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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 07:56:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 07:56:49 +0000
commita415c29efee45520ae252d2aa28f1083a521cd7b (patch)
treef4ade4b6668ecc0765de7e1424f7c1427ad433ff /wp-includes/http.php
parentInitial commit. (diff)
downloadwordpress-a415c29efee45520ae252d2aa28f1083a521cd7b.tar.xz
wordpress-a415c29efee45520ae252d2aa28f1083a521cd7b.zip
Adding upstream version 6.4.3+dfsg1.upstream/6.4.3+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--wp-includes/http.php783
1 files changed, 783 insertions, 0 deletions
diff --git a/wp-includes/http.php b/wp-includes/http.php
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+<?php
+/**
+ * Core HTTP Request API
+ *
+ * Standardizes the HTTP requests for WordPress. Handles cookies, gzip encoding and decoding, chunk
+ * decoding, if HTTP 1.1 and various other difficult HTTP protocol implementations.
+ *
+ * @package WordPress
+ * @subpackage HTTP
+ */
+
+/**
+ * Returns the initialized WP_Http Object
+ *
+ * @since 2.7.0
+ * @access private
+ *
+ * @return WP_Http HTTP Transport object.
+ */
+function _wp_http_get_object() {
+ static $http = null;
+
+ if ( is_null( $http ) ) {
+ $http = new WP_Http();
+ }
+ return $http;
+}
+
+/**
+ * Retrieve the raw response from a safe HTTP request.
+ *
+ * This function is ideal when the HTTP request is being made to an arbitrary
+ * URL. The URL is validated to avoid redirection and request forgery attacks.
+ *
+ * @since 3.6.0
+ *
+ * @see wp_remote_request() For more information on the response array format.
+ * @see WP_Http::request() For default arguments information.
+ *
+ * @param string $url URL to retrieve.
+ * @param array $args Optional. Request arguments. Default empty array.
+ * See WP_Http::request() for information on accepted arguments.
+ * @return array|WP_Error The response or WP_Error on failure.
+ */
+function wp_safe_remote_request( $url, $args = array() ) {
+ $args['reject_unsafe_urls'] = true;
+ $http = _wp_http_get_object();
+ return $http->request( $url, $args );
+}
+
+/**
+ * Retrieve the raw response from a safe HTTP request using the GET method.
+ *
+ * This function is ideal when the HTTP request is being made to an arbitrary
+ * URL. The URL is validated to avoid redirection and request forgery attacks.
+ *
+ * @since 3.6.0
+ *
+ * @see wp_remote_request() For more information on the response array format.
+ * @see WP_Http::request() For default arguments information.
+ *
+ * @param string $url URL to retrieve.
+ * @param array $args Optional. Request arguments. Default empty array.
+ * See WP_Http::request() for information on accepted arguments.
+ * @return array|WP_Error The response or WP_Error on failure.
+ */
+function wp_safe_remote_get( $url, $args = array() ) {
+ $args['reject_unsafe_urls'] = true;
+ $http = _wp_http_get_object();
+ return $http->get( $url, $args );
+}
+
+/**
+ * Retrieve the raw response from a safe HTTP request using the POST method.
+ *
+ * This function is ideal when the HTTP request is being made to an arbitrary
+ * URL. The URL is validated to avoid redirection and request forgery attacks.
+ *
+ * @since 3.6.0
+ *
+ * @see wp_remote_request() For more information on the response array format.
+ * @see WP_Http::request() For default arguments information.
+ *
+ * @param string $url URL to retrieve.
+ * @param array $args Optional. Request arguments. Default empty array.
+ * See WP_Http::request() for information on accepted arguments.
+ * @return array|WP_Error The response or WP_Error on failure.
+ */
+function wp_safe_remote_post( $url, $args = array() ) {
+ $args['reject_unsafe_urls'] = true;
+ $http = _wp_http_get_object();
+ return $http->post( $url, $args );
+}
+
+/**
+ * Retrieve the raw response from a safe HTTP request using the HEAD method.
+ *
+ * This function is ideal when the HTTP request is being made to an arbitrary
+ * URL. The URL is validated to avoid redirection and request forgery attacks.
+ *
+ * @since 3.6.0
+ *
+ * @see wp_remote_request() For more information on the response array format.
+ * @see WP_Http::request() For default arguments information.
+ *
+ * @param string $url URL to retrieve.
+ * @param array $args Optional. Request arguments. Default empty array.
+ * See WP_Http::request() for information on accepted arguments.
+ * @return array|WP_Error The response or WP_Error on failure.
+ */
+function wp_safe_remote_head( $url, $args = array() ) {
+ $args['reject_unsafe_urls'] = true;
+ $http = _wp_http_get_object();
+ return $http->head( $url, $args );
+}
+
+/**
+ * Performs an HTTP request and returns its response.
+ *
+ * There are other API functions available which abstract away the HTTP method:
+ *
+ * - Default 'GET' for wp_remote_get()
+ * - Default 'POST' for wp_remote_post()
+ * - Default 'HEAD' for wp_remote_head()
+ *
+ * @since 2.7.0
+ *
+ * @see WP_Http::request() For information on default arguments.
+ *
+ * @param string $url URL to retrieve.
+ * @param array $args Optional. Request arguments. Default empty array.
+ * See WP_Http::request() for information on accepted arguments.
+ * @return array|WP_Error {
+ * The response array or a WP_Error on failure.
+ *
+ * @type string[] $headers Array of response headers keyed by their name.
+ * @type string $body Response body.
+ * @type array $response {
+ * Data about the HTTP response.
+ *
+ * @type int|false $code HTTP response code.
+ * @type string|false $message HTTP response message.
+ * }
+ * @type WP_HTTP_Cookie[] $cookies Array of response cookies.
+ * @type WP_HTTP_Requests_Response|null $http_response Raw HTTP response object.
+ * }
+ */
+function wp_remote_request( $url, $args = array() ) {
+ $http = _wp_http_get_object();
+ return $http->request( $url, $args );
+}
+
+/**
+ * Performs an HTTP request using the GET method and returns its response.
+ *
+ * @since 2.7.0
+ *
+ * @see wp_remote_request() For more information on the response array format.
+ * @see WP_Http::request() For default arguments information.
+ *
+ * @param string $url URL to retrieve.
+ * @param array $args Optional. Request arguments. Default empty array.
+ * See WP_Http::request() for information on accepted arguments.
+ * @return array|WP_Error The response or WP_Error on failure.
+ */
+function wp_remote_get( $url, $args = array() ) {
+ $http = _wp_http_get_object();
+ return $http->get( $url, $args );
+}
+
+/**
+ * Performs an HTTP request using the POST method and returns its response.
+ *
+ * @since 2.7.0
+ *
+ * @see wp_remote_request() For more information on the response array format.
+ * @see WP_Http::request() For default arguments information.
+ *
+ * @param string $url URL to retrieve.
+ * @param array $args Optional. Request arguments. Default empty array.
+ * See WP_Http::request() for information on accepted arguments.
+ * @return array|WP_Error The response or WP_Error on failure.
+ */
+function wp_remote_post( $url, $args = array() ) {
+ $http = _wp_http_get_object();
+ return $http->post( $url, $args );
+}
+
+/**
+ * Performs an HTTP request using the HEAD method and returns its response.
+ *
+ * @since 2.7.0
+ *
+ * @see wp_remote_request() For more information on the response array format.
+ * @see WP_Http::request() For default arguments information.
+ *
+ * @param string $url URL to retrieve.
+ * @param array $args Optional. Request arguments. Default empty array.
+ * See WP_Http::request() for information on accepted arguments.
+ * @return array|WP_Error The response or WP_Error on failure.
+ */
+function wp_remote_head( $url, $args = array() ) {
+ $http = _wp_http_get_object();
+ return $http->head( $url, $args );
+}
+
+/**
+ * Retrieve only the headers from the raw response.
+ *
+ * @since 2.7.0
+ * @since 4.6.0 Return value changed from an array to an WpOrg\Requests\Utility\CaseInsensitiveDictionary instance.
+ *
+ * @see \WpOrg\Requests\Utility\CaseInsensitiveDictionary
+ *
+ * @param array|WP_Error $response HTTP response.
+ * @return \WpOrg\Requests\Utility\CaseInsensitiveDictionary|array The headers of the response, or empty array
+ * if incorrect parameter given.
+ */
+function wp_remote_retrieve_headers( $response ) {
+ if ( is_wp_error( $response ) || ! isset( $response['headers'] ) ) {
+ return array();
+ }
+
+ return $response['headers'];
+}
+
+/**
+ * Retrieve a single header by name from the raw response.
+ *
+ * @since 2.7.0
+ *
+ * @param array|WP_Error $response HTTP response.
+ * @param string $header Header name to retrieve value from.
+ * @return array|string The header(s) value(s). Array if multiple headers with the same name are retrieved.
+ * Empty string if incorrect parameter given, or if the header doesn't exist.
+ */
+function wp_remote_retrieve_header( $response, $header ) {
+ if ( is_wp_error( $response ) || ! isset( $response['headers'] ) ) {
+ return '';
+ }
+
+ if ( isset( $response['headers'][ $header ] ) ) {
+ return $response['headers'][ $header ];
+ }
+
+ return '';
+}
+
+/**
+ * Retrieve only the response code from the raw response.
+ *
+ * Will return an empty string if incorrect parameter value is given.
+ *
+ * @since 2.7.0
+ *
+ * @param array|WP_Error $response HTTP response.
+ * @return int|string The response code as an integer. Empty string if incorrect parameter given.
+ */
+function wp_remote_retrieve_response_code( $response ) {
+ if ( is_wp_error( $response ) || ! isset( $response['response'] ) || ! is_array( $response['response'] ) ) {
+ return '';
+ }
+
+ return $response['response']['code'];
+}
+
+/**
+ * Retrieve only the response message from the raw response.
+ *
+ * Will return an empty string if incorrect parameter value is given.
+ *
+ * @since 2.7.0
+ *
+ * @param array|WP_Error $response HTTP response.
+ * @return string The response message. Empty string if incorrect parameter given.
+ */
+function wp_remote_retrieve_response_message( $response ) {
+ if ( is_wp_error( $response ) || ! isset( $response['response'] ) || ! is_array( $response['response'] ) ) {
+ return '';
+ }
+
+ return $response['response']['message'];
+}
+
+/**
+ * Retrieve only the body from the raw response.
+ *
+ * @since 2.7.0
+ *
+ * @param array|WP_Error $response HTTP response.
+ * @return string The body of the response. Empty string if no body or incorrect parameter given.
+ */
+function wp_remote_retrieve_body( $response ) {
+ if ( is_wp_error( $response ) || ! isset( $response['body'] ) ) {
+ return '';
+ }
+
+ return $response['body'];
+}
+
+/**
+ * Retrieve only the cookies from the raw response.
+ *
+ * @since 4.4.0
+ *
+ * @param array|WP_Error $response HTTP response.
+ * @return WP_Http_Cookie[] An array of `WP_Http_Cookie` objects from the response.
+ * Empty array if there are none, or the response is a WP_Error.
+ */
+function wp_remote_retrieve_cookies( $response ) {
+ if ( is_wp_error( $response ) || empty( $response['cookies'] ) ) {
+ return array();
+ }
+
+ return $response['cookies'];
+}
+
+/**
+ * Retrieve a single cookie by name from the raw response.
+ *
+ * @since 4.4.0
+ *
+ * @param array|WP_Error $response HTTP response.
+ * @param string $name The name of the cookie to retrieve.
+ * @return WP_Http_Cookie|string The `WP_Http_Cookie` object, or empty string
+ * if the cookie is not present in the response.
+ */
+function wp_remote_retrieve_cookie( $response, $name ) {
+ $cookies = wp_remote_retrieve_cookies( $response );
+
+ if ( empty( $cookies ) ) {
+ return '';
+ }
+
+ foreach ( $cookies as $cookie ) {
+ if ( $cookie->name === $name ) {
+ return $cookie;
+ }
+ }
+
+ return '';
+}
+
+/**
+ * Retrieve a single cookie's value by name from the raw response.
+ *
+ * @since 4.4.0
+ *
+ * @param array|WP_Error $response HTTP response.
+ * @param string $name The name of the cookie to retrieve.
+ * @return string The value of the cookie, or empty string
+ * if the cookie is not present in the response.
+ */
+function wp_remote_retrieve_cookie_value( $response, $name ) {
+ $cookie = wp_remote_retrieve_cookie( $response, $name );
+
+ if ( ! ( $cookie instanceof WP_Http_Cookie ) ) {
+ return '';
+ }
+
+ return $cookie->value;
+}
+
+/**
+ * Determines if there is an HTTP Transport that can process this request.
+ *
+ * @since 3.2.0
+ *
+ * @param array $capabilities Array of capabilities to test or a wp_remote_request() $args array.
+ * @param string $url Optional. If given, will check if the URL requires SSL and adds
+ * that requirement to the capabilities array.
+ *
+ * @return bool
+ */
+function wp_http_supports( $capabilities = array(), $url = null ) {
+ $http = _wp_http_get_object();
+
+ $capabilities = wp_parse_args( $capabilities );
+
+ $count = count( $capabilities );
+
+ // If we have a numeric $capabilities array, spoof a wp_remote_request() associative $args array.
+ if ( $count && count( array_filter( array_keys( $capabilities ), 'is_numeric' ) ) === $count ) {
+ $capabilities = array_combine( array_values( $capabilities ), array_fill( 0, $count, true ) );
+ }
+
+ if ( $url && ! isset( $capabilities['ssl'] ) ) {
+ $scheme = parse_url( $url, PHP_URL_SCHEME );
+ if ( 'https' === $scheme || 'ssl' === $scheme ) {
+ $capabilities['ssl'] = true;
+ }
+ }
+
+ return (bool) $http->_get_first_available_transport( $capabilities );
+}
+
+/**
+ * Get the HTTP Origin of the current request.
+ *
+ * @since 3.4.0
+ *
+ * @return string URL of the origin. Empty string if no origin.
+ */
+function get_http_origin() {
+ $origin = '';
+ if ( ! empty( $_SERVER['HTTP_ORIGIN'] ) ) {
+ $origin = $_SERVER['HTTP_ORIGIN'];
+ }
+
+ /**
+ * Change the origin of an HTTP request.
+ *
+ * @since 3.4.0
+ *
+ * @param string $origin The original origin for the request.
+ */
+ return apply_filters( 'http_origin', $origin );
+}
+
+/**
+ * Retrieve list of allowed HTTP origins.
+ *
+ * @since 3.4.0
+ *
+ * @return string[] Array of origin URLs.
+ */
+function get_allowed_http_origins() {
+ $admin_origin = parse_url( admin_url() );
+ $home_origin = parse_url( home_url() );
+
+ // @todo Preserve port?
+ $allowed_origins = array_unique(
+ array(
+ 'http://' . $admin_origin['host'],
+ 'https://' . $admin_origin['host'],
+ 'http://' . $home_origin['host'],
+ 'https://' . $home_origin['host'],
+ )
+ );
+
+ /**
+ * Change the origin types allowed for HTTP requests.
+ *
+ * @since 3.4.0
+ *
+ * @param string[] $allowed_origins {
+ * Array of default allowed HTTP origins.
+ *
+ * @type string $0 Non-secure URL for admin origin.
+ * @type string $1 Secure URL for admin origin.
+ * @type string $2 Non-secure URL for home origin.
+ * @type string $3 Secure URL for home origin.
+ * }
+ */
+ return apply_filters( 'allowed_http_origins', $allowed_origins );
+}
+
+/**
+ * Determines if the HTTP origin is an authorized one.
+ *
+ * @since 3.4.0
+ *
+ * @param string|null $origin Origin URL. If not provided, the value of get_http_origin() is used.
+ * @return string Origin URL if allowed, empty string if not.
+ */
+function is_allowed_http_origin( $origin = null ) {
+ $origin_arg = $origin;
+
+ if ( null === $origin ) {
+ $origin = get_http_origin();
+ }
+
+ if ( $origin && ! in_array( $origin, get_allowed_http_origins(), true ) ) {
+ $origin = '';
+ }
+
+ /**
+ * Change the allowed HTTP origin result.
+ *
+ * @since 3.4.0
+ *
+ * @param string $origin Origin URL if allowed, empty string if not.
+ * @param string $origin_arg Original origin string passed into is_allowed_http_origin function.
+ */
+ return apply_filters( 'allowed_http_origin', $origin, $origin_arg );
+}
+
+/**
+ * Send Access-Control-Allow-Origin and related headers if the current request
+ * is from an allowed origin.
+ *
+ * If the request is an OPTIONS request, the script exits with either access
+ * control headers sent, or a 403 response if the origin is not allowed. For
+ * other request methods, you will receive a return value.
+ *
+ * @since 3.4.0
+ *
+ * @return string|false Returns the origin URL if headers are sent. Returns false
+ * if headers are not sent.
+ */
+function send_origin_headers() {
+ $origin = get_http_origin();
+
+ if ( is_allowed_http_origin( $origin ) ) {
+ header( 'Access-Control-Allow-Origin: ' . $origin );
+ header( 'Access-Control-Allow-Credentials: true' );
+ if ( 'OPTIONS' === $_SERVER['REQUEST_METHOD'] ) {
+ exit;
+ }
+ return $origin;
+ }
+
+ if ( 'OPTIONS' === $_SERVER['REQUEST_METHOD'] ) {
+ status_header( 403 );
+ exit;
+ }
+
+ return false;
+}
+
+/**
+ * Validate a URL for safe use in the HTTP API.
+ *
+ * @since 3.5.2
+ *
+ * @param string $url Request URL.
+ * @return string|false URL or false on failure.
+ */
+function wp_http_validate_url( $url ) {
+ if ( ! is_string( $url ) || '' === $url || is_numeric( $url ) ) {
+ return false;
+ }
+
+ $original_url = $url;
+ $url = wp_kses_bad_protocol( $url, array( 'http', 'https' ) );
+ if ( ! $url || strtolower( $url ) !== strtolower( $original_url ) ) {
+ return false;
+ }
+
+ $parsed_url = parse_url( $url );
+ if ( ! $parsed_url || empty( $parsed_url['host'] ) ) {
+ return false;
+ }
+
+ if ( isset( $parsed_url['user'] ) || isset( $parsed_url['pass'] ) ) {
+ return false;
+ }
+
+ if ( false !== strpbrk( $parsed_url['host'], ':#?[]' ) ) {
+ return false;
+ }
+
+ $parsed_home = parse_url( get_option( 'home' ) );
+ $same_host = isset( $parsed_home['host'] ) && strtolower( $parsed_home['host'] ) === strtolower( $parsed_url['host'] );
+ $host = trim( $parsed_url['host'], '.' );
+
+ if ( ! $same_host ) {
+ if ( preg_match( '#^(([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)\.){3}([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)$#', $host ) ) {
+ $ip = $host;
+ } else {
+ $ip = gethostbyname( $host );
+ if ( $ip === $host ) { // Error condition for gethostbyname().
+ return false;
+ }
+ }
+ if ( $ip ) {
+ $parts = array_map( 'intval', explode( '.', $ip ) );
+ if ( 127 === $parts[0] || 10 === $parts[0] || 0 === $parts[0]
+ || ( 172 === $parts[0] && 16 <= $parts[1] && 31 >= $parts[1] )
+ || ( 192 === $parts[0] && 168 === $parts[1] )
+ ) {
+ // If host appears local, reject unless specifically allowed.
+ /**
+ * Check if HTTP request is external or not.
+ *
+ * Allows to change and allow external requests for the HTTP request.
+ *
+ * @since 3.6.0
+ *
+ * @param bool $external Whether HTTP request is external or not.
+ * @param string $host Host name of the requested URL.
+ * @param string $url Requested URL.
+ */
+ if ( ! apply_filters( 'http_request_host_is_external', false, $host, $url ) ) {
+ return false;
+ }
+ }
+ }
+ }
+
+ if ( empty( $parsed_url['port'] ) ) {
+ return $url;
+ }
+
+ $port = $parsed_url['port'];
+
+ /**
+ * Controls the list of ports considered safe in HTTP API.
+ *
+ * Allows to change and allow external requests for the HTTP request.
+ *
+ * @since 5.9.0
+ *
+ * @param int[] $allowed_ports Array of integers for valid ports.
+ * @param string $host Host name of the requested URL.
+ * @param string $url Requested URL.
+ */
+ $allowed_ports = apply_filters( 'http_allowed_safe_ports', array( 80, 443, 8080 ), $host, $url );
+ if ( is_array( $allowed_ports ) && in_array( $port, $allowed_ports, true ) ) {
+ return $url;
+ }
+
+ if ( $parsed_home && $same_host && isset( $parsed_home['port'] ) && $parsed_home['port'] === $port ) {
+ return $url;
+ }
+
+ return false;
+}
+
+/**
+ * Mark allowed redirect hosts safe for HTTP requests as well.
+ *
+ * Attached to the {@see 'http_request_host_is_external'} filter.
+ *
+ * @since 3.6.0
+ *
+ * @param bool $is_external
+ * @param string $host
+ * @return bool
+ */
+function allowed_http_request_hosts( $is_external, $host ) {
+ if ( ! $is_external && wp_validate_redirect( 'http://' . $host ) ) {
+ $is_external = true;
+ }
+ return $is_external;
+}
+
+/**
+ * Adds any domain in a multisite installation for safe HTTP requests to the
+ * allowed list.
+ *
+ * Attached to the {@see 'http_request_host_is_external'} filter.
+ *
+ * @since 3.6.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param bool $is_external
+ * @param string $host
+ * @return bool
+ */
+function ms_allowed_http_request_hosts( $is_external, $host ) {
+ global $wpdb;
+ static $queried = array();
+ if ( $is_external ) {
+ return $is_external;
+ }
+ if ( get_network()->domain === $host ) {
+ return true;
+ }
+ if ( isset( $queried[ $host ] ) ) {
+ return $queried[ $host ];
+ }
+ $queried[ $host ] = (bool) $wpdb->get_var( $wpdb->prepare( "SELECT domain FROM $wpdb->blogs WHERE domain = %s LIMIT 1", $host ) );
+ return $queried[ $host ];
+}
+
+/**
+ * A wrapper for PHP's parse_url() function that handles consistency in the return values
+ * across PHP versions.
+ *
+ * PHP 5.4.7 expanded parse_url()'s ability to handle non-absolute URLs, including
+ * schemeless and relative URLs with "://" in the path. This function works around
+ * those limitations providing a standard output on PHP 5.2~5.4+.
+ *
+ * Secondly, across various PHP versions, schemeless URLs containing a ":" in the query
+ * are being handled inconsistently. This function works around those differences as well.
+ *
+ * @since 4.4.0
+ * @since 4.7.0 The `$component` parameter was added for parity with PHP's `parse_url()`.
+ *
+ * @link https://www.php.net/manual/en/function.parse-url.php
+ *
+ * @param string $url The URL to parse.
+ * @param int $component The specific component to retrieve. Use one of the PHP
+ * predefined constants to specify which one.
+ * Defaults to -1 (= return all parts as an array).
+ * @return mixed False on parse failure; Array of URL components on success;
+ * When a specific component has been requested: null if the component
+ * doesn't exist in the given URL; a string or - in the case of
+ * PHP_URL_PORT - integer when it does. See parse_url()'s return values.
+ */
+function wp_parse_url( $url, $component = -1 ) {
+ $to_unset = array();
+ $url = (string) $url;
+
+ if ( str_starts_with( $url, '//' ) ) {
+ $to_unset[] = 'scheme';
+ $url = 'placeholder:' . $url;
+ } elseif ( str_starts_with( $url, '/' ) ) {
+ $to_unset[] = 'scheme';
+ $to_unset[] = 'host';
+ $url = 'placeholder://placeholder' . $url;
+ }
+
+ $parts = parse_url( $url );
+
+ if ( false === $parts ) {
+ // Parsing failure.
+ return $parts;
+ }
+
+ // Remove the placeholder values.
+ foreach ( $to_unset as $key ) {
+ unset( $parts[ $key ] );
+ }
+
+ return _get_component_from_parsed_url_array( $parts, $component );
+}
+
+/**
+ * Retrieve a specific component from a parsed URL array.
+ *
+ * @internal
+ *
+ * @since 4.7.0
+ * @access private
+ *
+ * @link https://www.php.net/manual/en/function.parse-url.php
+ *
+ * @param array|false $url_parts The parsed URL. Can be false if the URL failed to parse.
+ * @param int $component The specific component to retrieve. Use one of the PHP
+ * predefined constants to specify which one.
+ * Defaults to -1 (= return all parts as an array).
+ * @return mixed False on parse failure; Array of URL components on success;
+ * When a specific component has been requested: null if the component
+ * doesn't exist in the given URL; a string or - in the case of
+ * PHP_URL_PORT - integer when it does. See parse_url()'s return values.
+ */
+function _get_component_from_parsed_url_array( $url_parts, $component = -1 ) {
+ if ( -1 === $component ) {
+ return $url_parts;
+ }
+
+ $key = _wp_translate_php_url_constant_to_key( $component );
+ if ( false !== $key && is_array( $url_parts ) && isset( $url_parts[ $key ] ) ) {
+ return $url_parts[ $key ];
+ } else {
+ return null;
+ }
+}
+
+/**
+ * Translate a PHP_URL_* constant to the named array keys PHP uses.
+ *
+ * @internal
+ *
+ * @since 4.7.0
+ * @access private
+ *
+ * @link https://www.php.net/manual/en/url.constants.php
+ *
+ * @param int $constant PHP_URL_* constant.
+ * @return string|false The named key or false.
+ */
+function _wp_translate_php_url_constant_to_key( $constant ) {
+ $translation = array(
+ PHP_URL_SCHEME => 'scheme',
+ PHP_URL_HOST => 'host',
+ PHP_URL_PORT => 'port',
+ PHP_URL_USER => 'user',
+ PHP_URL_PASS => 'pass',
+ PHP_URL_PATH => 'path',
+ PHP_URL_QUERY => 'query',
+ PHP_URL_FRAGMENT => 'fragment',
+ );
+
+ if ( isset( $translation[ $constant ] ) ) {
+ return $translation[ $constant ];
+ } else {
+ return false;
+ }
+}