Adding upstream version 6.4.3+dfsg1.upstream/6.4.3+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1971 insertions, 0 deletions

diff --git a/wp-includes/load.php b/wp-includes/load.php
new file mode 100644
index 0000000..520902c
--- /dev/null
+++ b/wp-includes/load.php
@@ -0,0 +1,1971 @@
+<?php
+/**
+ * These functions are needed to load WordPress.
+ *
+ * @package WordPress
+ */
+
+/**
+ * Returns the HTTP protocol sent by the server.
+ *
+ * @since 4.4.0
+ *
+ * @return string The HTTP protocol. Default: HTTP/1.0.
+ */
+function wp_get_server_protocol() {
+	$protocol = isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : '';
+
+	if ( ! in_array( $protocol, array( 'HTTP/1.1', 'HTTP/2', 'HTTP/2.0', 'HTTP/3' ), true ) ) {
+		$protocol = 'HTTP/1.0';
+	}
+
+	return $protocol;
+}
+
+/**
+ * Fixes `$_SERVER` variables for various setups.
+ *
+ * @since 3.0.0
+ * @access private
+ *
+ * @global string $PHP_SELF The filename of the currently executing script,
+ *                          relative to the document root.
+ */
+function wp_fix_server_vars() {
+	global $PHP_SELF;
+
+	$default_server_values = array(
+		'SERVER_SOFTWARE' => '',
+		'REQUEST_URI'     => '',
+	);
+
+	$_SERVER = array_merge( $default_server_values, $_SERVER );
+
+	// Fix for IIS when running with PHP ISAPI.
+	if ( empty( $_SERVER['REQUEST_URI'] )
+		|| ( 'cgi-fcgi' !== PHP_SAPI && preg_match( '/^Microsoft-IIS\//', $_SERVER['SERVER_SOFTWARE'] ) )
+	) {
+
+		if ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) {
+			// IIS Mod-Rewrite.
+			$_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_ORIGINAL_URL'];
+		} elseif ( isset( $_SERVER['HTTP_X_REWRITE_URL'] ) ) {
+			// IIS Isapi_Rewrite.
+			$_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_REWRITE_URL'];
+		} else {
+			// Use ORIG_PATH_INFO if there is no PATH_INFO.
+			if ( ! isset( $_SERVER['PATH_INFO'] ) && isset( $_SERVER['ORIG_PATH_INFO'] ) ) {
+				$_SERVER['PATH_INFO'] = $_SERVER['ORIG_PATH_INFO'];
+			}
+
+			// Some IIS + PHP configurations put the script-name in the path-info (no need to append it twice).
+			if ( isset( $_SERVER['PATH_INFO'] ) ) {
+				if ( $_SERVER['PATH_INFO'] === $_SERVER['SCRIPT_NAME'] ) {
+					$_SERVER['REQUEST_URI'] = $_SERVER['PATH_INFO'];
+				} else {
+					$_SERVER['REQUEST_URI'] = $_SERVER['SCRIPT_NAME'] . $_SERVER['PATH_INFO'];
+				}
+			}
+
+			// Append the query string if it exists and isn't null.
+			if ( ! empty( $_SERVER['QUERY_STRING'] ) ) {
+				$_SERVER['REQUEST_URI'] .= '?' . $_SERVER['QUERY_STRING'];
+			}
+		}
+	}
+
+	// Fix for PHP as CGI hosts that set SCRIPT_FILENAME to something ending in php.cgi for all requests.
+	if ( isset( $_SERVER['SCRIPT_FILENAME'] ) && str_ends_with( $_SERVER['SCRIPT_FILENAME'], 'php.cgi' ) ) {
+		$_SERVER['SCRIPT_FILENAME'] = $_SERVER['PATH_TRANSLATED'];
+	}
+
+	// Fix for Dreamhost and other PHP as CGI hosts.
+	if ( isset( $_SERVER['SCRIPT_NAME'] ) && str_contains( $_SERVER['SCRIPT_NAME'], 'php.cgi' ) ) {
+		unset( $_SERVER['PATH_INFO'] );
+	}
+
+	// Fix empty PHP_SELF.
+	$PHP_SELF = $_SERVER['PHP_SELF'];
+	if ( empty( $PHP_SELF ) ) {
+		$_SERVER['PHP_SELF'] = preg_replace( '/(\?.*)?$/', '', $_SERVER['REQUEST_URI'] );
+		$PHP_SELF            = $_SERVER['PHP_SELF'];
+	}
+
+	wp_populate_basic_auth_from_authorization_header();
+}
+
+/**
+ * Populates the Basic Auth server details from the Authorization header.
+ *
+ * Some servers running in CGI or FastCGI mode don't pass the Authorization
+ * header on to WordPress.  If it's been rewritten to the `HTTP_AUTHORIZATION` header,
+ * fill in the proper $_SERVER variables instead.
+ *
+ * @since 5.6.0
+ */
+function wp_populate_basic_auth_from_authorization_header() {
+	// If we don't have anything to pull from, return early.
+	if ( ! isset( $_SERVER['HTTP_AUTHORIZATION'] ) && ! isset( $_SERVER['REDIRECT_HTTP_AUTHORIZATION'] ) ) {
+		return;
+	}
+
+	// If either PHP_AUTH key is already set, do nothing.
+	if ( isset( $_SERVER['PHP_AUTH_USER'] ) || isset( $_SERVER['PHP_AUTH_PW'] ) ) {
+		return;
+	}
+
+	// From our prior conditional, one of these must be set.
+	$header = isset( $_SERVER['HTTP_AUTHORIZATION'] ) ? $_SERVER['HTTP_AUTHORIZATION'] : $_SERVER['REDIRECT_HTTP_AUTHORIZATION'];
+
+	// Test to make sure the pattern matches expected.
+	if ( ! preg_match( '%^Basic [a-z\d/+]*={0,2}$%i', $header ) ) {
+		return;
+	}
+
+	// Removing `Basic ` the token would start six characters in.
+	$token    = substr( $header, 6 );
+	$userpass = base64_decode( $token );
+
+	// There must be at least one colon in the string.
+	if ( ! str_contains( $userpass, ':' ) ) {
+		return;
+	}
+
+	list( $user, $pass ) = explode( ':', $userpass, 2 );
+
+	// Now shove them in the proper keys where we're expecting later on.
+	$_SERVER['PHP_AUTH_USER'] = $user;
+	$_SERVER['PHP_AUTH_PW']   = $pass;
+}
+
+/**
+ * Checks for the required PHP version, and the mysqli extension or
+ * a database drop-in.
+ *
+ * Dies if requirements are not met.
+ *
+ * @since 3.0.0
+ * @access private
+ *
+ * @global string $required_php_version The required PHP version string.
+ * @global string $wp_version           The WordPress version string.
+ */
+function wp_check_php_mysql_versions() {
+	global $required_php_version, $wp_version;
+
+	$php_version = PHP_VERSION;
+
+	if ( version_compare( $required_php_version, $php_version, '>' ) ) {
+		$protocol = wp_get_server_protocol();
+		header( sprintf( '%s 500 Internal Server Error', $protocol ), true, 500 );
+		header( 'Content-Type: text/html; charset=utf-8' );
+		printf(
+			'Your server is running PHP version %1$s but WordPress %2$s requires at least %3$s.',
+			$php_version,
+			$wp_version,
+			$required_php_version
+		);
+		exit( 1 );
+	}
+
+	// This runs before default constants are defined, so we can't assume WP_CONTENT_DIR is set yet.
+	$wp_content_dir = defined( 'WP_CONTENT_DIR' ) ? WP_CONTENT_DIR : ABSPATH . 'wp-content';
+
+	if ( ! function_exists( 'mysqli_connect' )
+		&& ! file_exists( $wp_content_dir . '/db.php' )
+	) {
+		require_once ABSPATH . WPINC . '/functions.php';
+		wp_load_translations_early();
+
+		$message = '<p>' . __( 'Your PHP installation appears to be missing the MySQL extension which is required by WordPress.' ) . "</p>\n";
+
+		$message .= '<p>' . sprintf(
+			/* translators: %s: mysqli. */
+			__( 'Please check that the %s PHP extension is installed and enabled.' ),
+			'<code>mysqli</code>'
+		) . "</p>\n";
+
+		$message .= '<p>' . sprintf(
+			/* translators: %s: Support forums URL. */
+			__( 'If you are unsure what these terms mean you should probably contact your host. If you still need help you can always visit the <a href="%s">WordPress support forums</a>.' ),
+			__( 'https://wordpress.org/support/forums/' )
+		) . "</p>\n";
+
+		$args = array(
+			'exit' => false,
+			'code' => 'mysql_not_found',
+		);
+		wp_die(
+			$message,
+			__( 'Requirements Not Met' ),
+			$args
+		);
+		exit( 1 );
+	}
+}
+
+/**
+ * Retrieves the current environment type.
+ *
+ * The type can be set via the `WP_ENVIRONMENT_TYPE` global system variable,
+ * or a constant of the same name.
+ *
+ * Possible values are 'local', 'development', 'staging', and 'production'.
+ * If not set, the type defaults to 'production'.
+ *
+ * @since 5.5.0
+ * @since 5.5.1 Added the 'local' type.
+ * @since 5.5.1 Removed the ability to alter the list of types.
+ *
+ * @return string The current environment type.
+ */
+function wp_get_environment_type() {
+	static $current_env = '';
+
+	if ( ! defined( 'WP_RUN_CORE_TESTS' ) && $current_env ) {
+		return $current_env;
+	}
+
+	$wp_environments = array(
+		'local',
+		'development',
+		'staging',
+		'production',
+	);
+
+	// Add a note about the deprecated WP_ENVIRONMENT_TYPES constant.
+	if ( defined( 'WP_ENVIRONMENT_TYPES' ) && function_exists( '_deprecated_argument' ) ) {
+		if ( function_exists( '__' ) ) {
+			/* translators: %s: WP_ENVIRONMENT_TYPES */
+			$message = sprintf( __( 'The %s constant is no longer supported.' ), 'WP_ENVIRONMENT_TYPES' );
+		} else {
+			$message = sprintf( 'The %s constant is no longer supported.', 'WP_ENVIRONMENT_TYPES' );
+		}
+
+		_deprecated_argument(
+			'define()',
+			'5.5.1',
+			$message
+		);
+	}
+
+	// Check if the environment variable has been set, if `getenv` is available on the system.
+	if ( function_exists( 'getenv' ) ) {
+		$has_env = getenv( 'WP_ENVIRONMENT_TYPE' );
+		if ( false !== $has_env ) {
+			$current_env = $has_env;
+		}
+	}
+
+	// Fetch the environment from a constant, this overrides the global system variable.
+	if ( defined( 'WP_ENVIRONMENT_TYPE' ) && WP_ENVIRONMENT_TYPE ) {
+		$current_env = WP_ENVIRONMENT_TYPE;
+	}
+
+	// Make sure the environment is an allowed one, and not accidentally set to an invalid value.
+	if ( ! in_array( $current_env, $wp_environments, true ) ) {
+		$current_env = 'production';
+	}
+
+	return $current_env;
+}
+
+/**
+ * Retrieves the current development mode.
+ *
+ * The development mode affects how certain parts of the WordPress application behave,
+ * which is relevant when developing for WordPress.
+ *
+ * Development mode can be set via the `WP_DEVELOPMENT_MODE` constant in `wp-config.php`.
+ * Possible values are 'core', 'plugin', 'theme', 'all', or an empty string to disable
+ * development mode. 'all' is a special value to signify that all three development modes
+ * ('core', 'plugin', and 'theme') are enabled.
+ *
+ * Development mode is considered separately from `WP_DEBUG` and wp_get_environment_type().
+ * It does not affect debugging output, but rather functional nuances in WordPress.
+ *
+ * This function retrieves the currently set development mode value. To check whether
+ * a specific development mode is enabled, use wp_is_development_mode().
+ *
+ * @since 6.3.0
+ *
+ * @return string The current development mode.
+ */
+function wp_get_development_mode() {
+	static $current_mode = null;
+
+	if ( ! defined( 'WP_RUN_CORE_TESTS' ) && null !== $current_mode ) {
+		return $current_mode;
+	}
+
+	$development_mode = WP_DEVELOPMENT_MODE;
+
+	// Exclusively for core tests, rely on the `$_wp_tests_development_mode` global.
+	if ( defined( 'WP_RUN_CORE_TESTS' ) && isset( $GLOBALS['_wp_tests_development_mode'] ) ) {
+		$development_mode = $GLOBALS['_wp_tests_development_mode'];
+	}
+
+	$valid_modes = array(
+		'core',
+		'plugin',
+		'theme',
+		'all',
+		'',
+	);
+
+	if ( ! in_array( $development_mode, $valid_modes, true ) ) {
+		$development_mode = '';
+	}
+
+	$current_mode = $development_mode;
+
+	return $current_mode;
+}
+
+/**
+ * Checks whether the site is in the given development mode.
+ *
+ * @since 6.3.0
+ *
+ * @param string $mode Development mode to check for. Either 'core', 'plugin', 'theme', or 'all'.
+ * @return bool True if the given mode is covered by the current development mode, false otherwise.
+ */
+function wp_is_development_mode( $mode ) {
+	$current_mode = wp_get_development_mode();
+	if ( empty( $current_mode ) ) {
+		return false;
+	}
+
+	// Return true if the current mode encompasses all modes.
+	if ( 'all' === $current_mode ) {
+		return true;
+	}
+
+	// Return true if the current mode is the given mode.
+	return $mode === $current_mode;
+}
+
+/**
+ * Ensures all of WordPress is not loaded when handling a favicon.ico request.
+ *
+ * Instead, send the headers for a zero-length favicon and bail.
+ *
+ * @since 3.0.0
+ * @deprecated 5.4.0 Deprecated in favor of do_favicon().
+ */
+function wp_favicon_request() {
+	if ( '/favicon.ico' === $_SERVER['REQUEST_URI'] ) {
+		header( 'Content-Type: image/vnd.microsoft.icon' );
+		exit;
+	}
+}
+
+/**
+ * Dies with a maintenance message when conditions are met.
+ *
+ * The default message can be replaced by using a drop-in (maintenance.php in
+ * the wp-content directory).
+ *
+ * @since 3.0.0
+ * @access private
+ */
+function wp_maintenance() {
+	// Return if maintenance mode is disabled.
+	if ( ! wp_is_maintenance_mode() ) {
+		return;
+	}
+
+	if ( file_exists( WP_CONTENT_DIR . '/maintenance.php' ) ) {
+		require_once WP_CONTENT_DIR . '/maintenance.php';
+		die();
+	}
+
+	require_once ABSPATH . WPINC . '/functions.php';
+	wp_load_translations_early();
+
+	header( 'Retry-After: 600' );
+
+	wp_die(
+		__( 'Briefly unavailable for scheduled maintenance. Check back in a minute.' ),
+		__( 'Maintenance' ),
+		503
+	);
+}
+
+/**
+ * Checks if maintenance mode is enabled.
+ *
+ * Checks for a file in the WordPress root directory named ".maintenance".
+ * This file will contain the variable $upgrading, set to the time the file
+ * was created. If the file was created less than 10 minutes ago, WordPress
+ * is in maintenance mode.
+ *
+ * @since 5.5.0
+ *
+ * @global int $upgrading The Unix timestamp marking when upgrading WordPress began.
+ *
+ * @return bool True if maintenance mode is enabled, false otherwise.
+ */
+function wp_is_maintenance_mode() {
+	global $upgrading;
+
+	if ( ! file_exists( ABSPATH . '.maintenance' ) || wp_installing() ) {
+		return false;
+	}
+
+	require ABSPATH . '.maintenance';
+
+	// If the $upgrading timestamp is older than 10 minutes, consider maintenance over.
+	if ( ( time() - $upgrading ) >= 10 * MINUTE_IN_SECONDS ) {
+		return false;
+	}
+
+	/**
+	 * Filters whether to enable maintenance mode.
+	 *
+	 * This filter runs before it can be used by plugins. It is designed for
+	 * non-web runtimes. If this filter returns true, maintenance mode will be
+	 * active and the request will end. If false, the request will be allowed to
+	 * continue processing even if maintenance mode should be active.
+	 *
+	 * @since 4.6.0
+	 *
+	 * @param bool $enable_checks Whether to enable maintenance mode. Default true.
+	 * @param int  $upgrading     The timestamp set in the .maintenance file.
+	 */
+	if ( ! apply_filters( 'enable_maintenance_mode', true, $upgrading ) ) {
+		return false;
+	}
+
+	return true;
+}
+
+/**
+ * Gets the time elapsed so far during this PHP script.
+ *
+ * Uses REQUEST_TIME_FLOAT that appeared in PHP 5.4.0.
+ *
+ * @since 5.8.0
+ *
+ * @return float Seconds since the PHP script started.
+ */
+function timer_float() {
+	return microtime( true ) - $_SERVER['REQUEST_TIME_FLOAT'];
+}
+
+/**
+ * Starts the WordPress micro-timer.
+ *
+ * @since 0.71
+ * @access private
+ *
+ * @global float $timestart Unix timestamp set at the beginning of the page load.
+ * @see timer_stop()
+ *
+ * @return bool Always returns true.
+ */
+function timer_start() {
+	global $timestart;
+
+	$timestart = microtime( true );
+
+	return true;
+}
+
+/**
+ * Retrieves or displays the time from the page start to when function is called.
+ *
+ * @since 0.71
+ *
+ * @global float   $timestart Seconds from when timer_start() is called.
+ * @global float   $timeend   Seconds from when function is called.
+ *
+ * @param int|bool $display   Whether to echo or return the results. Accepts 0|false for return,
+ *                            1|true for echo. Default 0|false.
+ * @param int      $precision The number of digits from the right of the decimal to display.
+ *                            Default 3.
+ * @return string The "second.microsecond" finished time calculation. The number is formatted
+ *                for human consumption, both localized and rounded.
+ */
+function timer_stop( $display = 0, $precision = 3 ) {
+	global $timestart, $timeend;
+
+	$timeend   = microtime( true );
+	$timetotal = $timeend - $timestart;
+
+	if ( function_exists( 'number_format_i18n' ) ) {
+		$r = number_format_i18n( $timetotal, $precision );
+	} else {
+		$r = number_format( $timetotal, $precision );
+	}
+
+	if ( $display ) {
+		echo $r;
+	}
+
+	return $r;
+}
+
+/**
+ * Sets PHP error reporting based on WordPress debug settings.
+ *
+ * Uses three constants: `WP_DEBUG`, `WP_DEBUG_DISPLAY`, and `WP_DEBUG_LOG`.
+ * All three can be defined in wp-config.php. By default, `WP_DEBUG` and
+ * `WP_DEBUG_LOG` are set to false, and `WP_DEBUG_DISPLAY` is set to true.
+ *
+ * When `WP_DEBUG` is true, all PHP notices are reported. WordPress will also
+ * display internal notices: when a deprecated WordPress function, function
+ * argument, or file is used. Deprecated code may be removed from a later
+ * version.
+ *
+ * It is strongly recommended that plugin and theme developers use `WP_DEBUG`
+ * in their development environments.
+ *
+ * `WP_DEBUG_DISPLAY` and `WP_DEBUG_LOG` perform no function unless `WP_DEBUG`
+ * is true.
+ *
+ * When `WP_DEBUG_DISPLAY` is true, WordPress will force errors to be displayed.
+ * `WP_DEBUG_DISPLAY` defaults to true. Defining it as null prevents WordPress
+ * from changing the global configuration setting. Defining `WP_DEBUG_DISPLAY`
+ * as false will force errors to be hidden.
+ *
+ * When `WP_DEBUG_LOG` is true, errors will be logged to `wp-content/debug.log`.
+ * When `WP_DEBUG_LOG` is a valid path, errors will be logged to the specified file.
+ *
+ * Errors are never displayed for XML-RPC, REST, `ms-files.php`, and Ajax requests.
+ *
+ * @since 3.0.0
+ * @since 5.1.0 `WP_DEBUG_LOG` can be a file path.
+ * @access private
+ */
+function wp_debug_mode() {
+	/**
+	 * Filters whether to allow the debug mode check to occur.
+	 *
+	 * This filter runs before it can be used by plugins. It is designed for
+	 * non-web runtimes. Returning false causes the `WP_DEBUG` and related
+	 * constants to not be checked and the default PHP values for errors
+	 * will be used unless you take care to update them yourself.
+	 *
+	 * To use this filter you must define a `$wp_filter` global before
+	 * WordPress loads, usually in `wp-config.php`.
+	 *
+	 * Example:
+	 *
+	 *     $GLOBALS['wp_filter'] = array(
+	 *         'enable_wp_debug_mode_checks' => array(
+	 *             10 => array(
+	 *                 array(
+	 *                     'accepted_args' => 0,
+	 *                     'function'      => function() {
+	 *                         return false;
+	 *                     },
+	 *                 ),
+	 *             ),
+	 *         ),
+	 *     );
+	 *
+	 * @since 4.6.0
+	 *
+	 * @param bool $enable_debug_mode Whether to enable debug mode checks to occur. Default true.
+	 */
+	if ( ! apply_filters( 'enable_wp_debug_mode_checks', true ) ) {
+		return;
+	}
+
+	if ( WP_DEBUG ) {
+		error_reporting( E_ALL );
+
+		if ( WP_DEBUG_DISPLAY ) {
+			ini_set( 'display_errors', 1 );
+		} elseif ( null !== WP_DEBUG_DISPLAY ) {
+			ini_set( 'display_errors', 0 );
+		}
+
+		if ( in_array( strtolower( (string) WP_DEBUG_LOG ), array( 'true', '1' ), true ) ) {
+			$log_path = WP_CONTENT_DIR . '/debug.log';
+		} elseif ( is_string( WP_DEBUG_LOG ) ) {
+			$log_path = WP_DEBUG_LOG;
+		} else {
+			$log_path = false;
+		}
+
+		if ( $log_path ) {
+			ini_set( 'log_errors', 1 );
+			ini_set( 'error_log', $log_path );
+		}
+	} else {
+		error_reporting( E_CORE_ERROR | E_CORE_WARNING | E_COMPILE_ERROR | E_ERROR | E_WARNING | E_PARSE | E_USER_ERROR | E_USER_WARNING | E_RECOVERABLE_ERROR );
+	}
+
+	if ( defined( 'XMLRPC_REQUEST' ) || defined( 'REST_REQUEST' ) || defined( 'MS_FILES_REQUEST' )
+		|| ( defined( 'WP_INSTALLING' ) && WP_INSTALLING )
+		|| wp_doing_ajax() || wp_is_json_request()
+	) {
+		ini_set( 'display_errors', 0 );
+	}
+}
+
+/**
+ * Sets the location of the language directory.
+ *
+ * To set directory manually, define the `WP_LANG_DIR` constant
+ * in wp-config.php.
+ *
+ * If the language directory exists within `WP_CONTENT_DIR`, it
+ * is used. Otherwise the language directory is assumed to live
+ * in `WPINC`.
+ *
+ * @since 3.0.0
+ * @access private
+ */
+function wp_set_lang_dir() {
+	if ( ! defined( 'WP_LANG_DIR' ) ) {
+		if ( file_exists( WP_CONTENT_DIR . '/languages' ) && @is_dir( WP_CONTENT_DIR . '/languages' )
+			|| ! @is_dir( ABSPATH . WPINC . '/languages' )
+		) {
+			/**
+			 * Server path of the language directory.
+			 *
+			 * No leading slash, no trailing slash, full path, not relative to ABSPATH
+			 *
+			 * @since 2.1.0
+			 */
+			define( 'WP_LANG_DIR', WP_CONTENT_DIR . '/languages' );
+
+			if ( ! defined( 'LANGDIR' ) ) {
+				// Old static relative path maintained for limited backward compatibility - won't work in some cases.
+				define( 'LANGDIR', 'wp-content/languages' );
+			}
+		} else {
+			/**
+			 * Server path of the language directory.
+			 *
+			 * No leading slash, no trailing slash, full path, not relative to `ABSPATH`.
+			 *
+			 * @since 2.1.0
+			 */
+			define( 'WP_LANG_DIR', ABSPATH . WPINC . '/languages' );
+
+			if ( ! defined( 'LANGDIR' ) ) {
+				// Old relative path maintained for backward compatibility.
+				define( 'LANGDIR', WPINC . '/languages' );
+			}
+		}
+	}
+}
+
+/**
+ * Loads the database class file and instantiates the `$wpdb` global.
+ *
+ * @since 2.5.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ */
+function require_wp_db() {
+	global $wpdb;
+
+	require_once ABSPATH . WPINC . '/class-wpdb.php';
+
+	if ( file_exists( WP_CONTENT_DIR . '/db.php' ) ) {
+		require_once WP_CONTENT_DIR . '/db.php';
+	}
+
+	if ( isset( $wpdb ) ) {
+		return;
+	}
+
+	$dbuser     = defined( 'DB_USER' ) ? DB_USER : '';
+	$dbpassword = defined( 'DB_PASSWORD' ) ? DB_PASSWORD : '';
+	$dbname     = defined( 'DB_NAME' ) ? DB_NAME : '';
+	$dbhost     = defined( 'DB_HOST' ) ? DB_HOST : '';
+
+	$wpdb = new wpdb( $dbuser, $dbpassword, $dbname, $dbhost );
+}
+
+/**
+ * Sets the database table prefix and the format specifiers for database
+ * table columns.
+ *
+ * Columns not listed here default to `%s`.
+ *
+ * @since 3.0.0
+ * @access private
+ *
+ * @global wpdb   $wpdb         WordPress database abstraction object.
+ * @global string $table_prefix The database table prefix.
+ */
+function wp_set_wpdb_vars() {
+	global $wpdb, $table_prefix;
+
+	if ( ! empty( $wpdb->error ) ) {
+		dead_db();
+	}
+
+	$wpdb->field_types = array(
+		'post_author'      => '%d',
+		'post_parent'      => '%d',
+		'menu_order'       => '%d',
+		'term_id'          => '%d',
+		'term_group'       => '%d',
+		'term_taxonomy_id' => '%d',
+		'parent'           => '%d',
+		'count'            => '%d',
+		'object_id'        => '%d',
+		'term_order'       => '%d',
+		'ID'               => '%d',
+		'comment_ID'       => '%d',
+		'comment_post_ID'  => '%d',
+		'comment_parent'   => '%d',
+		'user_id'          => '%d',
+		'link_id'          => '%d',
+		'link_owner'       => '%d',
+		'link_rating'      => '%d',
+		'option_id'        => '%d',
+		'blog_id'          => '%d',
+		'meta_id'          => '%d',
+		'post_id'          => '%d',
+		'user_status'      => '%d',
+		'umeta_id'         => '%d',
+		'comment_karma'    => '%d',
+		'comment_count'    => '%d',
+		// Multisite:
+		'active'           => '%d',
+		'cat_id'           => '%d',
+		'deleted'          => '%d',
+		'lang_id'          => '%d',
+		'mature'           => '%d',
+		'public'           => '%d',
+		'site_id'          => '%d',
+		'spam'             => '%d',
+	);
+
+	$prefix = $wpdb->set_prefix( $table_prefix );
+
+	if ( is_wp_error( $prefix ) ) {
+		wp_load_translations_early();
+		wp_die(
+			sprintf(
+				/* translators: 1: $table_prefix, 2: wp-config.php */
+				__( '<strong>Error:</strong> %1$s in %2$s can only contain numbers, letters, and underscores.' ),
+				'<code>$table_prefix</code>',
+				'<code>wp-config.php</code>'
+			)
+		);
+	}
+}
+
+/**
+ * Toggles `$_wp_using_ext_object_cache` on and off without directly
+ * touching global.
+ *
+ * @since 3.7.0
+ *
+ * @global bool $_wp_using_ext_object_cache
+ *
+ * @param bool $using Whether external object cache is being used.
+ * @return bool The current 'using' setting.
+ */
+function wp_using_ext_object_cache( $using = null ) {
+	global $_wp_using_ext_object_cache;
+
+	$current_using = $_wp_using_ext_object_cache;
+
+	if ( null !== $using ) {
+		$_wp_using_ext_object_cache = $using;
+	}
+
+	return $current_using;
+}
+
+/**
+ * Starts the WordPress object cache.
+ *
+ * If an object-cache.php file exists in the wp-content directory,
+ * it uses that drop-in as an external object cache.
+ *
+ * @since 3.0.0
+ * @access private
+ *
+ * @global array $wp_filter Stores all of the filters.
+ */
+function wp_start_object_cache() {
+	global $wp_filter;
+	static $first_init = true;
+
+	// Only perform the following checks once.
+
+	/**
+	 * Filters whether to enable loading of the object-cache.php drop-in.
+	 *
+	 * This filter runs before it can be used by plugins. It is designed for non-web
+	 * runtimes. If false is returned, object-cache.php will never be loaded.
+	 *
+	 * @since 5.8.0
+	 *
+	 * @param bool $enable_object_cache Whether to enable loading object-cache.php (if present).
+	 *                                  Default true.
+	 */
+	if ( $first_init && apply_filters( 'enable_loading_object_cache_dropin', true ) ) {
+		if ( ! function_exists( 'wp_cache_init' ) ) {
+			/*
+			 * This is the normal situation. First-run of this function. No
+			 * caching backend has been loaded.
+			 *
+			 * We try to load a custom caching backend, and then, if it
+			 * results in a wp_cache_init() function existing, we note
+			 * that an external object cache is being used.
+			 */
+			if ( file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) {
+				require_once WP_CONTENT_DIR . '/object-cache.php';
+
+				if ( function_exists( 'wp_cache_init' ) ) {
+					wp_using_ext_object_cache( true );
+				}
+
+				// Re-initialize any hooks added manually by object-cache.php.
+				if ( $wp_filter ) {
+					$wp_filter = WP_Hook::build_preinitialized_hooks( $wp_filter );
+				}
+			}
+		} elseif ( ! wp_using_ext_object_cache() && file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) {
+			/*
+			 * Sometimes advanced-cache.php can load object-cache.php before
+			 * this function is run. This breaks the function_exists() check
+			 * above and can result in wp_using_ext_object_cache() returning
+			 * false when actually an external cache is in use.
+			 */
+			wp_using_ext_object_cache( true );
+		}
+	}
+
+	if ( ! wp_using_ext_object_cache() ) {
+		require_once ABSPATH . WPINC . '/cache.php';
+	}
+
+	require_once ABSPATH . WPINC . '/cache-compat.php';
+
+	/*
+	 * If cache supports reset, reset instead of init if already
+	 * initialized. Reset signals to the cache that global IDs
+	 * have changed and it may need to update keys and cleanup caches.
+	 */
+	if ( ! $first_init && function_exists( 'wp_cache_switch_to_blog' ) ) {
+		wp_cache_switch_to_blog( get_current_blog_id() );
+	} elseif ( function_exists( 'wp_cache_init' ) ) {
+		wp_cache_init();
+	}
+
+	if ( function_exists( 'wp_cache_add_global_groups' ) ) {
+		wp_cache_add_global_groups(
+			array(
+				'blog-details',
+				'blog-id-cache',
+				'blog-lookup',
+				'blog_meta',
+				'global-posts',
+				'networks',
+				'network-queries',
+				'sites',
+				'site-details',
+				'site-options',
+				'site-queries',
+				'site-transient',
+				'rss',
+				'users',
+				'user-queries',
+				'user_meta',
+				'useremail',
+				'userlogins',
+				'userslugs',
+			)
+		);
+
+		wp_cache_add_non_persistent_groups( array( 'counts', 'plugins', 'theme_json' ) );
+	}
+
+	$first_init = false;
+}
+
+/**
+ * Redirects to the installer if WordPress is not installed.
+ *
+ * Dies with an error message when Multisite is enabled.
+ *
+ * @since 3.0.0
+ * @access private
+ */
+function wp_not_installed() {
+	if ( is_blog_installed() || wp_installing() ) {
+		return;
+	}
+
+	nocache_headers();
+
+	if ( is_multisite() ) {
+		wp_die( __( 'The site you have requested is not installed properly. Please contact the system administrator.' ) );
+	}
+
+	require ABSPATH . WPINC . '/kses.php';
+	require ABSPATH . WPINC . '/pluggable.php';
+
+	$link = wp_guess_url() . '/wp-admin/install.php';
+
+	wp_redirect( $link );
+	die();
+}
+
+/**
+ * Retrieves an array of must-use plugin files.
+ *
+ * The default directory is wp-content/mu-plugins. To change the default
+ * directory manually, define `WPMU_PLUGIN_DIR` and `WPMU_PLUGIN_URL`
+ * in wp-config.php.
+ *
+ * @since 3.0.0
+ * @access private
+ *
+ * @return string[] Array of absolute paths of files to include.
+ */
+function wp_get_mu_plugins() {
+	$mu_plugins = array();
+
+	if ( ! is_dir( WPMU_PLUGIN_DIR ) ) {
+		return $mu_plugins;
+	}
+
+	$dh = opendir( WPMU_PLUGIN_DIR );
+	if ( ! $dh ) {
+		return $mu_plugins;
+	}
+
+	while ( ( $plugin = readdir( $dh ) ) !== false ) {
+		if ( str_ends_with( $plugin, '.php' ) ) {
+			$mu_plugins[] = WPMU_PLUGIN_DIR . '/' . $plugin;
+		}
+	}
+
+	closedir( $dh );
+
+	sort( $mu_plugins );
+
+	return $mu_plugins;
+}
+
+/**
+ * Retrieves an array of active and valid plugin files.
+ *
+ * While upgrading or installing WordPress, no plugins are returned.
+ *
+ * The default directory is `wp-content/plugins`. To change the default
+ * directory manually, define `WP_PLUGIN_DIR` and `WP_PLUGIN_URL`
+ * in `wp-config.php`.
+ *
+ * @since 3.0.0
+ * @access private
+ *
+ * @return string[] Array of paths to plugin files relative to the plugins directory.
+ */
+function wp_get_active_and_valid_plugins() {
+	$plugins        = array();
+	$active_plugins = (array) get_option( 'active_plugins', array() );
+
+	// Check for hacks file if the option is enabled.
+	if ( get_option( 'hack_file' ) && file_exists( ABSPATH . 'my-hacks.php' ) ) {
+		_deprecated_file( 'my-hacks.php', '1.5.0' );
+		array_unshift( $plugins, ABSPATH . 'my-hacks.php' );
+	}
+
+	if ( empty( $active_plugins ) || wp_installing() ) {
+		return $plugins;
+	}
+
+	$network_plugins = is_multisite() ? wp_get_active_network_plugins() : false;
+
+	foreach ( $active_plugins as $plugin ) {
+		if ( ! validate_file( $plugin )                     // $plugin must validate as file.
+			&& str_ends_with( $plugin, '.php' )             // $plugin must end with '.php'.
+			&& file_exists( WP_PLUGIN_DIR . '/' . $plugin ) // $plugin must exist.
+			// Not already included as a network plugin.
+			&& ( ! $network_plugins || ! in_array( WP_PLUGIN_DIR . '/' . $plugin, $network_plugins, true ) )
+		) {
+			$plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
+		}
+	}
+
+	/*
+	 * Remove plugins from the list of active plugins when we're on an endpoint
+	 * that should be protected against WSODs and the plugin is paused.
+	 */
+	if ( wp_is_recovery_mode() ) {
+		$plugins = wp_skip_paused_plugins( $plugins );
+	}
+
+	return $plugins;
+}
+
+/**
+ * Filters a given list of plugins, removing any paused plugins from it.
+ *
+ * @since 5.2.0
+ *
+ * @param string[] $plugins Array of absolute plugin main file paths.
+ * @return string[] Filtered array of plugins, without any paused plugins.
+ */
+function wp_skip_paused_plugins( array $plugins ) {
+	$paused_plugins = wp_paused_plugins()->get_all();
+
+	if ( empty( $paused_plugins ) ) {
+		return $plugins;
+	}
+
+	foreach ( $plugins as $index => $plugin ) {
+		list( $plugin ) = explode( '/', plugin_basename( $plugin ) );
+
+		if ( array_key_exists( $plugin, $paused_plugins ) ) {
+			unset( $plugins[ $index ] );
+
+			// Store list of paused plugins for displaying an admin notice.
+			$GLOBALS['_paused_plugins'][ $plugin ] = $paused_plugins[ $plugin ];
+		}
+	}
+
+	return $plugins;
+}
+
+/**
+ * Retrieves an array of active and valid themes.
+ *
+ * While upgrading or installing WordPress, no themes are returned.
+ *
+ * @since 5.1.0
+ * @access private
+ *
+ * @global string $pagenow The filename of the current screen.
+ *
+ * @return string[] Array of absolute paths to theme directories.
+ */
+function wp_get_active_and_valid_themes() {
+	global $pagenow;
+
+	$themes = array();
+
+	if ( wp_installing() && 'wp-activate.php' !== $pagenow ) {
+		return $themes;
+	}
+
+	$stylesheet_path = get_stylesheet_directory();
+	$template_path   = get_template_directory();
+
+	if ( $template_path !== $stylesheet_path ) {
+		$themes[] = $stylesheet_path;
+	}
+
+	$themes[] = $template_path;
+
+	/*
+	 * Remove themes from the list of active themes when we're on an endpoint
+	 * that should be protected against WSODs and the theme is paused.
+	 */
+	if ( wp_is_recovery_mode() ) {
+		$themes = wp_skip_paused_themes( $themes );
+
+		// If no active and valid themes exist, skip loading themes.
+		if ( empty( $themes ) ) {
+			add_filter( 'wp_using_themes', '__return_false' );
+		}
+	}
+
+	return $themes;
+}
+
+/**
+ * Filters a given list of themes, removing any paused themes from it.
+ *
+ * @since 5.2.0
+ *
+ * @param string[] $themes Array of absolute theme directory paths.
+ * @return string[] Filtered array of absolute paths to themes, without any paused themes.
+ */
+function wp_skip_paused_themes( array $themes ) {
+	$paused_themes = wp_paused_themes()->get_all();
+
+	if ( empty( $paused_themes ) ) {
+		return $themes;
+	}
+
+	foreach ( $themes as $index => $theme ) {
+		$theme = basename( $theme );
+
+		if ( array_key_exists( $theme, $paused_themes ) ) {
+			unset( $themes[ $index ] );
+
+			// Store list of paused themes for displaying an admin notice.
+			$GLOBALS['_paused_themes'][ $theme ] = $paused_themes[ $theme ];
+		}
+	}
+
+	return $themes;
+}
+
+/**
+ * Determines whether WordPress is in Recovery Mode.
+ *
+ * In this mode, plugins or themes that cause WSODs will be paused.
+ *
+ * @since 5.2.0
+ *
+ * @return bool
+ */
+function wp_is_recovery_mode() {
+	return wp_recovery_mode()->is_active();
+}
+
+/**
+ * Determines whether we are currently on an endpoint that should be protected against WSODs.
+ *
+ * @since 5.2.0
+ *
+ * @global string $pagenow The filename of the current screen.
+ *
+ * @return bool True if the current endpoint should be protected.
+ */
+function is_protected_endpoint() {
+	// Protect login pages.
+	if ( isset( $GLOBALS['pagenow'] ) && 'wp-login.php' === $GLOBALS['pagenow'] ) {
+		return true;
+	}
+
+	// Protect the admin backend.
+	if ( is_admin() && ! wp_doing_ajax() ) {
+		return true;
+	}
+
+	// Protect Ajax actions that could help resolve a fatal error should be available.
+	if ( is_protected_ajax_action() ) {
+		return true;
+	}
+
+	/**
+	 * Filters whether the current request is against a protected endpoint.
+	 *
+	 * This filter is only fired when an endpoint is requested which is not already protected by
+	 * WordPress core. As such, it exclusively allows providing further protected endpoints in
+	 * addition to the admin backend, login pages and protected Ajax actions.
+	 *
+	 * @since 5.2.0
+	 *
+	 * @param bool $is_protected_endpoint Whether the currently requested endpoint is protected.
+	 *                                    Default false.
+	 */
+	return (bool) apply_filters( 'is_protected_endpoint', false );
+}
+
+/**
+ * Determines whether we are currently handling an Ajax action that should be protected against WSODs.
+ *
+ * @since 5.2.0
+ *
+ * @return bool True if the current Ajax action should be protected.
+ */
+function is_protected_ajax_action() {
+	if ( ! wp_doing_ajax() ) {
+		return false;
+	}
+
+	if ( ! isset( $_REQUEST['action'] ) ) {
+		return false;
+	}
+
+	$actions_to_protect = array(
+		'edit-theme-plugin-file', // Saving changes in the core code editor.
+		'heartbeat',              // Keep the heart beating.
+		'install-plugin',         // Installing a new plugin.
+		'install-theme',          // Installing a new theme.
+		'search-plugins',         // Searching in the list of plugins.
+		'search-install-plugins', // Searching for a plugin in the plugin install screen.
+		'update-plugin',          // Update an existing plugin.
+		'update-theme',           // Update an existing theme.
+	);
+
+	/**
+	 * Filters the array of protected Ajax actions.
+	 *
+	 * This filter is only fired when doing Ajax and the Ajax request has an 'action' property.
+	 *
+	 * @since 5.2.0
+	 *
+	 * @param string[] $actions_to_protect Array of strings with Ajax actions to protect.
+	 */
+	$actions_to_protect = (array) apply_filters( 'wp_protected_ajax_actions', $actions_to_protect );
+
+	if ( ! in_array( $_REQUEST['action'], $actions_to_protect, true ) ) {
+		return false;
+	}
+
+	return true;
+}
+
+/**
+ * Sets internal encoding.
+ *
+ * In most cases the default internal encoding is latin1, which is
+ * of no use, since we want to use the `mb_` functions for `utf-8` strings.
+ *
+ * @since 3.0.0
+ * @access private
+ */
+function wp_set_internal_encoding() {
+	if ( function_exists( 'mb_internal_encoding' ) ) {
+		$charset = get_option( 'blog_charset' );
+		// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
+		if ( ! $charset || ! @mb_internal_encoding( $charset ) ) {
+			mb_internal_encoding( 'UTF-8' );
+		}
+	}
+}
+
+/**
+ * Adds magic quotes to `$_GET`, `$_POST`, `$_COOKIE`, and `$_SERVER`.
+ *
+ * Also forces `$_REQUEST` to be `$_GET + $_POST`. If `$_SERVER`,
+ * `$_COOKIE`, or `$_ENV` are needed, use those superglobals directly.
+ *
+ * @since 3.0.0
+ * @access private
+ */
+function wp_magic_quotes() {
+	// Escape with wpdb.
+	$_GET    = add_magic_quotes( $_GET );
+	$_POST   = add_magic_quotes( $_POST );
+	$_COOKIE = add_magic_quotes( $_COOKIE );
+	$_SERVER = add_magic_quotes( $_SERVER );
+
+	// Force REQUEST to be GET + POST.
+	$_REQUEST = array_merge( $_GET, $_POST );
+}
+
+/**
+ * Runs just before PHP shuts down execution.
+ *
+ * @since 1.2.0
+ * @access private
+ */
+function shutdown_action_hook() {
+	/**
+	 * Fires just before PHP shuts down execution.
+	 *
+	 * @since 1.2.0
+	 */
+	do_action( 'shutdown' );
+
+	wp_cache_close();
+}
+
+/**
+ * Clones an object.
+ *
+ * @since 2.7.0
+ * @deprecated 3.2.0
+ *
+ * @param object $input_object The object to clone.
+ * @return object The cloned object.
+ */
+function wp_clone( $input_object ) {
+	// Use parens for clone to accommodate PHP 4. See #17880.
+	return clone( $input_object );
+}
+
+/**
+ * Determines whether the current request is for the login screen.
+ *
+ * @since 6.1.0
+ *
+ * @see wp_login_url()
+ *
+ * @return bool True if inside WordPress login screen, false otherwise.
+ */
+function is_login() {
+	return false !== stripos( wp_login_url(), $_SERVER['SCRIPT_NAME'] );
+}
+
+/**
+ * Determines whether the current request is for an administrative interface page.
+ *
+ * Does not check if the user is an administrator; use current_user_can()
+ * for checking roles and capabilities.
+ *
+ * For more information on this and similar theme functions, check out
+ * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
+ * Conditional Tags} article in the Theme Developer Handbook.
+ *
+ * @since 1.5.1
+ *
+ * @global WP_Screen $current_screen WordPress current screen object.
+ *
+ * @return bool True if inside WordPress administration interface, false otherwise.
+ */
+function is_admin() {
+	if ( isset( $GLOBALS['current_screen'] ) ) {
+		return $GLOBALS['current_screen']->in_admin();
+	} elseif ( defined( 'WP_ADMIN' ) ) {
+		return WP_ADMIN;
+	}
+
+	return false;
+}
+
+/**
+ * Determines whether the current request is for a site's administrative interface.
+ *
+ * e.g. `/wp-admin/`
+ *
+ * Does not check if the user is an administrator; use current_user_can()
+ * for checking roles and capabilities.
+ *
+ * @since 3.1.0
+ *
+ * @global WP_Screen $current_screen WordPress current screen object.
+ *
+ * @return bool True if inside WordPress site administration pages.
+ */
+function is_blog_admin() {
+	if ( isset( $GLOBALS['current_screen'] ) ) {
+		return $GLOBALS['current_screen']->in_admin( 'site' );
+	} elseif ( defined( 'WP_BLOG_ADMIN' ) ) {
+		return WP_BLOG_ADMIN;
+	}
+
+	return false;
+}
+
+/**
+ * Determines whether the current request is for the network administrative interface.
+ *
+ * e.g. `/wp-admin/network/`
+ *
+ * Does not check if the user is an administrator; use current_user_can()
+ * for checking roles and capabilities.
+ *
+ * Does not check if the site is a Multisite network; use is_multisite()
+ * for checking if Multisite is enabled.
+ *
+ * @since 3.1.0
+ *
+ * @global WP_Screen $current_screen WordPress current screen object.
+ *
+ * @return bool True if inside WordPress network administration pages.
+ */
+function is_network_admin() {
+	if ( isset( $GLOBALS['current_screen'] ) ) {
+		return $GLOBALS['current_screen']->in_admin( 'network' );
+	} elseif ( defined( 'WP_NETWORK_ADMIN' ) ) {
+		return WP_NETWORK_ADMIN;
+	}
+
+	return false;
+}
+
+/**
+ * Determines whether the current request is for a user admin screen.
+ *
+ * e.g. `/wp-admin/user/`
+ *
+ * Does not check if the user is an administrator; use current_user_can()
+ * for checking roles and capabilities.
+ *
+ * @since 3.1.0
+ *
+ * @global WP_Screen $current_screen WordPress current screen object.
+ *
+ * @return bool True if inside WordPress user administration pages.
+ */
+function is_user_admin() {
+	if ( isset( $GLOBALS['current_screen'] ) ) {
+		return $GLOBALS['current_screen']->in_admin( 'user' );
+	} elseif ( defined( 'WP_USER_ADMIN' ) ) {
+		return WP_USER_ADMIN;
+	}
+
+	return false;
+}
+
+/**
+ * Determines whether Multisite is enabled.
+ *
+ * @since 3.0.0
+ *
+ * @return bool True if Multisite is enabled, false otherwise.
+ */
+function is_multisite() {
+	if ( defined( 'MULTISITE' ) ) {
+		return MULTISITE;
+	}
+
+	if ( defined( 'SUBDOMAIN_INSTALL' ) || defined( 'VHOST' ) || defined( 'SUNRISE' ) ) {
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * Retrieves the current site ID.
+ *
+ * @since 3.1.0
+ *
+ * @global int $blog_id
+ *
+ * @return int Site ID.
+ */
+function get_current_blog_id() {
+	global $blog_id;
+
+	return absint( $blog_id );
+}
+
+/**
+ * Retrieves the current network ID.
+ *
+ * @since 4.6.0
+ *
+ * @return int The ID of the current network.
+ */
+function get_current_network_id() {
+	if ( ! is_multisite() ) {
+		return 1;
+	}
+
+	$current_network = get_network();
+
+	if ( ! isset( $current_network->id ) ) {
+		return get_main_network_id();
+	}
+
+	return absint( $current_network->id );
+}
+
+/**
+ * Attempts an early load of translations.
+ *
+ * Used for errors encountered during the initial loading process, before
+ * the locale has been properly detected and loaded.
+ *
+ * Designed for unusual load sequences (like setup-config.php) or for when
+ * the script will then terminate with an error, otherwise there is a risk
+ * that a file can be double-included.
+ *
+ * @since 3.4.0
+ * @access private
+ *
+ * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
+ * @global WP_Locale              $wp_locale              WordPress date and time locale object.
+ */
+function wp_load_translations_early() {
+	global $wp_textdomain_registry, $wp_locale;
+	static $loaded = false;
+
+	if ( $loaded ) {
+		return;
+	}
+
+	$loaded = true;
+
+	if ( function_exists( 'did_action' ) && did_action( 'init' ) ) {
+		return;
+	}
+
+	// We need $wp_local_package.
+	require ABSPATH . WPINC . '/version.php';
+
+	// Translation and localization.
+	require_once ABSPATH . WPINC . '/pomo/mo.php';
+	require_once ABSPATH . WPINC . '/l10n.php';
+	require_once ABSPATH . WPINC . '/class-wp-textdomain-registry.php';
+	require_once ABSPATH . WPINC . '/class-wp-locale.php';
+	require_once ABSPATH . WPINC . '/class-wp-locale-switcher.php';
+
+	// General libraries.
+	require_once ABSPATH . WPINC . '/plugin.php';
+
+	$locales   = array();
+	$locations = array();
+
+	if ( ! $wp_textdomain_registry instanceof WP_Textdomain_Registry ) {
+		$wp_textdomain_registry = new WP_Textdomain_Registry();
+	}
+
+	while ( true ) {
+		if ( defined( 'WPLANG' ) ) {
+			if ( '' === WPLANG ) {
+				break;
+			}
+			$locales[] = WPLANG;
+		}
+
+		if ( isset( $wp_local_package ) ) {
+			$locales[] = $wp_local_package;
+		}
+
+		if ( ! $locales ) {
+			break;
+		}
+
+		if ( defined( 'WP_LANG_DIR' ) && @is_dir( WP_LANG_DIR ) ) {
+			$locations[] = WP_LANG_DIR;
+		}
+
+		if ( defined( 'WP_CONTENT_DIR' ) && @is_dir( WP_CONTENT_DIR . '/languages' ) ) {
+			$locations[] = WP_CONTENT_DIR . '/languages';
+		}
+
+		if ( @is_dir( ABSPATH . 'wp-content/languages' ) ) {
+			$locations[] = ABSPATH . 'wp-content/languages';
+		}
+
+		if ( @is_dir( ABSPATH . WPINC . '/languages' ) ) {
+			$locations[] = ABSPATH . WPINC . '/languages';
+		}
+
+		if ( ! $locations ) {
+			break;
+		}
+
+		$locations = array_unique( $locations );
+
+		foreach ( $locales as $locale ) {
+			foreach ( $locations as $location ) {
+				if ( file_exists( $location . '/' . $locale . '.mo' ) ) {
+					load_textdomain( 'default', $location . '/' . $locale . '.mo', $locale );
+
+					if ( defined( 'WP_SETUP_CONFIG' ) && file_exists( $location . '/admin-' . $locale . '.mo' ) ) {
+						load_textdomain( 'default', $location . '/admin-' . $locale . '.mo', $locale );
+					}
+
+					break 2;
+				}
+			}
+		}
+
+		break;
+	}
+
+	$wp_locale = new WP_Locale();
+}
+
+/**
+ * Checks or sets whether WordPress is in "installation" mode.
+ *
+ * If the `WP_INSTALLING` constant is defined during the bootstrap, `wp_installing()` will default to `true`.
+ *
+ * @since 4.4.0
+ *
+ * @param bool $is_installing Optional. True to set WP into Installing mode, false to turn Installing mode off.
+ *                            Omit this parameter if you only want to fetch the current status.
+ * @return bool True if WP is installing, otherwise false. When a `$is_installing` is passed, the function will
+ *              report whether WP was in installing mode prior to the change to `$is_installing`.
+ */
+function wp_installing( $is_installing = null ) {
+	static $installing = null;
+
+	// Support for the `WP_INSTALLING` constant, defined before WP is loaded.
+	if ( is_null( $installing ) ) {
+		$installing = defined( 'WP_INSTALLING' ) && WP_INSTALLING;
+	}
+
+	if ( ! is_null( $is_installing ) ) {
+		$old_installing = $installing;
+		$installing     = $is_installing;
+
+		return (bool) $old_installing;
+	}
+
+	return (bool) $installing;
+}
+
+/**
+ * Determines if SSL is used.
+ *
+ * @since 2.6.0
+ * @since 4.6.0 Moved from functions.php to load.php.
+ *
+ * @return bool True if SSL, otherwise false.
+ */
+function is_ssl() {
+	if ( isset( $_SERVER['HTTPS'] ) ) {
+		if ( 'on' === strtolower( $_SERVER['HTTPS'] ) ) {
+			return true;
+		}
+
+		if ( '1' === (string) $_SERVER['HTTPS'] ) {
+			return true;
+		}
+	} elseif ( isset( $_SERVER['SERVER_PORT'] ) && ( '443' === (string) $_SERVER['SERVER_PORT'] ) ) {
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * Converts a shorthand byte value to an integer byte value.
+ *
+ * @since 2.3.0
+ * @since 4.6.0 Moved from media.php to load.php.
+ *
+ * @link https://www.php.net/manual/en/function.ini-get.php
+ * @link https://www.php.net/manual/en/faq.using.php#faq.using.shorthandbytes
+ *
+ * @param string $value A (PHP ini) byte value, either shorthand or ordinary.
+ * @return int An integer byte value.
+ */
+function wp_convert_hr_to_bytes( $value ) {
+	$value = strtolower( trim( $value ) );
+	$bytes = (int) $value;
+
+	if ( str_contains( $value, 'g' ) ) {
+		$bytes *= GB_IN_BYTES;
+	} elseif ( str_contains( $value, 'm' ) ) {
+		$bytes *= MB_IN_BYTES;
+	} elseif ( str_contains( $value, 'k' ) ) {
+		$bytes *= KB_IN_BYTES;
+	}
+
+	// Deal with large (float) values which run into the maximum integer size.
+	return min( $bytes, PHP_INT_MAX );
+}
+
+/**
+ * Determines whether a PHP ini value is changeable at runtime.
+ *
+ * @since 4.6.0
+ *
+ * @link https://www.php.net/manual/en/function.ini-get-all.php
+ *
+ * @param string $setting The name of the ini setting to check.
+ * @return bool True if the value is changeable at runtime. False otherwise.
+ */
+function wp_is_ini_value_changeable( $setting ) {
+	static $ini_all;
+
+	if ( ! isset( $ini_all ) ) {
+		$ini_all = false;
+		// Sometimes `ini_get_all()` is disabled via the `disable_functions` option for "security purposes".
+		if ( function_exists( 'ini_get_all' ) ) {
+			$ini_all = ini_get_all();
+		}
+	}
+
+	// Bit operator to workaround https://bugs.php.net/bug.php?id=44936 which changes access level to 63 in PHP 5.2.6 - 5.2.17.
+	if ( isset( $ini_all[ $setting ]['access'] )
+		&& ( INI_ALL === ( $ini_all[ $setting ]['access'] & 7 ) || INI_USER === ( $ini_all[ $setting ]['access'] & 7 ) )
+	) {
+		return true;
+	}
+
+	// If we were unable to retrieve the details, fail gracefully to assume it's changeable.
+	if ( ! is_array( $ini_all ) ) {
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * Determines whether the current request is a WordPress Ajax request.
+ *
+ * @since 4.7.0
+ *
+ * @return bool True if it's a WordPress Ajax request, false otherwise.
+ */
+function wp_doing_ajax() {
+	/**
+	 * Filters whether the current request is a WordPress Ajax request.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param bool $wp_doing_ajax Whether the current request is a WordPress Ajax request.
+	 */
+	return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX );
+}
+
+/**
+ * Determines whether the current request should use themes.
+ *
+ * @since 5.1.0
+ *
+ * @return bool True if themes should be used, false otherwise.
+ */
+function wp_using_themes() {
+	/**
+	 * Filters whether the current request should use themes.
+	 *
+	 * @since 5.1.0
+	 *
+	 * @param bool $wp_using_themes Whether the current request should use themes.
+	 */
+	return apply_filters( 'wp_using_themes', defined( 'WP_USE_THEMES' ) && WP_USE_THEMES );
+}
+
+/**
+ * Determines whether the current request is a WordPress cron request.
+ *
+ * @since 4.8.0
+ *
+ * @return bool True if it's a WordPress cron request, false otherwise.
+ */
+function wp_doing_cron() {
+	/**
+	 * Filters whether the current request is a WordPress cron request.
+	 *
+	 * @since 4.8.0
+	 *
+	 * @param bool $wp_doing_cron Whether the current request is a WordPress cron request.
+	 */
+	return apply_filters( 'wp_doing_cron', defined( 'DOING_CRON' ) && DOING_CRON );
+}
+
+/**
+ * Checks whether the given variable is a WordPress Error.
+ *
+ * Returns whether `$thing` is an instance of the `WP_Error` class.
+ *
+ * @since 2.1.0
+ *
+ * @param mixed $thing The variable to check.
+ * @return bool Whether the variable is an instance of WP_Error.
+ */
+function is_wp_error( $thing ) {
+	$is_wp_error = ( $thing instanceof WP_Error );
+
+	if ( $is_wp_error ) {
+		/**
+		 * Fires when `is_wp_error()` is called and its parameter is an instance of `WP_Error`.
+		 *
+		 * @since 5.6.0
+		 *
+		 * @param WP_Error $thing The error object passed to `is_wp_error()`.
+		 */
+		do_action( 'is_wp_error_instance', $thing );
+	}
+
+	return $is_wp_error;
+}
+
+/**
+ * Determines whether file modifications are allowed.
+ *
+ * @since 4.8.0
+ *
+ * @param string $context The usage context.
+ * @return bool True if file modification is allowed, false otherwise.
+ */
+function wp_is_file_mod_allowed( $context ) {
+	/**
+	 * Filters whether file modifications are allowed.
+	 *
+	 * @since 4.8.0
+	 *
+	 * @param bool   $file_mod_allowed Whether file modifications are allowed.
+	 * @param string $context          The usage context.
+	 */
+	return apply_filters( 'file_mod_allowed', ! defined( 'DISALLOW_FILE_MODS' ) || ! DISALLOW_FILE_MODS, $context );
+}
+
+/**
+ * Starts scraping edited file errors.
+ *
+ * @since 4.9.0
+ */
+function wp_start_scraping_edited_file_errors() {
+	if ( ! isset( $_REQUEST['wp_scrape_key'] ) || ! isset( $_REQUEST['wp_scrape_nonce'] ) ) {
+		return;
+	}
+
+	$key   = substr( sanitize_key( wp_unslash( $_REQUEST['wp_scrape_key'] ) ), 0, 32 );
+	$nonce = wp_unslash( $_REQUEST['wp_scrape_nonce'] );
+
+	if ( get_transient( 'scrape_key_' . $key ) !== $nonce ) {
+		echo "###### wp_scraping_result_start:$key ######";
+		echo wp_json_encode(
+			array(
+				'code'    => 'scrape_nonce_failure',
+				'message' => __( 'Scrape key check failed. Please try again.' ),
+			)
+		);
+		echo "###### wp_scraping_result_end:$key ######";
+		die();
+	}
+
+	if ( ! defined( 'WP_SANDBOX_SCRAPING' ) ) {
+		define( 'WP_SANDBOX_SCRAPING', true );
+	}
+
+	register_shutdown_function( 'wp_finalize_scraping_edited_file_errors', $key );
+}
+
+/**
+ * Finalizes scraping for edited file errors.
+ *
+ * @since 4.9.0
+ *
+ * @param string $scrape_key Scrape key.
+ */
+function wp_finalize_scraping_edited_file_errors( $scrape_key ) {
+	$error = error_get_last();
+
+	echo "\n###### wp_scraping_result_start:$scrape_key ######\n";
+
+	if ( ! empty( $error )
+		&& in_array( $error['type'], array( E_CORE_ERROR, E_COMPILE_ERROR, E_ERROR, E_PARSE, E_USER_ERROR, E_RECOVERABLE_ERROR ), true )
+	) {
+		$error = str_replace( ABSPATH, '', $error );
+		echo wp_json_encode( $error );
+	} else {
+		echo wp_json_encode( true );
+	}
+
+	echo "\n###### wp_scraping_result_end:$scrape_key ######\n";
+}
+
+/**
+ * Checks whether current request is a JSON request, or is expecting a JSON response.
+ *
+ * @since 5.0.0
+ *
+ * @return bool True if `Accepts` or `Content-Type` headers contain `application/json`.
+ *              False otherwise.
+ */
+function wp_is_json_request() {
+	if ( isset( $_SERVER['HTTP_ACCEPT'] ) && wp_is_json_media_type( $_SERVER['HTTP_ACCEPT'] ) ) {
+		return true;
+	}
+
+	if ( isset( $_SERVER['CONTENT_TYPE'] ) && wp_is_json_media_type( $_SERVER['CONTENT_TYPE'] ) ) {
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * Checks whether current request is a JSONP request, or is expecting a JSONP response.
+ *
+ * @since 5.2.0
+ *
+ * @return bool True if JSONP request, false otherwise.
+ */
+function wp_is_jsonp_request() {
+	if ( ! isset( $_GET['_jsonp'] ) ) {
+		return false;
+	}
+
+	if ( ! function_exists( 'wp_check_jsonp_callback' ) ) {
+		require_once ABSPATH . WPINC . '/functions.php';
+	}
+
+	$jsonp_callback = $_GET['_jsonp'];
+	if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) {
+		return false;
+	}
+
+	/** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */
+	$jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true );
+
+	return $jsonp_enabled;
+}
+
+/**
+ * Checks whether a string is a valid JSON Media Type.
+ *
+ * @since 5.6.0
+ *
+ * @param string $media_type A Media Type string to check.
+ * @return bool True if string is a valid JSON Media Type.
+ */
+function wp_is_json_media_type( $media_type ) {
+	static $cache = array();
+
+	if ( ! isset( $cache[ $media_type ] ) ) {
+		$cache[ $media_type ] = (bool) preg_match( '/(^|\s|,)application\/([\w!#\$&-\^\.\+]+\+)?json(\+oembed)?($|\s|;|,)/i', $media_type );
+	}
+
+	return $cache[ $media_type ];
+}
+
+/**
+ * Checks whether current request is an XML request, or is expecting an XML response.
+ *
+ * @since 5.2.0
+ *
+ * @return bool True if `Accepts` or `Content-Type` headers contain `text/xml`
+ *              or one of the related MIME types. False otherwise.
+ */
+function wp_is_xml_request() {
+	$accepted = array(
+		'text/xml',
+		'application/rss+xml',
+		'application/atom+xml',
+		'application/rdf+xml',
+		'text/xml+oembed',
+		'application/xml+oembed',
+	);
+
+	if ( isset( $_SERVER['HTTP_ACCEPT'] ) ) {
+		foreach ( $accepted as $type ) {
+			if ( str_contains( $_SERVER['HTTP_ACCEPT'], $type ) ) {
+				return true;
+			}
+		}
+	}
+
+	if ( isset( $_SERVER['CONTENT_TYPE'] ) && in_array( $_SERVER['CONTENT_TYPE'], $accepted, true ) ) {
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * Checks if this site is protected by HTTP Basic Auth.
+ *
+ * At the moment, this merely checks for the present of Basic Auth credentials. Therefore, calling
+ * this function with a context different from the current context may give inaccurate results.
+ * In a future release, this evaluation may be made more robust.
+ *
+ * Currently, this is only used by Application Passwords to prevent a conflict since it also utilizes
+ * Basic Auth.
+ *
+ * @since 5.6.1
+ *
+ * @global string $pagenow The filename of the current screen.
+ *
+ * @param string $context The context to check for protection. Accepts 'login', 'admin', and 'front'.
+ *                        Defaults to the current context.
+ * @return bool Whether the site is protected by Basic Auth.
+ */
+function wp_is_site_protected_by_basic_auth( $context = '' ) {
+	global $pagenow;
+
+	if ( ! $context ) {
+		if ( 'wp-login.php' === $pagenow ) {
+			$context = 'login';
+		} elseif ( is_admin() ) {
+			$context = 'admin';
+		} else {
+			$context = 'front';
+		}
+	}
+
+	$is_protected = ! empty( $_SERVER['PHP_AUTH_USER'] ) || ! empty( $_SERVER['PHP_AUTH_PW'] );
+
+	/**
+	 * Filters whether a site is protected by HTTP Basic Auth.
+	 *
+	 * @since 5.6.1
+	 *
+	 * @param bool $is_protected Whether the site is protected by Basic Auth.
+	 * @param string $context    The context to check for protection. One of 'login', 'admin', or 'front'.
+	 */
+	return apply_filters( 'wp_is_site_protected_by_basic_auth', $is_protected, $context );
+}