	public $redirects = 0;
+
+	/**
+	 * URL requested
+	 *
+	 * @var string
+	 */
+	public $url = '';
+
+	/**
+	 * Previous requests (from redirects)
+	 *
+	 * @var array Array of \WpOrg\Requests\Response objects
+	 */
+	public $history = [];
+
+	/**
+	 * Cookies from the request
+	 *
+	 * @var \WpOrg\Requests\Cookie\Jar Array-like object representing a cookie jar
+	 */
+	public $cookies = [];
+
+	/**
+	 * Constructor
+	 */
+	public function __construct() {
+		$this->headers = new Headers();
+		$this->cookies = new Jar();
+	}
+
+	/**
+	 * Is the response a redirect?
+	 *
+	 * @return boolean True if redirect (3xx status), false if not.
+	 */
+	public function is_redirect() {
+		$code = $this->status_code;
+		return in_array($code, [300, 301, 302, 303, 307], true) || $code > 307 && $code < 400;
+	}
+
+	/**
+	 * Throws an exception if the request was not successful
+	 *
+	 * @param boolean $allow_redirects Set to false to throw on a 3xx as well
+	 *
+	 * @throws \WpOrg\Requests\Exception If `$allow_redirects` is false, and code is 3xx (`response.no_redirects`)
+	 * @throws \WpOrg\Requests\Exception\Http On non-successful status code. Exception class corresponds to "Status" + code (e.g. {@see \WpOrg\Requests\Exception\Http\Status404})
+	 */
+	public function throw_for_status($allow_redirects = true) {
+		if ($this->is_redirect()) {
+			if ($allow_redirects !== true) {
+				throw new Exception('Redirection not allowed', 'response.no_redirects', $this);
+			}
+		} elseif (!$this->success) {
+			$exception = Http::get_class($this->status_code);
+			throw new $exception(null, $this);
+		}
+	}
+
+	/**
+	 * JSON decode the response body.
+	 *
+	 * The method parameters are the same as those for the PHP native `json_decode()` function.
+	 *
+	 * @link https://php.net/json-decode
+	 *
+	 * @param bool|null $associative Optional. When `true`, JSON objects will be returned as associative arrays;
+	 *                               When `false`, JSON objects will be returned as objects.
+	 *                               When `null`, JSON objects will be returned as associative arrays
+	 *                               or objects depending on whether `JSON_OBJECT_AS_ARRAY` is set in the flags.
+	 *                               Defaults to `true` (in contrast to the PHP native default of `null`).
+	 * @param int       $depth       Optional. Maximum nesting depth of the structure being decoded.
+	 *                               Defaults to `512`.
+	 * @param int       $options     Optional. Bitmask of JSON_BIGINT_AS_STRING, JSON_INVALID_UTF8_IGNORE,
+	 *                               JSON_INVALID_UTF8_SUBSTITUTE, JSON_OBJECT_AS_ARRAY, JSON_THROW_ON_ERROR.
+	 *                               Defaults to `0` (no options set).
+	 *
+	 * @return array
+	 *
+	 * @throws \WpOrg\Requests\Exception If `$this->body` is not valid json.
+	 */
+	public function decode_body($associative = true, $depth = 512, $options = 0) {
+		$data = json_decode($this->body, $associative, $depth, $options);
+
+		if (json_last_error() !== JSON_ERROR_NONE) {
+			$last_error = json_last_error_msg();
+			throw new Exception('Unable to parse JSON data: ' . $last_error, 'response.invalid', $this);
+		}
+
+		return $data;
+	}
+}
diff --git a/wp-includes/Requests/src/Response/Headers.php b/wp-includes/Requests/src/Response/Headers.php
new file mode 100644
index 0000000..b4d0fcf
--- /dev/null
+++ b/wp-includes/Requests/src/Response/Headers.php
@@ -0,0 +1,127 @@
+<?php
+/**
+ * Case-insensitive dictionary, suitable for HTTP headers
+ *
+ * @package Requests
+ */
+
+namespace WpOrg\Requests\Response;
+
+use WpOrg\Requests\Exception;
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Utility\CaseInsensitiveDictionary;
+use WpOrg\Requests\Utility\FilteredIterator;
+
+/**
+ * Case-insensitive dictionary, suitable for HTTP headers
+ *
+ * @package Requests
+ */
+class Headers extends CaseInsensitiveDictionary {
+	/**
+	 * Get the given header
+	 *
+	 * Unlike {@see \WpOrg\Requests\Response\Headers::getValues()}, this returns a string. If there are
+	 * multiple values, it concatenates them with a comma as per RFC2616.
+	 *
+	 * Avoid using this where commas may be used unquoted in values, such as
+	 * Set-Cookie headers.
+	 *
+	 * @param string $offset Name of the header to retrieve.
+	 * @return string|null Header value
+	 */
+	public function offsetGet($offset) {
+		if (is_string($offset)) {
+			$offset = strtolower($offset);
+		}
+
+		if (!isset($this->data[$offset])) {
+			return null;
+		}
+
+		return $this->flatten($this->data[$offset]);
+	}
+
+	/**
+	 * Set the given item
+	 *
+	 * @param string $offset Item name
+	 * @param string $value Item value
+	 *
+	 * @throws \WpOrg\Requests\Exception On attempting to use dictionary as list (`invalidset`)
+	 */
+	public function offsetSet($offset, $value) {
+		if ($offset === null) {
+			throw new Exception('Object is a dictionary, not a list', 'invalidset');
+		}
+
+		if (is_string($offset)) {
+			$offset = strtolower($offset);
+		}
+
+		if (!isset($this->data[$offset])) {
+			$this->data[$offset] = [];
+		}
+
+		$this->data[$offset][] = $value;
+	}
+
+	/**
+	 * Get all values for a given header
+	 *
+	 * @param string $offset Name of the header to retrieve.
+	 * @return array|null Header values
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not valid as an array key.
+	 */
+	public function getValues($offset) {
+		if (!is_string($offset) && !is_int($offset)) {
+			throw InvalidArgument::create(1, '$offset', 'string|int', gettype($offset));
+		}
+
+		if (is_string($offset)) {
+			$offset = strtolower($offset);
+		}
+
+		if (!isset($this->data[$offset])) {
+			return null;
+		}
+
+		return $this->data[$offset];
+	}
+
+	/**
+	 * Flattens a value into a string
+	 *
+	 * Converts an array into a string by imploding values with a comma, as per
+	 * RFC2616's rules for folding headers.
+	 *
+	 * @param string|array $value Value to flatten
+	 * @return string Flattened value
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not a string or an array.
+	 */
+	public function flatten($value) {
+		if (is_string($value)) {
+			return $value;
+		}
+
+		if (is_array($value)) {
+			return implode(',', $value);
+		}
+
+		throw InvalidArgument::create(1, '$value', 'string|array', gettype($value));
+	}
+
+	/**
+	 * Get an iterator for the data
+	 *
+	 * Converts the internally stored values to a comma-separated string if there is more
+	 * than one value for a key.
+	 *
+	 * @return \ArrayIterator
+	 */
+	public function getIterator() {
+		return new FilteredIterator($this->data, [$this, 'flatten']);
+	}
+}
diff --git a/wp-includes/Requests/src/Session.php b/wp-includes/Requests/src/Session.php
new file mode 100644
index 0000000..0a63279
--- /dev/null
+++ b/wp-includes/Requests/src/Session.php
@@ -0,0 +1,308 @@
+<?php
+/**
+ * Session handler for persistent requests and default parameters
+ *
+ * @package Requests\SessionHandler
+ */
+
+namespace WpOrg\Requests;
+
+use WpOrg\Requests\Cookie\Jar;
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Iri;
+use WpOrg\Requests\Requests;
+use WpOrg\Requests\Utility\InputValidator;
+
+/**
+ * Session handler for persistent requests and default parameters
+ *
+ * Allows various options to be set as default values, and merges both the
+ * options and URL properties together. A base URL can be set for all requests,
+ * with all subrequests resolved from this. Base options can be set (including
+ * a shared cookie jar), then overridden for individual requests.
+ *
+ * @package Requests\SessionHandler
+ */
+class Session {
+	/**
+	 * Base URL for requests
+	 *
+	 * URLs will be made absolute using this as the base
+	 *
+	 * @var string|null
+	 */
+	public $url = null;
+
+	/**
+	 * Base headers for requests
+	 *
+	 * @var array
+	 */
+	public $headers = [];
+
+	/**
+	 * Base data for requests
+	 *
+	 * If both the base data and the per-request data are arrays, the data will
+	 * be merged before sending the request.
+	 *
+	 * @var array
+	 */
+	public $data = [];
+
+	/**
+	 * Base options for requests
+	 *
+	 * The base options are merged with the per-request data for each request.
+	 * The only default option is a shared cookie jar between requests.
+	 *
+	 * Values here can also be set directly via properties on the Session
+	 * object, e.g. `$session->useragent = 'X';`
+	 *
+	 * @var array
+	 */
+	public $options = [];
+
+	/**
+	 * Create a new session
+	 *
+	 * @param string|Stringable|null $url Base URL for requests
+	 * @param array $headers Default headers for requests
+	 * @param array $data Default data for requests
+	 * @param array $options Default options for requests
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $url argument is not a string, Stringable or null.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $headers argument is not an array.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $data argument is not an array.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $options argument is not an array.
+	 */
+	public function __construct($url = null, $headers = [], $data = [], $options = []) {
+		if ($url !== null && InputValidator::is_string_or_stringable($url) === false) {
+			throw InvalidArgument::create(1, '$url', 'string|Stringable|null', gettype($url));
+		}
+
+		if (is_array($headers) === false) {
+			throw InvalidArgument::create(2, '$headers', 'array', gettype($headers));
+		}
+
+		if (is_array($data) === false) {
+			throw InvalidArgument::create(3, '$data', 'array', gettype($data));
+		}
+
+		if (is_array($options) === false) {
+			throw InvalidArgument::create(4, '$options', 'array', gettype($options));
+		}
+
+		$this->url     = $url;
+		$this->headers = $headers;
+		$this->data    = $data;
+		$this->options = $options;
+
+		if (empty($this->options['cookies'])) {
+			$this->options['cookies'] = new Jar();
+		}
+	}
+
+	/**
+	 * Get a property's value
+	 *
+	 * @param string $name Property name.
+	 * @return mixed|null Property value, null if none found
+	 */
+	public function __get($name) {
+		if (isset($this->options[$name])) {
+			return $this->options[$name];
+		}
+
+		return null;
+	}
+
+	/**
+	 * Set a property's value
+	 *
+	 * @param string $name Property name.
+	 * @param mixed $value Property value
+	 */
+	public function __set($name, $value) {
+		$this->options[$name] = $value;
+	}
+
+	/**
+	 * Remove a property's value
+	 *
+	 * @param string $name Property name.
+	 */
+	public function __isset($name) {
+		return isset($this->options[$name]);
+	}
+
+	/**
+	 * Remove a property's value
+	 *
+	 * @param string $name Property name.
+	 */
+	public function __unset($name) {
+		unset($this->options[$name]);
+	}
+
+	/**#@+
+	 * @see \WpOrg\Requests\Session::request()
+	 * @param string $url
+	 * @param array $headers
+	 * @param array $options
+	 * @return \WpOrg\Requests\Response
+	 */
+	/**
+	 * Send a GET request
+	 */
+	public function get($url, $headers = [], $options = []) {
+		return $this->request($url, $headers, null, Requests::GET, $options);
+	}
+
+	/**
+	 * Send a HEAD request
+	 */
+	public function head($url, $headers = [], $options = []) {
+		return $this->request($url, $headers, null, Requests::HEAD, $options);
+	}
+
+	/**
+	 * Send a DELETE request
+	 */
+	public function delete($url, $headers = [], $options = []) {
+		return $this->request($url, $headers, null, Requests::DELETE, $options);
+	}
+	/**#@-*/
+
+	/**#@+
+	 * @see \WpOrg\Requests\Session::request()
+	 * @param string $url
+	 * @param array $headers
+	 * @param array $data
+	 * @param array $options
+	 * @return \WpOrg\Requests\Response
+	 */
+	/**
+	 * Send a POST request
+	 */
+	public function post($url, $headers = [], $data = [], $options = []) {
+		return $this->request($url, $headers, $data, Requests::POST, $options);
+	}
+
+	/**
+	 * Send a PUT request
+	 */
+	public function put($url, $headers = [], $data = [], $options = []) {
+		return $this->request($url, $headers, $data, Requests::PUT, $options);
+	}
+
+	/**
+	 * Send a PATCH request
+	 *
+	 * Note: Unlike {@see \WpOrg\Requests\Session::post()} and {@see \WpOrg\Requests\Session::put()},
+	 * `$headers` is required, as the specification recommends that should send an ETag
+	 *
+	 * @link https://tools.ietf.org/html/rfc5789
+	 */
+	public function patch($url, $headers, $data = [], $options = []) {
+		return $this->request($url, $headers, $data, Requests::PATCH, $options);
+	}
+	/**#@-*/
+
+	/**
+	 * Main interface for HTTP requests
+	 *
+	 * This method initiates a request and sends it via a transport before
+	 * parsing.
+	 *
+	 * @see \WpOrg\Requests\Requests::request()
+	 *
+	 * @param string $url URL to request
+	 * @param array $headers Extra headers to send with the request
+	 * @param array|null $data Data to send either as a query string for GET/HEAD requests, or in the body for POST requests
+	 * @param string $type HTTP request type (use \WpOrg\Requests\Requests constants)
+	 * @param array $options Options for the request (see {@see \WpOrg\Requests\Requests::request()})
+	 * @return \WpOrg\Requests\Response
+	 *
+	 * @throws \WpOrg\Requests\Exception On invalid URLs (`nonhttp`)
+	 */
+	public function request($url, $headers = [], $data = [], $type = Requests::GET, $options = []) {
+		$request = $this->merge_request(compact('url', 'headers', 'data', 'options'));
+
+		return Requests::request($request['url'], $request['headers'], $request['data'], $type, $request['options']);
+	}
+
+	/**
+	 * Send multiple HTTP requests simultaneously
+	 *
+	 * @see \WpOrg\Requests\Requests::request_multiple()
+	 *
+	 * @param array $requests Requests data (see {@see \WpOrg\Requests\Requests::request_multiple()})
+	 * @param array $options Global and default options (see {@see \WpOrg\Requests\Requests::request()})
+	 * @return array Responses (either \WpOrg\Requests\Response or a \WpOrg\Requests\Exception object)
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $requests argument is not an array or iterable object with array access.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $options argument is not an array.
+	 */
+	public function request_multiple($requests, $options = []) {
+		if (InputValidator::has_array_access($requests) === false || InputValidator::is_iterable($requests) === false) {
+			throw InvalidArgument::create(1, '$requests', 'array|ArrayAccess&Traversable', gettype($requests));
+		}
+
+		if (is_array($options) === false) {
+			throw InvalidArgument::create(2, '$options', 'array', gettype($options));
+		}
+
+		foreach ($requests as $key => $request) {
+			$requests[$key] = $this->merge_request($request, false);
+		}
+
+		$options = array_merge($this->options, $options);
+
+		// Disallow forcing the type, as that's a per request setting
+		unset($options['type']);
+
+		return Requests::request_multiple($requests, $options);
+	}
+
+	public function __wakeup() {
+		throw new \LogicException( __CLASS__ . ' should never be unserialized' );
+	}
+
+	/**
+	 * Merge a request's data with the default data
+	 *
+	 * @param array $request Request data (same form as {@see \WpOrg\Requests\Session::request_multiple()})
+	 * @param boolean $merge_options Should we merge options as well?
+	 * @return array Request data
+	 */
+	protected function merge_request($request, $merge_options = true) {
+		if ($this->url !== null) {
+			$request['url'] = Iri::absolutize($this->url, $request['url']);
+			$request['url'] = $request['url']->uri;
+		}
+
+		if (empty($request['headers'])) {
+			$request['headers'] = [];
+		}
+
+		$request['headers'] = array_merge($this->headers, $request['headers']);
+
+		if (empty($request['data'])) {
+			if (is_array($this->data)) {
+				$request['data'] = $this->data;
+			}
+		} elseif (is_array($request['data']) && is_array($this->data)) {
+			$request['data'] = array_merge($this->data, $request['data']);
+		}
+
+		if ($merge_options === true) {
+			$request['options'] = array_merge($this->options, $request['options']);
+
+			// Disallow forcing the type, as that's a per request setting
+			unset($request['options']['type']);
+		}
+
+		return $request;
+	}
+}
diff --git a/wp-includes/Requests/src/Ssl.php b/wp-includes/Requests/src/Ssl.php
new file mode 100644
index 0000000..99da11d
--- /dev/null
+++ b/wp-includes/Requests/src/Ssl.php
@@ -0,0 +1,182 @@
+<?php
+/**
+ * SSL utilities for Requests
+ *
+ * @package Requests\Utilities
+ */
+
+namespace WpOrg\Requests;
+
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Utility\InputValidator;
+
+/**
+ * SSL utilities for Requests
+ *
+ * Collection of utilities for working with and verifying SSL certificates.
+ *
+ * @package Requests\Utilities
+ */
+final class Ssl {
+	/**
+	 * Verify the certificate against common name and subject alternative names
+	 *
+	 * Unfortunately, PHP doesn't check the certificate against the alternative
+	 * names, leading things like 'https://www.github.com/' to be invalid.
+	 *
+	 * @link https://tools.ietf.org/html/rfc2818#section-3.1 RFC2818, Section 3.1
+	 *
+	 * @param string|Stringable $host Host name to verify against
+	 * @param array $cert Certificate data from openssl_x509_parse()
+	 * @return bool
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $host argument is not a string or a stringable object.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $cert argument is not an array or array accessible.
+	 */
+	public static function verify_certificate($host, $cert) {
+		if (InputValidator::is_string_or_stringable($host) === false) {
+			throw InvalidArgument::create(1, '$host', 'string|Stringable', gettype($host));
+		}
+
+		if (InputValidator::has_array_access($cert) === false) {
+			throw InvalidArgument::create(2, '$cert', 'array|ArrayAccess', gettype($cert));
+		}
+
+		$has_dns_alt = false;
+
+		// Check the subjectAltName
+		if (!empty($cert['extensions']['subjectAltName'])) {
+			$altnames = explode(',', $cert['extensions']['subjectAltName']);
+			foreach ($altnames as $altname) {
+				$altname = trim($altname);
+				if (strpos($altname, 'DNS:') !== 0) {
+					continue;
+				}
+
+				$has_dns_alt = true;
+
+				// Strip the 'DNS:' prefix and trim whitespace
+				$altname = trim(substr($altname, 4));
+
+				// Check for a match
+				if (self::match_domain($host, $altname) === true) {
+					return true;
+				}
+			}
+
+			if ($has_dns_alt === true) {
+				return false;
+			}
+		}
+
+		// Fall back to checking the common name if we didn't get any dNSName
+		// alt names, as per RFC2818
+		if (!empty($cert['subject']['CN'])) {
+			// Check for a match
+			return (self::match_domain($host, $cert['subject']['CN']) === true);
+		}
+
+		return false;
+	}
+
+	/**
+	 * Verify that a reference name is valid
+	 *
+	 * Verifies a dNSName for HTTPS usage, (almost) as per Firefox's rules:
+	 * - Wildcards can only occur in a name with more than 3 components
+	 * - Wildcards can only occur as the last character in the first
+	 *   component
+	 * - Wildcards may be preceded by additional characters
+	 *
+	 * We modify these rules to be a bit stricter and only allow the wildcard
+	 * character to be the full first component; that is, with the exclusion of
+	 * the third rule.
+	 *
+	 * @param string|Stringable $reference Reference dNSName
+	 * @return boolean Is the name valid?
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not a string or a stringable object.
+	 */
+	public static function verify_reference_name($reference) {
+		if (InputValidator::is_string_or_stringable($reference) === false) {
+			throw InvalidArgument::create(1, '$reference', 'string|Stringable', gettype($reference));
+		}
+
+		if ($reference === '') {
+			return false;
+		}
+
+		if (preg_match('`\s`', $reference) > 0) {
+			// Whitespace detected. This can never be a dNSName.
+			return false;
+		}
+
+		$parts = explode('.', $reference);
+		if ($parts !== array_filter($parts)) {
+			// DNSName cannot contain two dots next to each other.
+			return false;
+		}
+
+		// Check the first part of the name
+		$first = array_shift($parts);
+
+		if (strpos($first, '*') !== false) {
+			// Check that the wildcard is the full part
+			if ($first !== '*') {
+				return false;
+			}
+
+			// Check that we have at least 3 components (including first)
+			if (count($parts) < 2) {
+				return false;
+			}
+		}
+
+		// Check the remaining parts
+		foreach ($parts as $part) {
+			if (strpos($part, '*') !== false) {
+				return false;
+			}
+		}
+
+		// Nothing found, verified!
+		return true;
+	}
+
+	/**
+	 * Match a hostname against a dNSName reference
+	 *
+	 * @param string|Stringable $host Requested host
+	 * @param string|Stringable $reference dNSName to match against
+	 * @return boolean Does the domain match?
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When either of the passed arguments is not a string or a stringable object.
+	 */
+	public static function match_domain($host, $reference) {
+		if (InputValidator::is_string_or_stringable($host) === false) {
+			throw InvalidArgument::create(1, '$host', 'string|Stringable', gettype($host));
+		}
+
+		// Check if the reference is blocklisted first
+		if (self::verify_reference_name($reference) !== true) {
+			return false;
+		}
+
+		// Check for a direct match
+		if ((string) $host === (string) $reference) {
+			return true;
+		}
+
+		// Calculate the valid wildcard match if the host is not an IP address
+		// Also validates that the host has 3 parts or more, as per Firefox's ruleset,
+		// as a wildcard reference is only allowed with 3 parts or more, so the
+		// comparison will never match if host doesn't contain 3 parts or more as well.
+		if (ip2long($host) === false) {
+			$parts    = explode('.', $host);
+			$parts[0] = '*';
+			$wildcard = implode('.', $parts);
+			if ($wildcard === (string) $reference) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+}
diff --git a/wp-includes/Requests/src/Transport.php b/wp-includes/Requests/src/Transport.php
new file mode 100644
index 0000000..f2e1c6e
--- /dev/null
+++ b/wp-includes/Requests/src/Transport.php
@@ -0,0 +1,45 @@
+<?php
+/**
+ * Base HTTP transport
+ *
+ * @package Requests\Transport
+ */
+
+namespace WpOrg\Requests;
+
+/**
+ * Base HTTP transport
+ *
+ * @package Requests\Transport
+ */
+interface Transport {
+	/**
+	 * Perform a request
+	 *
+	 * @param string $url URL to request
+	 * @param array $headers Associative array of request headers
+	 * @param string|array $data Data to send either as the POST body, or as parameters in the URL for a GET/HEAD
+	 * @param array $options Request options, see {@see \WpOrg\Requests\Requests::response()} for documentation
+	 * @return string Raw HTTP result
+	 */
+	public function request($url, $headers = [], $data = [], $options = []);
+
+	/**
+	 * Send multiple requests simultaneously
+	 *
+	 * @param array $requests Request data (array of 'url', 'headers', 'data', 'options') as per {@see \WpOrg\Requests\Transport::request()}
+	 * @param array $options Global options, see {@see \WpOrg\Requests\Requests::response()} for documentation
+	 * @return array Array of \WpOrg\Requests\Response objects (may contain \WpOrg\Requests\Exception or string responses as well)
+	 */
+	public function request_multiple($requests, $options);
+
+	/**
+	 * Self-test whether the transport can be used.
+	 *
+	 * The available capabilities to test for can be found in {@see \WpOrg\Requests\Capability}.
+	 *
+	 * @param array<string, bool> $capabilities Optional. Associative array of capabilities to test against, i.e. `['<capability>' => true]`.
+	 * @return bool Whether the transport can be used.
+	 */
+	public static function test($capabilities = []);
+}
diff --git a/wp-includes/Requests/src/Transport/Curl.php b/wp-includes/Requests/src/Transport/Curl.php
new file mode 100644
index 0000000..7316987
--- /dev/null
+++ b/wp-includes/Requests/src/Transport/Curl.php
@@ -0,0 +1,640 @@
+<?php
+/**
+ * cURL HTTP transport
+ *
+ * @package Requests\Transport
+ */
+
+namespace WpOrg\Requests\Transport;
+
+use RecursiveArrayIterator;
+use RecursiveIteratorIterator;
+use WpOrg\Requests\Capability;
+use WpOrg\Requests\Exception;
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Exception\Transport\Curl as CurlException;
+use WpOrg\Requests\Requests;
+use WpOrg\Requests\Transport;
+use WpOrg\Requests\Utility\InputValidator;
+
+/**
+ * cURL HTTP transport
+ *
+ * @package Requests\Transport
+ */
+final class Curl implements Transport {
+	const CURL_7_10_5 = 0x070A05;
+	const CURL_7_16_2 = 0x071002;
+
+	/**
+	 * Raw HTTP data
+	 *
+	 * @var string
+	 */
+	public $headers = '';
+
+	/**
+	 * Raw body data
+	 *
+	 * @var string
+	 */
+	public $response_data = '';
+
+	/**
+	 * Information on the current request
+	 *
+	 * @var array cURL information array, see {@link https://www.php.net/curl_getinfo}
+	 */
+	public $info;
+
+	/**
+	 * cURL version number
+	 *
+	 * @var int
+	 */
+	public $version;
+
+	/**
+	 * cURL handle
+	 *
+	 * @var resource|\CurlHandle Resource in PHP < 8.0, Instance of CurlHandle in PHP >= 8.0.
+	 */
+	private $handle;
+
+	/**
+	 * Hook dispatcher instance
+	 *
+	 * @var \WpOrg\Requests\Hooks
+	 */
+	private $hooks;
+
+	/**
+	 * Have we finished the headers yet?
+	 *
+	 * @var boolean
+	 */
+	private $done_headers = false;
+
+	/**
+	 * If streaming to a file, keep the file pointer
+	 *
+	 * @var resource
+	 */
+	private $stream_handle;
+
+	/**
+	 * How many bytes are in the response body?
+	 *
+	 * @var int
+	 */
+	private $response_bytes;
+
+	/**
+	 * What's the maximum number of bytes we should keep?
+	 *
+	 * @var int|bool Byte count, or false if no limit.
+	 */
+	private $response_byte_limit;
+
+	/**
+	 * Constructor
+	 */
+	public function __construct() {
+		$curl          = curl_version();
+		$this->version = $curl['version_number'];
+		$this->handle  = curl_init();
+
+		curl_setopt($this->handle, CURLOPT_HEADER, false);
+		curl_setopt($this->handle, CURLOPT_RETURNTRANSFER, 1);
+		if ($this->version >= self::CURL_7_10_5) {
+			curl_setopt($this->handle, CURLOPT_ENCODING, '');
+		}
+
+		if (defined('CURLOPT_PROTOCOLS')) {
+			// phpcs:ignore PHPCompatibility.Constants.NewConstants.curlopt_protocolsFound
+			curl_setopt($this->handle, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
+		}
+
+		if (defined('CURLOPT_REDIR_PROTOCOLS')) {
+			// phpcs:ignore PHPCompatibility.Constants.NewConstants.curlopt_redir_protocolsFound
+			curl_setopt($this->handle, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
+		}
+	}
+
+	/**
+	 * Destructor
+	 */
+	public function __destruct() {
+		if (is_resource($this->handle)) {
+			curl_close($this->handle);
+		}
+	}
+
+	/**
+	 * Perform a request
+	 *
+	 * @param string|Stringable $url URL to request
+	 * @param array $headers Associative array of request headers
+	 * @param string|array $data Data to send either as the POST body, or as parameters in the URL for a GET/HEAD
+	 * @param array $options Request options, see {@see \WpOrg\Requests\Requests::response()} for documentation
+	 * @return string Raw HTTP result
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $url argument is not a string or Stringable.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $headers argument is not an array.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $data parameter is not an array or string.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $options argument is not an array.
+	 * @throws \WpOrg\Requests\Exception       On a cURL error (`curlerror`)
+	 */
+	public function request($url, $headers = [], $data = [], $options = []) {
+		if (InputValidator::is_string_or_stringable($url) === false) {
+			throw InvalidArgument::create(1, '$url', 'string|Stringable', gettype($url));
+		}
+
+		if (is_array($headers) === false) {
+			throw InvalidArgument::create(2, '$headers', 'array', gettype($headers));
+		}
+
+		if (!is_array($data) && !is_string($data)) {
+			if ($data === null) {
+				$data = '';
+			} else {
+				throw InvalidArgument::create(3, '$data', 'array|string', gettype($data));
+			}
+		}
+
+		if (is_array($options) === false) {
+			throw InvalidArgument::create(4, '$options', 'array', gettype($options));
+		}
+
+		$this->hooks = $options['hooks'];
+
+		$this->setup_handle($url, $headers, $data, $options);
+
+		$options['hooks']->dispatch('curl.before_send', [&$this->handle]);
+
+		if ($options['filename'] !== false) {
+			// phpcs:ignore WordPress.PHP.NoSilencedErrors -- Silenced the PHP native warning in favour of throwing an exception.
+			$this->stream_handle = @fopen($options['filename'], 'wb');
+			if ($this->stream_handle === false) {
+				$error = error_get_last();
+				throw new Exception($error['message'], 'fopen');
+			}
+		}
+
+		$this->response_data       = '';
+		$this->response_bytes      = 0;
+		$this->response_byte_limit = false;
+		if ($options['max_bytes'] !== false) {
+			$this->response_byte_limit = $options['max_bytes'];
+		}
+
+		if (isset($options['verify'])) {
+			if ($options['verify'] === false) {
+				curl_setopt($this->handle, CURLOPT_SSL_VERIFYHOST, 0);
+				curl_setopt($this->handle, CURLOPT_SSL_VERIFYPEER, 0);
+			} elseif (is_string($options['verify'])) {
+				curl_setopt($this->handle, CURLOPT_CAINFO, $options['verify']);
+			}
+		}
+
+		if (isset($options['verifyname']) && $options['verifyname'] === false) {
+			curl_setopt($this->handle, CURLOPT_SSL_VERIFYHOST, 0);
+		}
+
+		curl_exec($this->handle);
+		$response = $this->response_data;
+
+		$options['hooks']->dispatch('curl.after_send', []);
+
+		if (curl_errno($this->handle) === CURLE_WRITE_ERROR || curl_errno($this->handle) === CURLE_BAD_CONTENT_ENCODING) {
+			// Reset encoding and try again
+			curl_setopt($this->handle, CURLOPT_ENCODING, 'none');
+
+			$this->response_data  = '';
+			$this->response_bytes = 0;
+			curl_exec($this->handle);
+			$response = $this->response_data;
+		}
+
+		$this->process_response($response, $options);
+
+		// Need to remove the $this reference from the curl handle.
+		// Otherwise \WpOrg\Requests\Transport\Curl won't be garbage collected and the curl_close() will never be called.
+		curl_setopt($this->handle, CURLOPT_HEADERFUNCTION, null);
+		curl_setopt($this->handle, CURLOPT_WRITEFUNCTION, null);
+
+		return $this->headers;
+	}
+
+	/**
+	 * Send multiple requests simultaneously
+	 *
+	 * @param array $requests Request data
+	 * @param array $options Global options
+	 * @return array Array of \WpOrg\Requests\Response objects (may contain \WpOrg\Requests\Exception or string responses as well)
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $requests argument is not an array or iterable object with array access.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $options argument is not an array.
+	 */
+	public function request_multiple($requests, $options) {
+		// If you're not requesting, we can't get any responses ¯\_(ツ)_/¯
+		if (empty($requests)) {
+			return [];
+		}
+
+		if (InputValidator::has_array_access($requests) === false || InputValidator::is_iterable($requests) === false) {
+			throw InvalidArgument::create(1, '$requests', 'array|ArrayAccess&Traversable', gettype($requests));
+		}
+
+		if (is_array($options) === false) {
+			throw InvalidArgument::create(2, '$options', 'array', gettype($options));
+		}
+
+		$multihandle = curl_multi_init();
+		$subrequests = [];
+		$subhandles  = [];
+
+		$class = get_class($this);
+		foreach ($requests as $id => $request) {
+			$subrequests[$id] = new $class();
+			$subhandles[$id]  = $subrequests[$id]->get_subrequest_handle($request['url'], $request['headers'], $request['data'], $request['options']);
+			$request['options']['hooks']->dispatch('curl.before_multi_add', [&$subhandles[$id]]);
+			curl_multi_add_handle($multihandle, $subhandles[$id]);
+		}
+
+		$completed       = 0;
+		$responses       = [];
+		$subrequestcount = count($subrequests);
+
+		$request['options']['hooks']->dispatch('curl.before_multi_exec', [&$multihandle]);
+
+		do {
+			$active = 0;
+
+			do {
+				$status = curl_multi_exec($multihandle, $active);
+			} while ($status === CURLM_CALL_MULTI_PERFORM);
+
+			$to_process = [];
+
+			// Read the information as needed
+			while ($done = curl_multi_info_read($multihandle)) {
+				$key = array_search($done['handle'], $subhandles, true);
+				if (!isset($to_process[$key])) {
+					$to_process[$key] = $done;
+				}
+			}
+
+			// Parse the finished requests before we start getting the new ones
+			foreach ($to_process as $key => $done) {
+				$options = $requests[$key]['options'];
+				if ($done['result'] !== CURLE_OK) {
+					//get error string for handle.
+					$reason          = curl_error($done['handle']);
+					$exception       = new CurlException(
+						$reason,
+						CurlException::EASY,
+						$done['handle'],
+						$done['result']
+					);
+					$responses[$key] = $exception;
+					$options['hooks']->dispatch('transport.internal.parse_error', [&$responses[$key], $requests[$key]]);
+				} else {
+					$responses[$key] = $subrequests[$key]->process_response($subrequests[$key]->response_data, $options);
+
+					$options['hooks']->dispatch('transport.internal.parse_response', [&$responses[$key], $requests[$key]]);
+				}
+
+				curl_multi_remove_handle($multihandle, $done['handle']);
+				curl_close($done['handle']);
+
+				if (!is_string($responses[$key])) {
+					$options['hooks']->dispatch('multiple.request.complete', [&$responses[$key], $key]);
+				}
+
+				$completed++;
+			}
+		} while ($active || $completed < $subrequestcount);
+
+		$request['options']['hooks']->dispatch('curl.after_multi_exec', [&$multihandle]);
+
+		curl_multi_close($multihandle);
+
+		return $responses;
+	}
+
+	/**
+	 * Get the cURL handle for use in a multi-request
+	 *
+	 * @param string $url URL to request
+	 * @param array $headers Associative array of request headers
+	 * @param string|array $data Data to send either as the POST body, or as parameters in the URL for a GET/HEAD
+	 * @param array $options Request options, see {@see \WpOrg\Requests\Requests::response()} for documentation
+	 * @return resource|\CurlHandle Subrequest's cURL handle
+	 */
+	public function &get_subrequest_handle($url, $headers, $data, $options) {
+		$this->setup_handle($url, $headers, $data, $options);
+
+		if ($options['filename'] !== false) {
+			$this->stream_handle = fopen($options['filename'], 'wb');
+		}
+
+		$this->response_data       = '';
+		$this->response_bytes      = 0;
+		$this->response_byte_limit = false;
+		if ($options['max_bytes'] !== false) {
+			$this->response_byte_limit = $options['max_bytes'];
+		}
+
+		$this->hooks = $options['hooks'];
+
+		return $this->handle;
+	}
+
+	/**
+	 * Setup the cURL handle for the given data
+	 *
+	 * @param string $url URL to request
+	 * @param array $headers Associative array of request headers
+	 * @param string|array $data Data to send either as the POST body, or as parameters in the URL for a GET/HEAD
+	 * @param array $options Request options, see {@see \WpOrg\Requests\Requests::response()} for documentation
+	 */
+	private function setup_handle($url, $headers, $data, $options) {
+		$options['hooks']->dispatch('curl.before_request', [&$this->handle]);
+
+		// Force closing the connection for old versions of cURL (<7.22).
+		if (!isset($headers['Connection'])) {
+			$headers['Connection'] = 'close';
+		}
+
+		/**
+		 * Add "Expect" header.
+		 *
+		 * By default, cURL adds a "Expect: 100-Continue" to most requests. This header can
+		 * add as much as a second to the time it takes for cURL to perform a request. To
+		 * prevent this, we need to set an empty "Expect" header. To match the behaviour of
+		 * Guzzle, we'll add the empty header to requests that are smaller than 1 MB and use
+		 * HTTP/1.1.
+		 *
+		 * https://curl.se/mail/lib-2017-07/0013.html
+		 */
+		if (!isset($headers['Expect']) && $options['protocol_version'] === 1.1) {
+			$headers['Expect'] = $this->get_expect_header($data);
+		}
+
+		$headers = Requests::flatten($headers);
+
+		if (!empty($data)) {
+			$data_format = $options['data_format'];
+
+			if ($data_format === 'query') {
+				$url  = self::format_get($url, $data);
+				$data = '';
+			} elseif (!is_string($data)) {
+				$data = http_build_query($data, '', '&');
+			}
+		}
+
+		switch ($options['type']) {
+			case Requests::POST:
+				curl_setopt($this->handle, CURLOPT_POST, true);
+				curl_setopt($this->handle, CURLOPT_POSTFIELDS, $data);
+				break;
+			case Requests::HEAD:
+				curl_setopt($this->handle, CURLOPT_CUSTOMREQUEST, $options['type']);
+				curl_setopt($this->handle, CURLOPT_NOBODY, true);
+				break;
+			case Requests::TRACE:
+				curl_setopt($this->handle, CURLOPT_CUSTOMREQUEST, $options['type']);
+				break;
+			case Requests::PATCH:
+			case Requests::PUT:
+			case Requests::DELETE:
+			case Requests::OPTIONS:
+			default:
+				curl_setopt($this->handle, CURLOPT_CUSTOMREQUEST, $options['type']);
+				if (!empty($data)) {
+					curl_setopt($this->handle, CURLOPT_POSTFIELDS, $data);
+				}
+		}
+
+		// cURL requires a minimum timeout of 1 second when using the system
+		// DNS resolver, as it uses `alarm()`, which is second resolution only.
+		// There's no way to detect which DNS resolver is being used from our
+		// end, so we need to round up regardless of the supplied timeout.
+		//
+		// https://github.com/curl/curl/blob/4f45240bc84a9aa648c8f7243be7b79e9f9323a5/lib/hostip.c#L606-L609
+		$timeout = max($options['timeout'], 1);
+
+		if (is_int($timeout) || $this->version < self::CURL_7_16_2) {
+			curl_setopt($this->handle, CURLOPT_TIMEOUT, ceil($timeout));
+		} else {
+			// phpcs:ignore PHPCompatibility.Constants.NewConstants.curlopt_timeout_msFound
+			curl_setopt($this->handle, CURLOPT_TIMEOUT_MS, round($timeout * 1000));
+		}
+
+		if (is_int($options['connect_timeout']) || $this->version < self::CURL_7_16_2) {
+			curl_setopt($this->handle, CURLOPT_CONNECTTIMEOUT, ceil($options['connect_timeout']));
+		} else {
+			// phpcs:ignore PHPCompatibility.Constants.NewConstants.curlopt_connecttimeout_msFound
+			curl_setopt($this->handle, CURLOPT_CONNECTTIMEOUT_MS, round($options['connect_timeout'] * 1000));
+		}
+
+		curl_setopt($this->handle, CURLOPT_URL, $url);
+		curl_setopt($this->handle, CURLOPT_USERAGENT, $options['useragent']);
+		if (!empty($headers)) {
+			curl_setopt($this->handle, CURLOPT_HTTPHEADER, $headers);
+		}
+
+		if ($options['protocol_version'] === 1.1) {
+			curl_setopt($this->handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
+		} else {
+			curl_setopt($this->handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
+		}
+
+		if ($options['blocking'] === true) {
+			curl_setopt($this->handle, CURLOPT_HEADERFUNCTION, [$this, 'stream_headers']);
+			curl_setopt($this->handle, CURLOPT_WRITEFUNCTION, [$this, 'stream_body']);
+			curl_setopt($this->handle, CURLOPT_BUFFERSIZE, Requests::BUFFER_SIZE);
+		}
+	}
+
+	/**
+	 * Process a response
+	 *
+	 * @param string $response Response data from the body
+	 * @param array $options Request options
+	 * @return string|false HTTP response data including headers. False if non-blocking.
+	 * @throws \WpOrg\Requests\Exception If the request resulted in a cURL error.
+	 */
+	public function process_response($response, $options) {
+		if ($options['blocking'] === false) {
+			$fake_headers = '';
+			$options['hooks']->dispatch('curl.after_request', [&$fake_headers]);
+			return false;
+		}
+
+		if ($options['filename'] !== false && $this->stream_handle) {
+			fclose($this->stream_handle);
+			$this->headers = trim($this->headers);
+		} else {
+			$this->headers .= $response;
+		}
+
+		if (curl_errno($this->handle)) {
+			$error = sprintf(
+				'cURL error %s: %s',
+				curl_errno($this->handle),
+				curl_error($this->handle)
+			);
+			throw new Exception($error, 'curlerror', $this->handle);
+		}
+
+		$this->info = curl_getinfo($this->handle);
+
+		$options['hooks']->dispatch('curl.after_request', [&$this->headers, &$this->info]);
+		return $this->headers;
+	}
+
+	/**
+	 * Collect the headers as they are received
+	 *
+	 * @param resource|\CurlHandle $handle cURL handle
+	 * @param string $headers Header string
+	 * @return integer Length of provided header
+	 */
+	public function stream_headers($handle, $headers) {
+		// Why do we do this? cURL will send both the final response and any
+		// interim responses, such as a 100 Continue. We don't need that.
+		// (We may want to keep this somewhere just in case)
+		if ($this->done_headers) {
+			$this->headers      = '';
+			$this->done_headers = false;
+		}
+
+		$this->headers .= $headers;
+
+		if ($headers === "\r\n") {
+			$this->done_headers = true;
+		}
+
+		return strlen($headers);
+	}
+
+	/**
+	 * Collect data as it's received
+	 *
+	 * @since 1.6.1
+	 *
+	 * @param resource|\CurlHandle $handle cURL handle
+	 * @param string $data Body data
+	 * @return integer Length of provided data
+	 */
+	public function stream_body($handle, $data) {
+		$this->hooks->dispatch('request.progress', [$data, $this->response_bytes, $this->response_byte_limit]);
+		$data_length = strlen($data);
+
+		// Are we limiting the response size?
+		if ($this->response_byte_limit) {
+			if ($this->response_bytes === $this->response_byte_limit) {
+				// Already at maximum, move on
+				return $data_length;
+			}
+
+			if (($this->response_bytes + $data_length) > $this->response_byte_limit) {
+				// Limit the length
+				$limited_length = ($this->response_byte_limit - $this->response_bytes);
+				$data           = substr($data, 0, $limited_length);
+			}
+		}
+
+		if ($this->stream_handle) {
+			fwrite($this->stream_handle, $data);
+		} else {
+			$this->response_data .= $data;
+		}
+
+		$this->response_bytes += strlen($data);
+		return $data_length;
+	}
+
+	/**
+	 * Format a URL given GET data
+	 *
+	 * @param string       $url  Original URL.
+	 * @param array|object $data Data to build query using, see {@link https://www.php.net/http_build_query}
+	 * @return string URL with data
+	 */
+	private static function format_get($url, $data) {
+		if (!empty($data)) {
+			$query     = '';
+			$url_parts = parse_url($url);
+			if (empty($url_parts['query'])) {
+				$url_parts['query'] = '';
+			} else {
+				$query = $url_parts['query'];
+			}
+
+			$query .= '&' . http_build_query($data, '', '&');
+			$query  = trim($query, '&');
+
+			if (empty($url_parts['query'])) {
+				$url .= '?' . $query;
+			} else {
+				$url = str_replace($url_parts['query'], $query, $url);
+			}
+		}
+
+		return $url;
+	}
+
+	/**
+	 * Self-test whether the transport can be used.
+	 *
+	 * The available capabilities to test for can be found in {@see \WpOrg\Requests\Capability}.
+	 *
+	 * @codeCoverageIgnore
+	 * @param array<string, bool> $capabilities Optional. Associative array of capabilities to test against, i.e. `['<capability>' => true]`.
+	 * @return bool Whether the transport can be used.
+	 */
+	public static function test($capabilities = []) {
+		if (!function_exists('curl_init') || !function_exists('curl_exec')) {
+			return false;
+		}
+
+		// If needed, check that our installed curl version supports SSL
+		if (isset($capabilities[Capability::SSL]) && $capabilities[Capability::SSL]) {
+			$curl_version = curl_version();
+			if (!(CURL_VERSION_SSL & $curl_version['features'])) {
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * Get the correct "Expect" header for the given request data.
+	 *
+	 * @param string|array $data Data to send either as the POST body, or as parameters in the URL for a GET/HEAD.
+	 * @return string The "Expect" header.
+	 */
+	private function get_expect_header($data) {
+		if (!is_array($data)) {
+			return strlen((string) $data) >= 1048576 ? '100-Continue' : '';
+		}
+
+		$bytesize = 0;
+		$iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($data));
+
+		foreach ($iterator as $datum) {
+			$bytesize += strlen((string) $datum);
+
+			if ($bytesize >= 1048576) {
+				return '100-Continue';
+			}
+		}
+
+		return '';
+	}
+}
diff --git a/wp-includes/Requests/src/Transport/Fsockopen.php b/wp-includes/Requests/src/Transport/Fsockopen.php
new file mode 100644
index 0000000..2b53d0c
--- /dev/null
+++ b/wp-includes/Requests/src/Transport/Fsockopen.php
@@ -0,0 +1,510 @@
+<?php
+/**
+ * fsockopen HTTP transport
+ *
+ * @package Requests\Transport
+ */
+
+namespace WpOrg\Requests\Transport;
+
+use WpOrg\Requests\Capability;
+use WpOrg\Requests\Exception;
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Port;
+use WpOrg\Requests\Requests;
+use WpOrg\Requests\Ssl;
+use WpOrg\Requests\Transport;
+use WpOrg\Requests\Utility\CaseInsensitiveDictionary;
+use WpOrg\Requests\Utility\InputValidator;
+
+/**
+ * fsockopen HTTP transport
+ *
+ * @package Requests\Transport
+ */
+final class Fsockopen implements Transport {
+	/**
+	 * Second to microsecond conversion
+	 *
+	 * @var integer
+	 */
+	const SECOND_IN_MICROSECONDS = 1000000;
+
+	/**
+	 * Raw HTTP data
+	 *
+	 * @var string
+	 */
+	public $headers = '';
+
+	/**
+	 * Stream metadata
+	 *
+	 * @var array Associative array of properties, see {@link https://www.php.net/stream_get_meta_data}
+	 */
+	public $info;
+
+	/**
+	 * What's the maximum number of bytes we should keep?
+	 *
+	 * @var int|bool Byte count, or false if no limit.
+	 */
+	private $max_bytes = false;
+
+	/**
+	 * Cache for received connection errors.
+	 *
+	 * @var string
+	 */
+	private $connect_error = '';
+
+	/**
+	 * Perform a request
+	 *
+	 * @param string|Stringable $url URL to request
+	 * @param array $headers Associative array of request headers
+	 * @param string|array $data Data to send either as the POST body, or as parameters in the URL for a GET/HEAD
+	 * @param array $options Request options, see {@see \WpOrg\Requests\Requests::response()} for documentation
+	 * @return string Raw HTTP result
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $url argument is not a string or Stringable.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $headers argument is not an array.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $data parameter is not an array or string.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $options argument is not an array.
+	 * @throws \WpOrg\Requests\Exception       On failure to connect to socket (`fsockopenerror`)
+	 * @throws \WpOrg\Requests\Exception       On socket timeout (`timeout`)
+	 */
+	public function request($url, $headers = [], $data = [], $options = []) {
+		if (InputValidator::is_string_or_stringable($url) === false) {
+			throw InvalidArgument::create(1, '$url', 'string|Stringable', gettype($url));
+		}
+
+		if (is_array($headers) === false) {
+			throw InvalidArgument::create(2, '$headers', 'array', gettype($headers));
+		}
+
+		if (!is_array($data) && !is_string($data)) {
+			if ($data === null) {
+				$data = '';
+			} else {
+				throw InvalidArgument::create(3, '$data', 'array|string', gettype($data));
+			}
+		}
+
+		if (is_array($options) === false) {
+			throw InvalidArgument::create(4, '$options', 'array', gettype($options));
+		}
+
+		$options['hooks']->dispatch('fsockopen.before_request');
+
+		$url_parts = parse_url($url);
+		if (empty($url_parts)) {
+			throw new Exception('Invalid URL.', 'invalidurl', $url);
+		}
+
+		$host                     = $url_parts['host'];
+		$context                  = stream_context_create();
+		$verifyname               = false;
+		$case_insensitive_headers = new CaseInsensitiveDictionary($headers);
+
+		// HTTPS support
+		if (isset($url_parts['scheme']) && strtolower($url_parts['scheme']) === 'https') {
+			$remote_socket = 'ssl://' . $host;
+			if (!isset($url_parts['port'])) {
+				$url_parts['port'] = Port::HTTPS;
+			}
+
+			$context_options = [
+				'verify_peer'       => true,
+				'capture_peer_cert' => true,
+			];
+			$verifyname      = true;
+
+			// SNI, if enabled (OpenSSL >=0.9.8j)
+			// phpcs:ignore PHPCompatibility.Constants.NewConstants.openssl_tlsext_server_nameFound
+			if (defined('OPENSSL_TLSEXT_SERVER_NAME') && OPENSSL_TLSEXT_SERVER_NAME) {
+				$context_options['SNI_enabled'] = true;
+				if (isset($options['verifyname']) && $options['verifyname'] === false) {
+					$context_options['SNI_enabled'] = false;
+				}
+			}
+
+			if (isset($options['verify'])) {
+				if ($options['verify'] === false) {
+					$context_options['verify_peer']      = false;
+					$context_options['verify_peer_name'] = false;
+					$verifyname                          = false;
+				} elseif (is_string($options['verify'])) {
+					$context_options['cafile'] = $options['verify'];
+				}
+			}
+
+			if (isset($options['verifyname']) && $options['verifyname'] === false) {
+				$context_options['verify_peer_name'] = false;
+				$verifyname                          = false;
+			}
+
+			stream_context_set_option($context, ['ssl' => $context_options]);
+		} else {
+			$remote_socket = 'tcp://' . $host;
+		}
+
+		$this->max_bytes = $options['max_bytes'];
+
+		if (!isset($url_parts['port'])) {
+			$url_parts['port'] = Port::HTTP;
+		}
+
+		$remote_socket .= ':' . $url_parts['port'];
+
+		// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_set_error_handler
+		set_error_handler([$this, 'connect_error_handler'], E_WARNING | E_NOTICE);
+
+		$options['hooks']->dispatch('fsockopen.remote_socket', [&$remote_socket]);
+
+		$socket = stream_socket_client($remote_socket, $errno, $errstr, ceil($options['connect_timeout']), STREAM_CLIENT_CONNECT, $context);
+
+		restore_error_handler();
+
+		if ($verifyname && !$this->verify_certificate_from_context($host, $context)) {
+			throw new Exception('SSL certificate did not match the requested domain name', 'ssl.no_match');
+		}
+
+		if (!$socket) {
+			if ($errno === 0) {
+				// Connection issue
+				throw new Exception(rtrim($this->connect_error), 'fsockopen.connect_error');
+			}
+
+			throw new Exception($errstr, 'fsockopenerror', null, $errno);
+		}
+
+		$data_format = $options['data_format'];
+
+		if ($data_format === 'query') {
+			$path = self::format_get($url_parts, $data);
+			$data = '';
+		} else {
+			$path = self::format_get($url_parts, []);
+		}
+
+		$options['hooks']->dispatch('fsockopen.remote_host_path', [&$path, $url]);
+
+		$request_body = '';
+		$out          = sprintf("%s %s HTTP/%.1F\r\n", $options['type'], $path, $options['protocol_version']);
+
+		if ($options['type'] !== Requests::TRACE) {
+			if (is_array($data)) {
+				$request_body = http_build_query($data, '', '&');
+			} else {
+				$request_body = $data;
+			}
+
+			// Always include Content-length on POST requests to prevent
+			// 411 errors from some servers when the body is empty.
+			if (!empty($data) || $options['type'] === Requests::POST) {
+				if (!isset($case_insensitive_headers['Content-Length'])) {
+					$headers['Content-Length'] = strlen($request_body);
+				}
+
+				if (!isset($case_insensitive_headers['Content-Type'])) {
+					$headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8';
+				}
+			}
+		}
+
+		if (!isset($case_insensitive_headers['Host'])) {
+			$out         .= sprintf('Host: %s', $url_parts['host']);
+			$scheme_lower = strtolower($url_parts['scheme']);
+
+			if (($scheme_lower === 'http' && $url_parts['port'] !== Port::HTTP) || ($scheme_lower === 'https' && $url_parts['port'] !== Port::HTTPS)) {
+				$out .= ':' . $url_parts['port'];
+			}
+
+			$out .= "\r\n";
+		}
+
+		if (!isset($case_insensitive_headers['User-Agent'])) {
+			$out .= sprintf("User-Agent: %s\r\n", $options['useragent']);
+		}
+
+		$accept_encoding = $this->accept_encoding();
+		if (!isset($case_insensitive_headers['Accept-Encoding']) && !empty($accept_encoding)) {
+			$out .= sprintf("Accept-Encoding: %s\r\n", $accept_encoding);
+		}
+
+		$headers = Requests::flatten($headers);
+
+		if (!empty($headers)) {
+			$out .= implode("\r\n", $headers) . "\r\n";
+		}
+
+		$options['hooks']->dispatch('fsockopen.after_headers', [&$out]);
+
+		if (substr($out, -2) !== "\r\n") {
+			$out .= "\r\n";
+		}
+
+		if (!isset($case_insensitive_headers['Connection'])) {
+			$out .= "Connection: Close\r\n";
+		}
+
+		$out .= "\r\n" . $request_body;
+
+		$options['hooks']->dispatch('fsockopen.before_send', [&$out]);
+
+		fwrite($socket, $out);
+		$options['hooks']->dispatch('fsockopen.after_send', [$out]);
+
+		if (!$options['blocking']) {
+			fclose($socket);
+			$fake_headers = '';
+			$options['hooks']->dispatch('fsockopen.after_request', [&$fake_headers]);
+			return '';
+		}
+
+		$timeout_sec = (int) floor($options['timeout']);
+		if ($timeout_sec === $options['timeout']) {
+			$timeout_msec = 0;
+		} else {
+			$timeout_msec = self::SECOND_IN_MICROSECONDS * $options['timeout'] % self::SECOND_IN_MICROSECONDS;
+		}
+
+		stream_set_timeout($socket, $timeout_sec, $timeout_msec);
+
+		$response   = '';
+		$body       = '';
+		$headers    = '';
+		$this->info = stream_get_meta_data($socket);
+		$size       = 0;
+		$doingbody  = false;
+		$download   = false;
+		if ($options['filename']) {
+			// phpcs:ignore WordPress.PHP.NoSilencedErrors -- Silenced the PHP native warning in favour of throwing an exception.
+			$download = @fopen($options['filename'], 'wb');
+			if ($download === false) {
+				$error = error_get_last();
+				throw new Exception($error['message'], 'fopen');
+			}
+		}
+
+		while (!feof($socket)) {
+			$this->info = stream_get_meta_data($socket);
+			if ($this->info['timed_out']) {
+				throw new Exception('fsocket timed out', 'timeout');
+			}
+
+			$block = fread($socket, Requests::BUFFER_SIZE);
+			if (!$doingbody) {
+				$response .= $block;
+				if (strpos($response, "\r\n\r\n")) {
+					list($headers, $block) = explode("\r\n\r\n", $response, 2);
+					$doingbody             = true;
+				}
+			}
+
+			// Are we in body mode now?
+			if ($doingbody) {
+				$options['hooks']->dispatch('request.progress', [$block, $size, $this->max_bytes]);
+				$data_length = strlen($block);
+				if ($this->max_bytes) {
+					// Have we already hit a limit?
+					if ($size === $this->max_bytes) {
+						continue;
+					}
+
+					if (($size + $data_length) > $this->max_bytes) {
+						// Limit the length
+						$limited_length = ($this->max_bytes - $size);
+						$block          = substr($block, 0, $limited_length);
+					}
+				}
+
+				$size += strlen($block);
+				if ($download) {
+					fwrite($download, $block);
+				} else {
+					$body .= $block;
+				}
+			}
+		}
+
+		$this->headers = $headers;
+
+		if ($download) {
+			fclose($download);
+		} else {
+			$this->headers .= "\r\n\r\n" . $body;
+		}
+
+		fclose($socket);
+
+		$options['hooks']->dispatch('fsockopen.after_request', [&$this->headers, &$this->info]);
+		return $this->headers;
+	}
+
+	/**
+	 * Send multiple requests simultaneously
+	 *
+	 * @param array $requests Request data (array of 'url', 'headers', 'data', 'options') as per {@see \WpOrg\Requests\Transport::request()}
+	 * @param array $options Global options, see {@see \WpOrg\Requests\Requests::response()} for documentation
+	 * @return array Array of \WpOrg\Requests\Response objects (may contain \WpOrg\Requests\Exception or string responses as well)
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $requests argument is not an array or iterable object with array access.
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $options argument is not an array.
+	 */
+	public function request_multiple($requests, $options) {
+		// If you're not requesting, we can't get any responses ¯\_(ツ)_/¯
+		if (empty($requests)) {
+			return [];
+		}
+
+		if (InputValidator::has_array_access($requests) === false || InputValidator::is_iterable($requests) === false) {
+			throw InvalidArgument::create(1, '$requests', 'array|ArrayAccess&Traversable', gettype($requests));
+		}
+
+		if (is_array($options) === false) {
+			throw InvalidArgument::create(2, '$options', 'array', gettype($options));
+		}
+
+		$responses = [];
+		$class     = get_class($this);
+		foreach ($requests as $id => $request) {
+			try {
+				$handler        = new $class();
+				$responses[$id] = $handler->request($request['url'], $request['headers'], $request['data'], $request['options']);
+
+				$request['options']['hooks']->dispatch('transport.internal.parse_response', [&$responses[$id], $request]);
+			} catch (Exception $e) {
+				$responses[$id] = $e;
+			}
+
+			if (!is_string($responses[$id])) {
+				$request['options']['hooks']->dispatch('multiple.request.complete', [&$responses[$id], $id]);
+			}
+		}
+
+		return $responses;
+	}
+
+	/**
+	 * Retrieve the encodings we can accept
+	 *
+	 * @return string Accept-Encoding header value
+	 */
+	private static function accept_encoding() {
+		$type = [];
+		if (function_exists('gzinflate')) {
+			$type[] = 'deflate;q=1.0';
+		}
+
+		if (function_exists('gzuncompress')) {
+			$type[] = 'compress;q=0.5';
+		}
+
+		$type[] = 'gzip;q=0.5';
+
+		return implode(', ', $type);
+	}
+
+	/**
+	 * Format a URL given GET data
+	 *
+	 * @param array        $url_parts Array of URL parts as received from {@link https://www.php.net/parse_url}
+	 * @param array|object $data Data to build query using, see {@link https://www.php.net/http_build_query}
+	 * @return string URL with data
+	 */
+	private static function format_get($url_parts, $data) {
+		if (!empty($data)) {
+			if (empty($url_parts['query'])) {
+				$url_parts['query'] = '';
+			}
+
+			$url_parts['query'] .= '&' . http_build_query($data, '', '&');
+			$url_parts['query']  = trim($url_parts['query'], '&');
+		}
+
+		if (isset($url_parts['path'])) {
+			if (isset($url_parts['query'])) {
+				$get = $url_parts['path'] . '?' . $url_parts['query'];
+			} else {
+				$get = $url_parts['path'];
+			}
+		} else {
+			$get = '/';
+		}
+
+		return $get;
+	}
+
+	/**
+	 * Error handler for stream_socket_client()
+	 *
+	 * @param int $errno Error number (e.g. E_WARNING)
+	 * @param string $errstr Error message
+	 */
+	public function connect_error_handler($errno, $errstr) {
+		// Double-check we can handle it
+		if (($errno & E_WARNING) === 0 && ($errno & E_NOTICE) === 0) {
+			// Return false to indicate the default error handler should engage
+			return false;
+		}
+
+		$this->connect_error .= $errstr . "\n";
+		return true;
+	}
+
+	/**
+	 * Verify the certificate against common name and subject alternative names
+	 *
+	 * Unfortunately, PHP doesn't check the certificate against the alternative
+	 * names, leading things like 'https://www.github.com/' to be invalid.
+	 * Instead
+	 *
+	 * @link https://tools.ietf.org/html/rfc2818#section-3.1 RFC2818, Section 3.1
+	 *
+	 * @param string $host Host name to verify against
+	 * @param resource $context Stream context
+	 * @return bool
+	 *
+	 * @throws \WpOrg\Requests\Exception On failure to connect via TLS (`fsockopen.ssl.connect_error`)
+	 * @throws \WpOrg\Requests\Exception On not obtaining a match for the host (`fsockopen.ssl.no_match`)
+	 */
+	public function verify_certificate_from_context($host, $context) {
+		$meta = stream_context_get_options($context);
+
+		// If we don't have SSL options, then we couldn't make the connection at
+		// all
+		if (empty($meta) || empty($meta['ssl']) || empty($meta['ssl']['peer_certificate'])) {
+			throw new Exception(rtrim($this->connect_error), 'ssl.connect_error');
+		}
+
+		$cert = openssl_x509_parse($meta['ssl']['peer_certificate']);
+
+		return Ssl::verify_certificate($host, $cert);
+	}
+
+	/**
+	 * Self-test whether the transport can be used.
+	 *
+	 * The available capabilities to test for can be found in {@see \WpOrg\Requests\Capability}.
+	 *
+	 * @codeCoverageIgnore
+	 * @param array<string, bool> $capabilities Optional. Associative array of capabilities to test against, i.e. `['<capability>' => true]`.
+	 * @return bool Whether the transport can be used.
+	 */
+	public static function test($capabilities = []) {
+		if (!function_exists('fsockopen')) {
+			return false;
+		}
+
+		// If needed, check that streams support SSL
+		if (isset($capabilities[Capability::SSL]) && $capabilities[Capability::SSL]) {
+			if (!extension_loaded('openssl') || !function_exists('openssl_x509_parse')) {
+				return false;
+			}
+		}
+
+		return true;
+	}
+}
diff --git a/wp-includes/Requests/src/Utility/CaseInsensitiveDictionary.php b/wp-includes/Requests/src/Utility/CaseInsensitiveDictionary.php
new file mode 100644
index 0000000..0e1a914
--- /dev/null
+++ b/wp-includes/Requests/src/Utility/CaseInsensitiveDictionary.php
@@ -0,0 +1,127 @@
+<?php
+/**
+ * Case-insensitive dictionary, suitable for HTTP headers
+ *
+ * @package Requests\Utilities
+ */
+
+namespace WpOrg\Requests\Utility;
+
+use ArrayAccess;
+use ArrayIterator;
+use IteratorAggregate;
+use ReturnTypeWillChange;
+use WpOrg\Requests\Exception;
+
+/**
+ * Case-insensitive dictionary, suitable for HTTP headers
+ *
+ * @package Requests\Utilities
+ */
+class CaseInsensitiveDictionary implements ArrayAccess, IteratorAggregate {
+	/**
+	 * Actual item data
+	 *
+	 * @var array
+	 */
+	protected $data = [];
+
+	/**
+	 * Creates a case insensitive dictionary.
+	 *
+	 * @param array $data Dictionary/map to convert to case-insensitive
+	 */
+	public function __construct(array $data = []) {
+		foreach ($data as $offset => $value) {
+			$this->offsetSet($offset, $value);
+		}
+	}
+
+	/**
+	 * Check if the given item exists
+	 *
+	 * @param string $offset Item key
+	 * @return boolean Does the item exist?
+	 */
+	#[ReturnTypeWillChange]
+	public function offsetExists($offset) {
+		if (is_string($offset)) {
+			$offset = strtolower($offset);
+		}
+
+		return isset($this->data[$offset]);
+	}
+
+	/**
+	 * Get the value for the item
+	 *
+	 * @param string $offset Item key
+	 * @return string|null Item value (null if the item key doesn't exist)
+	 */
+	#[ReturnTypeWillChange]
+	public function offsetGet($offset) {
+		if (is_string($offset)) {
+			$offset = strtolower($offset);
+		}
+
+		if (!isset($this->data[$offset])) {
+			return null;
+		}
+
+		return $this->data[$offset];
+	}
+
+	/**
+	 * Set the given item
+	 *
+	 * @param string $offset Item name
+	 * @param string $value Item value
+	 *
+	 * @throws \WpOrg\Requests\Exception On attempting to use dictionary as list (`invalidset`)
+	 */
+	#[ReturnTypeWillChange]
+	public function offsetSet($offset, $value) {
+		if ($offset === null) {
+			throw new Exception('Object is a dictionary, not a list', 'invalidset');
+		}
+
+		if (is_string($offset)) {
+			$offset = strtolower($offset);
+		}
+
+		$this->data[$offset] = $value;
+	}
+
+	/**
+	 * Unset the given header
+	 *
+	 * @param string $offset The key for the item to unset.
+	 */
+	#[ReturnTypeWillChange]
+	public function offsetUnset($offset) {
+		if (is_string($offset)) {
+			$offset = strtolower($offset);
+		}
+
+		unset($this->data[$offset]);
+	}
+
+	/**
+	 * Get an iterator for the data
+	 *
+	 * @return \ArrayIterator
+	 */
+	#[ReturnTypeWillChange]
+	public function getIterator() {
+		return new ArrayIterator($this->data);
+	}
+
+	/**
+	 * Get the headers as an array
+	 *
+	 * @return array Header data
+	 */
+	public function getAll() {
+		return $this->data;
+	}
+}
diff --git a/wp-includes/Requests/src/Utility/FilteredIterator.php b/wp-includes/Requests/src/Utility/FilteredIterator.php
new file mode 100644
index 0000000..4865966
--- /dev/null
+++ b/wp-includes/Requests/src/Utility/FilteredIterator.php
@@ -0,0 +1,97 @@
+<?php
+/**
+ * Iterator for arrays requiring filtered values
+ *
+ * @package Requests\Utilities
+ */
+
+namespace WpOrg\Requests\Utility;
+
+use ArrayIterator;
+use ReturnTypeWillChange;
+use WpOrg\Requests\Exception\InvalidArgument;
+use WpOrg\Requests\Utility\InputValidator;
+
+/**
+ * Iterator for arrays requiring filtered values
+ *
+ * @package Requests\Utilities
+ */
+final class FilteredIterator extends ArrayIterator {
+	/**
+	 * Callback to run as a filter
+	 *
+	 * @var callable
+	 */
+	private $callback;
+
+	/**
+	 * Create a new iterator
+	 *
+	 * @param array    $data     The array or object to be iterated on.
+	 * @param callable $callback Callback to be called on each value
+	 *
+	 * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $data argument is not iterable.
+	 */
+	public function __construct($data, $callback) {
+		if (InputValidator::is_iterable($data) === false) {
+			throw InvalidArgument::create(1, '$data', 'iterable', gettype($data));
+		}
+
+		parent::__construct($data);
+
+		if (is_callable($callback)) {
+			$this->callback = $callback;
+		}
+	}
+
+	/**
+	 * Prevent unserialization of the object for security reasons.
+	 *
+	 * @phpcs:disable PHPCompatibility.FunctionNameRestrictions.NewMagicMethods.__unserializeFound
+	 *
+	 * @param array $data Restored array of data originally serialized.
+	 *
+	 * @return void
+	 */
+	#[ReturnTypeWillChange]
+	public function __unserialize($data) {}
+	// phpcs:enable
+
+	/**
+	 * Perform reinitialization tasks.
+	 *
+	 * Prevents a callback from being injected during unserialization of an object.
+	 *
+	 * @return void
+	 */
+	public function __wakeup() {
+		unset($this->callback);
+	}
+
+	/**
+	 * Get the current item's value after filtering
+	 *
+	 * @return string
+	 */
+	#[ReturnTypeWillChange]
+	public function current() {
+		$value = parent::current();
+
+		if (is_callable($this->callback)) {
+			$value = call_user_func($this->callback, $value);
+		}
+
+		return $value;
+	}
+
+	/**
+	 * Prevent creating a PHP value from a stored representation of the object for security reasons.
+	 *
+	 * @param string $data The serialized string.
+	 *
+	 * @return void
+	 */
+	#[ReturnTypeWillChange]
+	public function unserialize($data) {}
+}
diff --git a/wp-includes/Requests/src/Utility/InputValidator.php b/wp-includes/Requests/src/Utility/InputValidator.php
new file mode 100644
index 0000000..7c10d61
--- /dev/null
+++ b/wp-includes/Requests/src/Utility/InputValidator.php
@@ -0,0 +1,109 @@
+<?php
+/**
+ * Input validation utilities.
+ *
+ * @package Requests\Utilities
+ */
+
+namespace WpOrg\Requests\Utility;
+
+use ArrayAccess;
+use CurlHandle;
+use Traversable;
+
+/**
+ * Input validation utilities.
+ *
+ * @package Requests\Utilities
+ */
+final class InputValidator {
+
+	/**
+	 * Verify that a received input parameter is of type string or is "stringable".
+	 *
+	 * @param mixed $input Input parameter to verify.
+	 *
+	 * @return bool
+	 */
+	public static function is_string_or_stringable($input) {
+		return is_string($input) || self::is_stringable_object($input);
+	}
+
+	/**
+	 * Verify whether a received input parameter is usable as an integer array key.
+	 *
+	 * @param mixed $input Input parameter to verify.
+	 *
+	 * @return bool
+	 */
+	public static function is_numeric_array_key($input) {
+		if (is_int($input)) {
+			return true;
+		}
+
+		if (!is_string($input)) {
+			return false;
+		}
+
+		return (bool) preg_match('`^-?[0-9]+$`', $input);
+	}
+
+	/**
+	 * Verify whether a received input parameter is "stringable".
+	 *
+	 * @param mixed $input Input parameter to verify.
+	 *
+	 * @return bool
+	 */
+	public static function is_stringable_object($input) {
+		return is_object($input) && method_exists($input, '__toString');
+	}
+
+	/**
+	 * Verify whether a received input parameter is _accessible as if it were an array_.
+	 *
+	 * @param mixed $input Input parameter to verify.
+	 *
+	 * @return bool
+	 */
+	public static function has_array_access($input) {
+		return is_array($input) || $input instanceof ArrayAccess;
+	}
+
+	/**
+	 * Verify whether a received input parameter is "iterable".
+	 *
+	 * @internal The PHP native `is_iterable()` function was only introduced in PHP 7.1
+	 * and this library still supports PHP 5.6.
+	 *
+	 * @param mixed $input Input parameter to verify.
+	 *
+	 * @return bool
+	 */
+	public static function is_iterable($input) {
+		return is_array($input) || $input instanceof Traversable;
+	}
+
+	/**
+	 * Verify whether a received input parameter is a Curl handle.
+	 *
+	 * The PHP Curl extension worked with resources prior to PHP 8.0 and with
+	 * an instance of the `CurlHandle` class since PHP 8.0.
+	 * {@link https://www.php.net/manual/en/migration80.incompatible.php#migration80.incompatible.resource2object}
+	 *
+	 * @param mixed $input Input parameter to verify.
+	 *
+	 * @return bool
+	 */
+	public static function is_curl_handle($input) {
+		if (is_resource($input)) {
+			return get_resource_type($input) === 'curl';
+		}
+
+		if (is_object($input)) {
+			return $input instanceof CurlHandle;
+		}
+
+		return false;
+	}
+}
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