enmi-conf.org: comparison wp/wp-admin/includes/plugin.php

equal deleted inserted replaced

-:3d4e9c994f10
+:a86126ab1dd4
 */
 /**
 * Parses the plugin contents to retrieve plugin's metadata.
 *
-* The metadata of the plugin's data searches for the following in the plugin's
+* All plugin headers must be on their own line. Plugin description must not have
-* header. All plugin data must be on its own line. For plugin description, it
+* any newlines, otherwise only parts of the description will be displayed.
-* must not have any newlines or only parts of the description will be displayed
+* The below is formatted for printing.
-* and the same goes for the plugin data. The below is formatted for printing.
 *
 *     /*
-*     Plugin Name: Name of Plugin
+*     Plugin Name: Name of the plugin.
-*     Plugin URI: Link to plugin information
+*     Plugin URI: The home page of the plugin.
-*     Description: Plugin Description
+*     Description: Plugin description.
-*     Author: Plugin author's name
+*     Author: Plugin author's name.
-*     Author URI: Link to the author's web site
+*     Author URI: Link to the author's website.
-*     Version: Must be set in the plugin for WordPress 2.3+
+*     Version: Plugin version.
 *     Text Domain: Optional. Unique identifier, should be same as the one used in
-*          load_plugin_textdomain()
+*          load_plugin_textdomain().
 *     Domain Path: Optional. Only useful if the translations are located in a
 *          folder above the plugin's base path. For example, if .mo files are
 *          located in the locale folder then Domain Path will be "/locale/" and
 *          must have the first slash. Defaults to the base folder the plugin is
 *          located in.
 *     Network: Optional. Specify "Network: true" to require that a plugin is activated
 *          across all sites in an installation. This will prevent a plugin from being
 *          activated on a single site when Multisite is enabled.
-*      * / # Remove the space to close comment
+*     Requires at least: Optional. Specify the minimum required WordPress version.
-*
+*     Requires PHP: Optional. Specify the minimum required PHP version.
-* Some users have issues with opening large files and manipulating the contents
+*     * / # Remove the space to close comment.
-* for want is usually the first 1kiB or 2kiB. This function stops pulling in
+*
-* the plugin contents when it has all of the required plugin data.
+* The first 8 KB of the file will be pulled in and if the plugin data is not
-*
+* within that first 8 KB, then the plugin author should correct their plugin
-* The first 8kiB of the file will be pulled in and if the plugin data is not
-* within that first 8kiB, then the plugin author should correct their plugin
 * and move the plugin data headers to the top.
 *
 * The plugin file is assumed to have permissions to allow for scripts to read
 * the file. This is not checked however and the file is only opened for
 * reading.
 *
 * @since 1.5.0
+* @since 5.3.0 Added support for `Requires at least` and `Requires PHP` headers.
 *
 * @param string $plugin_file Absolute path to the main plugin file.
+* @param bool   $markup      Optional. If the returned data should have HTML markup applied.
+*                            Default true.
+* @param bool   $translate   Optional. If the returned data should be translated. Default true.
+* @return array {
+*     Plugin data. Values will be empty if not supplied by the plugin.
+*
+*     @type string $Name        Name of the plugin. Should be unique.
+*     @type string $Title       Title of the plugin and link to the plugin's site (if set).
+*     @type string $Description Plugin description.
+*     @type string $Author      Author's name.
+*     @type string $AuthorURI   Author's website address (if set).
+*     @type string $Version     Plugin version.
+*     @type string $TextDomain  Plugin textdomain.
+*     @type string $DomainPath  Plugins relative directory path to .mo files.
+*     @type bool   $Network     Whether the plugin can only be activated network-wide.
+*     @type string $RequiresWP  Minimum required version of WordPress.
+*     @type string $RequiresPHP Minimum required version of PHP.
+* }
+*/
+function get_plugin_data( $plugin_file, $markup = true, $translate = true ) {
+	$default_headers = array(
+		'Name'        => 'Plugin Name',
+		'PluginURI'   => 'Plugin URI',
+		'Version'     => 'Version',
+		'Description' => 'Description',
+		'Author'      => 'Author',
+		'AuthorURI'   => 'Author URI',
+		'TextDomain'  => 'Text Domain',
+		'DomainPath'  => 'Domain Path',
+		'Network'     => 'Network',
+		'RequiresWP'  => 'Requires at least',
+		'RequiresPHP' => 'Requires PHP',
+		// Site Wide Only is deprecated in favor of Network.
+		'_sitewide'   => 'Site Wide Only',
+	);
+	$plugin_data = get_file_data( $plugin_file, $default_headers, 'plugin' );
+	// Site Wide Only is the old header for Network.
+	if ( ! $plugin_data['Network'] && $plugin_data['_sitewide'] ) {
+		/* translators: 1: Site Wide Only: true, 2: Network: true */
+		_deprecated_argument( __FUNCTION__, '3.0.0', sprintf( __( 'The %1$s plugin header is deprecated. Use %2$s instead.' ), '<code>Site Wide Only: true</code>', '<code>Network: true</code>' ) );
+		$plugin_data['Network'] = $plugin_data['_sitewide'];
+	}
+	$plugin_data['Network'] = ( 'true' === strtolower( $plugin_data['Network'] ) );
+	unset( $plugin_data['_sitewide'] );
+	// If no text domain is defined fall back to the plugin slug.
+	if ( ! $plugin_data['TextDomain'] ) {
+		$plugin_slug = dirname( plugin_basename( $plugin_file ) );
+		if ( '.' !== $plugin_slug && false === strpos( $plugin_slug, '/' ) ) {
+			$plugin_data['TextDomain'] = $plugin_slug;
+		}
+	}
+	if ( $markup || $translate ) {
+		$plugin_data = _get_plugin_data_markup_translate( $plugin_file, $plugin_data, $markup, $translate );
+	} else {
+		$plugin_data['Title']      = $plugin_data['Name'];
+		$plugin_data['AuthorName'] = $plugin_data['Author'];
+	}
+	return $plugin_data;
+}
+/**
+* Sanitizes plugin data, optionally adds markup, optionally translates.
+*
+* @since 2.7.0
+*
+* @see get_plugin_data()
+*
+* @access private
+*
+* @param string $plugin_file Path to the main plugin file.
+* @param array  $plugin_data An array of plugin data. See `get_plugin_data()`.
 * @param bool   $markup      Optional. If the returned data should have HTML markup applied.
 *                            Default true.
 * @param bool   $translate   Optional. If the returned data should be translated. Default true.
 * @return array {
 *     Plugin data. Values will be empty if not supplied by the plugin.
 *     @type string $TextDomain  Plugin textdomain.
 *     @type string $DomainPath  Plugins relative directory path to .mo files.
 *     @type bool   $Network     Whether the plugin can only be activated network-wide.
 * }
 */
-function get_plugin_data( $plugin_file, $markup = true, $translate = true ) {
-	$default_headers = array(
-		'Name'        => 'Plugin Name',
-		'PluginURI'   => 'Plugin URI',
-		'Version'     => 'Version',
-		'Description' => 'Description',
-		'Author'      => 'Author',
-		'AuthorURI'   => 'Author URI',
-		'TextDomain'  => 'Text Domain',
-		'DomainPath'  => 'Domain Path',
-		'Network'     => 'Network',
-		// Site Wide Only is deprecated in favor of Network.
-		'_sitewide'   => 'Site Wide Only',
-	);
-	$plugin_data = get_file_data( $plugin_file, $default_headers, 'plugin' );
-	// Site Wide Only is the old header for Network
-	if ( ! $plugin_data['Network'] && $plugin_data['_sitewide'] ) {
-		/* translators: 1: Site Wide Only: true, 2: Network: true */
-		_deprecated_argument( __FUNCTION__, '3.0.0', sprintf( __( 'The %1$s plugin header is deprecated. Use %2$s instead.' ), '<code>Site Wide Only: true</code>', '<code>Network: true</code>' ) );
-		$plugin_data['Network'] = $plugin_data['_sitewide'];
-	}
-	$plugin_data['Network'] = ( 'true' == strtolower( $plugin_data['Network'] ) );
-	unset( $plugin_data['_sitewide'] );
-	// If no text domain is defined fall back to the plugin slug.
-	if ( ! $plugin_data['TextDomain'] ) {
-		$plugin_slug = dirname( plugin_basename( $plugin_file ) );
-		if ( '.' !== $plugin_slug && false === strpos( $plugin_slug, '/' ) ) {
-			$plugin_data['TextDomain'] = $plugin_slug;
-		}
-	}
-	if ( $markup || $translate ) {
-		$plugin_data = _get_plugin_data_markup_translate( $plugin_file, $plugin_data, $markup, $translate );
-	} else {
-		$plugin_data['Title']      = $plugin_data['Name'];
-		$plugin_data['AuthorName'] = $plugin_data['Author'];
-	}
-	return $plugin_data;
-}
-/**
-* Sanitizes plugin data, optionally adds markup, optionally translates.
-*
-* @since 2.7.0
-*
-* @see get_plugin_data()
-*
-* @access private
-*
-* @param string $plugin_file Path to the main plugin file.
-* @param array  $plugin_data An array of plugin data. See `get_plugin_data()`.
-* @param bool   $markup      Optional. If the returned data should have HTML markup applied.
-*                            Default true.
-* @param bool   $translate   Optional. If the returned data should be translated. Default true.
-* @return array {
-*     Plugin data. Values will be empty if not supplied by the plugin.
-*
-*     @type string $Name        Name of the plugin. Should be unique.
-*     @type string $Title       Title of the plugin and link to the plugin's site (if set).
-*     @type string $Description Plugin description.
-*     @type string $Author      Author's name.
-*     @type string $AuthorURI   Author's website address (if set).
-*     @type string $Version     Plugin version.
-*     @type string $TextDomain  Plugin textdomain.
-*     @type string $DomainPath  Plugins relative directory path to .mo files.
-*     @type bool   $Network     Whether the plugin can only be activated network-wide.
-* }
-*/
 function _get_plugin_data_markup_translate( $plugin_file, $plugin_data, $markup = true, $translate = true ) {
-	// Sanitize the plugin filename to a WP_PLUGIN_DIR relative path
+	// Sanitize the plugin filename to a WP_PLUGIN_DIR relative path.
 	$plugin_file = plugin_basename( $plugin_file );
-	// Translate fields
+	// Translate fields.
 	if ( $translate ) {
-		if ( $textdomain = $plugin_data['TextDomain'] ) {
+		$textdomain = $plugin_data['TextDomain'];
+		if ( $textdomain ) {
 			if ( ! is_textdomain_loaded( $textdomain ) ) {
 				if ( $plugin_data['DomainPath'] ) {
 					load_plugin_textdomain( $textdomain, false, dirname( $plugin_file ) . $plugin_data['DomainPath'] );
 				} else {
 					load_plugin_textdomain( $textdomain, false, dirname( $plugin_file ) );
 				}
 			}
-		} elseif ( 'hello.php' == basename( $plugin_file ) ) {
+		} elseif ( 'hello.php' === basename( $plugin_file ) ) {
 			$textdomain = 'default';
 		}
 		if ( $textdomain ) {
 			foreach ( array( 'Name', 'PluginURI', 'Description', 'Author', 'AuthorURI', 'Version' ) as $field ) {
 				// phpcs:ignore WordPress.WP.I18n.LowLevelTranslationFunction,WordPress.WP.I18n.NonSingularStringLiteralText,WordPress.WP.I18n.NonSingularStringLiteralDomain
 				$plugin_data[ $field ] = translate( $plugin_data[ $field ], $textdomain );
 			}
 		}
 	}
-	// Sanitize fields
+	// Sanitize fields.
 	$allowed_tags_in_links = array(
 		'abbr'    => array( 'title' => true ),
 		'acronym' => array( 'title' => true ),
 		'code'    => true,
 		'em'      => true,
 	$plugin_data['AuthorURI'] = esc_url( $plugin_data['AuthorURI'] );
 	$plugin_data['Title']      = $plugin_data['Name'];
 	$plugin_data['AuthorName'] = $plugin_data['Author'];
-	// Apply markup
+	// Apply markup.
 	if ( $markup ) {
 		if ( $plugin_data['PluginURI'] && $plugin_data['Name'] ) {
 			$plugin_data['Title'] = '<a href="' . $plugin_data['PluginURI'] . '">' . $plugin_data['Name'] . '</a>';
 		}
 		}
 		$plugin_data['Description'] = wptexturize( $plugin_data['Description'] );
 		if ( $plugin_data['Author'] ) {
-			$plugin_data['Description'] .= ' <cite>' . sprintf( __( 'By %s.' ), $plugin_data['Author'] ) . '</cite>';
+			$plugin_data['Description'] .= sprintf(
+				/* translators: %s: Plugin author. */
+				' <cite>' . __( 'By %s.' ) . '</cite>',
+				$plugin_data['Author']
+			);
 		}
 	}
 	return $plugin_data;
 }
 * Get a list of a plugin's files.
 *
 * @since 2.8.0
 *
 * @param string $plugin Path to the plugin file relative to the plugins directory.
-* @return array List of files relative to the plugin root.
+* @return string[] Array of file names relative to the plugin root.
 */
 function get_plugin_files( $plugin ) {
 	$plugin_file = WP_PLUGIN_DIR . '/' . $plugin;
 	$dir         = dirname( $plugin_file );
 * optimization purposes.
 *
 * @since 1.5.0
 *
 * @param string $plugin_folder Optional. Relative path to single plugin folder.
-* @return array Key is the plugin file path and the value is an array of the plugin data.
+* @return array[] Array of arrays of plugin data, keyed by plugin file name. See `get_plugin_data()`.
 */
 function get_plugins( $plugin_folder = '' ) {
 	$cache_plugins = wp_cache_get( 'plugins', 'plugins' );
 	if ( ! $cache_plugins ) {
 	$plugin_root = WP_PLUGIN_DIR;
 	if ( ! empty( $plugin_folder ) ) {
 		$plugin_root .= $plugin_folder;
 	}
-	// Files in wp-content/plugins directory
+	// Files in wp-content/plugins directory.
 	$plugins_dir  = @ opendir( $plugin_root );
 	$plugin_files = array();
 	if ( $plugins_dir ) {
 		while ( ( $file = readdir( $plugins_dir ) ) !== false ) {
-			if ( substr( $file, 0, 1 ) == '.' ) {
+			if ( '.' === substr( $file, 0, 1 ) ) {
 				continue;
 			}
 			if ( is_dir( $plugin_root . '/' . $file ) ) {
 				$plugins_subdir = @ opendir( $plugin_root . '/' . $file );
 				if ( $plugins_subdir ) {
 					while ( ( $subfile = readdir( $plugins_subdir ) ) !== false ) {
-						if ( substr( $subfile, 0, 1 ) == '.' ) {
+						if ( '.' === substr( $subfile, 0, 1 ) ) {
 							continue;
 						}
-						if ( substr( $subfile, -4 ) == '.php' ) {
+						if ( '.php' === substr( $subfile, -4 ) ) {
 							$plugin_files[] = "$file/$subfile";
 						}
 					}
 					closedir( $plugins_subdir );
 				}
 			} else {
-				if ( substr( $file, -4 ) == '.php' ) {
+				if ( '.php' === substr( $file, -4 ) ) {
 					$plugin_files[] = $file;
 				}
 			}
 		}
 		closedir( $plugins_dir );
 	}
 	if ( empty( $plugin_files ) ) {
 		return $wp_plugins;
 	foreach ( $plugin_files as $plugin_file ) {
 		if ( ! is_readable( "$plugin_root/$plugin_file" ) ) {
 			continue;
 		}
-		$plugin_data = get_plugin_data( "$plugin_root/$plugin_file", false, false ); //Do not apply markup/translate as it'll be cached.
+		// Do not apply markup/translate as it will be cached.
+		$plugin_data = get_plugin_data( "$plugin_root/$plugin_file", false, false );
 		if ( empty( $plugin_data['Name'] ) ) {
 			continue;
 		}
 * Check the mu-plugins directory and retrieve all mu-plugin files with any plugin data.
 *
 * WordPress only includes mu-plugin files in the base mu-plugins directory (wp-content/mu-plugins).
 *
 * @since 3.0.0
-* @return array Key is the mu-plugin file path and the value is an array of the mu-plugin data.
+* @return array[] Array of arrays of mu-plugin data, keyed by plugin file name. See `get_plugin_data()`.
 */
 function get_mu_plugins() {
-	$wp_plugins = array();
+	$wp_plugins   = array();
-	// Files in wp-content/mu-plugins directory
 	$plugin_files = array();
 	if ( ! is_dir( WPMU_PLUGIN_DIR ) ) {
 		return $wp_plugins;
 	}
-	if ( $plugins_dir = @ opendir( WPMU_PLUGIN_DIR ) ) {
+	// Files in wp-content/mu-plugins directory.
+	$plugins_dir = @opendir( WPMU_PLUGIN_DIR );
+	if ( $plugins_dir ) {
 		while ( ( $file = readdir( $plugins_dir ) ) !== false ) {
-			if ( substr( $file, -4 ) == '.php' ) {
+			if ( '.php' === substr( $file, -4 ) ) {
 				$plugin_files[] = $file;
 			}
 		}
 	} else {
 		return $wp_plugins;
 	}
-	@closedir( $plugins_dir );
+	closedir( $plugins_dir );
 	if ( empty( $plugin_files ) ) {
 		return $wp_plugins;
 	}
 	foreach ( $plugin_files as $plugin_file ) {
 		if ( ! is_readable( WPMU_PLUGIN_DIR . "/$plugin_file" ) ) {
 			continue;
 		}
-		$plugin_data = get_plugin_data( WPMU_PLUGIN_DIR . "/$plugin_file", false, false ); //Do not apply markup/translate as it'll be cached.
+		// Do not apply markup/translate as it will be cached.
+		$plugin_data = get_plugin_data( WPMU_PLUGIN_DIR . "/$plugin_file", false, false );
 		if ( empty( $plugin_data['Name'] ) ) {
 			$plugin_data['Name'] = $plugin_file;
 		}
 		$wp_plugins[ $plugin_file ] = $plugin_data;
 	}
-	if ( isset( $wp_plugins['index.php'] ) && filesize( WPMU_PLUGIN_DIR . '/index.php' ) <= 30 ) { // silence is golden
+	if ( isset( $wp_plugins['index.php'] ) && filesize( WPMU_PLUGIN_DIR . '/index.php' ) <= 30 ) {
+		// Silence is golden.
 		unset( $wp_plugins['index.php'] );
 	}
 	uasort( $wp_plugins, '_sort_uname_callback' );
 /**
 * Check the wp-content directory and retrieve all drop-ins with any plugin data.
 *
 * @since 3.0.0
-* @return array Key is the file path and the value is an array of the plugin data.
+* @return array[] Array of arrays of dropin plugin data, keyed by plugin file name. See `get_plugin_data()`.
 */
 function get_dropins() {
 	$dropins      = array();
 	$plugin_files = array();
 	$_dropins = _get_dropins();
-	// These exist in the wp-content directory
+	// Files in wp-content directory.
-	if ( $plugins_dir = @ opendir( WP_CONTENT_DIR ) ) {
+	$plugins_dir = @opendir( WP_CONTENT_DIR );
+	if ( $plugins_dir ) {
 		while ( ( $file = readdir( $plugins_dir ) ) !== false ) {
 			if ( isset( $_dropins[ $file ] ) ) {
 				$plugin_files[] = $file;
 			}
 		}
 	} else {
 		return $dropins;
 	}
-	@closedir( $plugins_dir );
+	closedir( $plugins_dir );
 	if ( empty( $plugin_files ) ) {
 		return $dropins;
 	}
 	foreach ( $plugin_files as $plugin_file ) {
 		if ( ! is_readable( WP_CONTENT_DIR . "/$plugin_file" ) ) {
 			continue;
 		}
-		$plugin_data = get_plugin_data( WP_CONTENT_DIR . "/$plugin_file", false, false ); //Do not apply markup/translate as it'll be cached.
+		// Do not apply markup/translate as it will be cached.
+		$plugin_data = get_plugin_data( WP_CONTENT_DIR . "/$plugin_file", false, false );
 		if ( empty( $plugin_data['Name'] ) ) {
 			$plugin_data['Name'] = $plugin_file;
 		}
 		$dropins[ $plugin_file ] = $plugin_data;
 	}
 	uksort( $dropins, 'strnatcasecmp' );
 * Returns drop-ins that WordPress uses.
 *
 * Includes Multisite drop-ins only when is_multisite()
 *
 * @since 3.0.0
-* @return array Key is file name. The value is an array, with the first value the
+* @return array[] Key is file name. The value is an array, with the first value the
 *  purpose of the drop-in and the second value the name of the constant that must be
 *  true for the drop-in to be used, or true if no constant is required.
 */
 function _get_dropins() {
 	$dropins = array(
-		'advanced-cache.php'      => array( __( 'Advanced caching plugin.' ), 'WP_CACHE' ), // WP_CACHE
+		'advanced-cache.php'      => array( __( 'Advanced caching plugin.' ), 'WP_CACHE' ),  // WP_CACHE
-		'db.php'                  => array( __( 'Custom database class.' ), true ), // auto on load
+		'db.php'                  => array( __( 'Custom database class.' ), true ),          // Auto on load.
-		'db-error.php'            => array( __( 'Custom database error message.' ), true ), // auto on error
+		'db-error.php'            => array( __( 'Custom database error message.' ), true ),  // Auto on error.
-		'install.php'             => array( __( 'Custom installation script.' ), true ), // auto on installation
+		'install.php'             => array( __( 'Custom installation script.' ), true ),     // Auto on installation.
-		'maintenance.php'         => array( __( 'Custom maintenance message.' ), true ), // auto on maintenance
+		'maintenance.php'         => array( __( 'Custom maintenance message.' ), true ),     // Auto on maintenance.
-		'object-cache.php'        => array( __( 'External object cache.' ), true ), // auto on load
+		'object-cache.php'        => array( __( 'External object cache.' ), true ),          // Auto on load.
-		'php-error.php'           => array( __( 'Custom PHP error message.' ), true ), // auto on error
+		'php-error.php'           => array( __( 'Custom PHP error message.' ), true ),       // Auto on error.
-		'fatal-error-handler.php' => array( __( 'Custom PHP fatal error handler.' ), true ), // auto on error
+		'fatal-error-handler.php' => array( __( 'Custom PHP fatal error handler.' ), true ), // Auto on error.
 	);
 	if ( is_multisite() ) {
 		$dropins['sunrise.php']        = array( __( 'Executed before Multisite is loaded.' ), 'SUNRISE' ); // SUNRISE
-		$dropins['blog-deleted.php']   = array( __( 'Custom site deleted message.' ), true ); // auto on deleted blog
+		$dropins['blog-deleted.php']   = array( __( 'Custom site deleted message.' ), true );   // Auto on deleted blog.
-		$dropins['blog-inactive.php']  = array( __( 'Custom site inactive message.' ), true ); // auto on inactive blog
+		$dropins['blog-inactive.php']  = array( __( 'Custom site inactive message.' ), true );  // Auto on inactive blog.
-		$dropins['blog-suspended.php'] = array( __( 'Custom site suspended message.' ), true ); // auto on archived or spammed blog
+		$dropins['blog-suspended.php'] = array( __( 'Custom site suspended message.' ), true ); // Auto on archived or spammed blog.
 	}
 	return $dropins;
 }
 *
 * @param string $plugin Path to the plugin file relative to the plugins directory.
 * @return bool True, if in the active plugins list. False, not in the list.
 */
 function is_plugin_active( $plugin ) {
-	return in_array( $plugin, (array) get_option( 'active_plugins', array() ) ) || is_plugin_active_for_network( $plugin );
+	return in_array( $plugin, (array) get_option( 'active_plugins', array() ), true ) || is_plugin_active_for_network( $plugin );
 }
 /**
 * Determines whether the plugin is inactive.
 *
 * 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 3.1.0
+*
 * @see is_plugin_active()
 *
 * @param string $plugin Path to the plugin file relative to the plugins directory.
 * @return bool True if inactive. False if active.
 */
 * @param string $plugin       Path to the plugin file relative to the plugins directory.
 * @param string $redirect     Optional. URL to redirect to.
 * @param bool   $network_wide Optional. Whether to enable the plugin for all sites in the network
 *                             or just the current site. Multisite only. Default false.
 * @param bool   $silent       Optional. Whether to prevent calling activation hooks. Default false.
-* @return WP_Error|null WP_Error on invalid file or null on success.
+* @return null|WP_Error Null on success, WP_Error on invalid file.
 */
 function activate_plugin( $plugin, $redirect = '', $network_wide = false, $silent = false ) {
 	$plugin = plugin_basename( trim( $plugin ) );
 	if ( is_multisite() && ( $network_wide || is_network_only_plugin( $plugin ) ) ) {
 	$requirements = validate_plugin_requirements( $plugin );
 	if ( is_wp_error( $requirements ) ) {
 		return $requirements;
 	}
-	if ( ( $network_wide && ! isset( $current[ $plugin ] ) ) || ( ! $network_wide && ! in_array( $plugin, $current ) ) ) {
+	if ( ( $network_wide && ! isset( $current[ $plugin ] ) ) || ( ! $network_wide && ! in_array( $plugin, $current, true ) ) ) {
 		if ( ! empty( $redirect ) ) {
-			wp_redirect( add_query_arg( '_error_nonce', wp_create_nonce( 'plugin-activation-error_' . $plugin ), $redirect ) ); // we'll override this later if the plugin can be included without fatal error
+			// We'll override this later if the plugin can be included without fatal error.
+			wp_redirect( add_query_arg( '_error_nonce', wp_create_nonce( 'plugin-activation-error_' . $plugin ), $redirect ) );
 		}
 		ob_start();
+		if ( ! defined( 'WP_SANDBOX_SCRAPING' ) ) {
+			define( 'WP_SANDBOX_SCRAPING', true );
+		}
 		wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $plugin );
 		$_wp_plugin_file = $plugin;
-		if ( ! defined( 'WP_SANDBOX_SCRAPING' ) ) {
+		include_once WP_PLUGIN_DIR . '/' . $plugin;
-			define( 'WP_SANDBOX_SCRAPING', true );
-		}
-		include_once( WP_PLUGIN_DIR . '/' . $plugin );
 		$plugin = $_wp_plugin_file; // Avoid stomping of the $plugin variable in a plugin.
 		if ( ! $silent ) {
 			/**
 			 * Fires before a plugin is activated.
 			 *
 			 * @since 2.9.0
 			 *
 			 * @param string $plugin       Path to the plugin file relative to the plugins directory.
 			 * @param bool   $network_wide Whether to enable the plugin for all sites in the network
-			 *                             or just the current site. Multisite only. Default is false.
+			 *                             or just the current site. Multisite only. Default false.
 			 */
 			do_action( 'activate_plugin', $plugin, $network_wide );
 			/**
 			 * Fires as a specific plugin is being activated.
 			 * If a plugin is silently activated (such as during an update), this hook does not fire.
 			 *
 			 * @since 2.0.0
 			 *
 			 * @param bool $network_wide Whether to enable the plugin for all sites in the network
-			 *                           or just the current site. Multisite only. Default is false.
+			 *                           or just the current site. Multisite only. Default false.
 			 */
 			do_action( "activate_{$plugin}", $network_wide );
 		}
 		if ( $network_wide ) {
 			 *
 			 * @since 2.9.0
 			 *
 			 * @param string $plugin       Path to the plugin file relative to the plugins directory.
 			 * @param bool   $network_wide Whether to enable the plugin for all sites in the network
-			 *                             or just the current site. Multisite only. Default is false.
+			 *                             or just the current site. Multisite only. Default false.
 			 */
 			do_action( 'activated_plugin', $plugin, $network_wide );
 		}
 		if ( ob_get_length() > 0 ) {
 * The deactivation hook is disabled by the plugin upgrader by using the $silent
 * parameter.
 *
 * @since 2.5.0
 *
-* @param string|array $plugins Single plugin or list of plugins to deactivate.
+* @param string|string[] $plugins      Single plugin or list of plugins to deactivate.
-* @param bool $silent Prevent calling deactivation hooks. Default is false.
+* @param bool            $silent       Prevent calling deactivation hooks. Default false.
-* @param mixed $network_wide Whether to deactivate the plugin for all sites in the network.
+* @param bool|null       $network_wide Whether to deactivate the plugin for all sites in the network.
-*  A value of null (the default) will deactivate plugins for both the site and the network.
+*                                      A value of null will deactivate plugins for both the network
+*                                      and the current site. Multisite only. Default null.
 */
 function deactivate_plugins( $plugins, $silent = false, $network_wide = null ) {
 	if ( is_multisite() ) {
 		$network_current = get_site_option( 'active_sitewide_plugins', array() );
 	}
-	$current = get_option( 'active_plugins', array() );
+	$current    = get_option( 'active_plugins', array() );
-	$do_blog = $do_network = false;
+	$do_blog    = false;
+	$do_network = false;
 	foreach ( (array) $plugins as $plugin ) {
 		$plugin = plugin_basename( trim( $plugin ) );
 		if ( ! is_plugin_active( $plugin ) ) {
 			continue;
 			 *
 			 * @since 2.9.0
 			 *
 			 * @param string $plugin               Path to the plugin file relative to the plugins directory.
 			 * @param bool   $network_deactivating Whether the plugin is deactivated for all sites in the network
-			 *                                     or just the current site. Multisite only. Default is false.
+			 *                                     or just the current site. Multisite only. Default false.
 			 */
 			do_action( 'deactivate_plugin', $plugin, $network_deactivating );
 		}
 		if ( false !== $network_wide ) {
 				continue;
 			}
 		}
 		if ( true !== $network_wide ) {
-			$key = array_search( $plugin, $current );
+			$key = array_search( $plugin, $current, true );
 			if ( false !== $key ) {
 				$do_blog = true;
 				unset( $current[ $key ] );
 			}
 		}
 			 * If a plugin is silently deactivated (such as during an update), this hook does not fire.
 			 *
 			 * @since 2.0.0
 			 *
 			 * @param bool $network_deactivating Whether the plugin is deactivated for all sites in the network
-			 *                                   or just the current site. Multisite only. Default is false.
+			 *                                   or just the current site. Multisite only. Default false.
 			 */
 			do_action( "deactivate_{$plugin}", $network_deactivating );
 			/**
 			 * Fires after a plugin is deactivated.
 			 * this hook does not fire.
 			 *
 			 * @since 2.9.0
 			 *
 			 * @param string $plugin               Path to the plugin file relative to the plugins directory.
-			 * @param bool   $network_deactivating Whether the plugin is deactivated for all sites in the network.
+			 * @param bool   $network_deactivating Whether the plugin is deactivated for all sites in the network
 			 *                                     or just the current site. Multisite only. Default false.
 			 */
 			do_action( 'deactivated_plugin', $plugin, $network_deactivating );
 		}
 	}
 /**
 * Activate multiple plugins.
 *
 * When WP_Error is returned, it does not mean that one of the plugins had
-* errors. It means that one or more of the plugins file path was invalid.
+* errors. It means that one or more of the plugin file paths were invalid.
 *
 * The execution will be halted as soon as one of the plugins has an error.
 *
 * @since 2.6.0
 *
-* @param string|array $plugins Single plugin or list of plugins to activate.
+* @param string|string[] $plugins      Single plugin or list of plugins to activate.
-* @param string $redirect Redirect to page after successful activation.
+* @param string          $redirect     Redirect to page after successful activation.
-* @param bool $network_wide Whether to enable the plugin for all sites in the network.
+* @param bool            $network_wide Whether to enable the plugin for all sites in the network.
-* @param bool $silent Prevent calling activation hooks. Default is false.
+*                                      Default false.
+* @param bool            $silent       Prevent calling activation hooks. Default false.
 * @return bool|WP_Error True when finished or WP_Error if there were errors during a plugin activation.
 */
 function activate_plugins( $plugins, $redirect = '', $network_wide = false, $silent = false ) {
 	if ( ! is_array( $plugins ) ) {
 		$plugins = array( $plugins );
 	$credentials = request_filesystem_credentials( $url );
 	$data        = ob_get_clean();
 	if ( false === $credentials ) {
 		if ( ! empty( $data ) ) {
-			include_once( ABSPATH . 'wp-admin/admin-header.php' );
+			require_once ABSPATH . 'wp-admin/admin-header.php';
 			echo $data;
-			include( ABSPATH . 'wp-admin/admin-footer.php' );
+			require_once ABSPATH . 'wp-admin/admin-footer.php';
 			exit;
 		}
 		return;
 	}
 	if ( ! WP_Filesystem( $credentials ) ) {
 		ob_start();
-		request_filesystem_credentials( $url, '', true ); // Failed to connect, Error and request again.
+		// Failed to connect. Error and request again.
+		request_filesystem_credentials( $url, '', true );
 		$data = ob_get_clean();
 		if ( ! empty( $data ) ) {
-			include_once( ABSPATH . 'wp-admin/admin-header.php' );
+			require_once ABSPATH . 'wp-admin/admin-header.php';
 			echo $data;
-			include( ABSPATH . 'wp-admin/admin-footer.php' );
+			require_once ABSPATH . 'wp-admin/admin-footer.php';
 			exit;
 		}
 		return;
 	}
 		do_action( 'delete_plugin', $plugin_file );
 		$this_plugin_dir = trailingslashit( dirname( $plugins_dir . $plugin_file ) );
 		// If plugin is in its own directory, recursively delete the directory.
-		if ( strpos( $plugin_file, '/' ) && $this_plugin_dir != $plugins_dir ) { //base check on if plugin includes directory separator AND that it's not the root plugin folder
+		// Base check on if plugin includes directory separator AND that it's not the root plugin folder.
+		if ( strpos( $plugin_file, '/' ) && $this_plugin_dir != $plugins_dir ) {
 			$deleted = $wp_filesystem->delete( $this_plugin_dir, true );
 		} else {
 			$deleted = $wp_filesystem->delete( $plugins_dir . $plugin_file );
 		}
 			}
 		}
 	}
 	// Remove deleted plugins from the plugin updates list.
-	if ( $current = get_site_transient( 'update_plugins' ) ) {
+	$current = get_site_transient( 'update_plugins' );
+	if ( $current ) {
 		// Don't remove the plugins that weren't deleted.
 		$deleted = array_diff( $plugins, $errors );
 		foreach ( $deleted as $plugin_file ) {
 			unset( $current->response[ $plugin_file ] );
 		set_site_transient( 'update_plugins', $current );
 	}
 	if ( ! empty( $errors ) ) {
 		if ( 1 === count( $errors ) ) {
-			/* translators: %s: plugin filename */
+			/* translators: %s: Plugin filename. */
 			$message = __( 'Could not fully remove the plugin %s.' );
 		} else {
-			/* translators: %s: comma-separated list of plugin filenames */
+			/* translators: %s: Comma-separated list of plugin filenames. */
 			$message = __( 'Could not fully remove the plugins %s.' );
 		}
 		return new WP_Error( 'could_not_remove_plugin', sprintf( $message, implode( ', ', $errors ) ) );
 	}
 *
 * Validate all active plugins, deactivates invalid and
 * returns an array of deactivated ones.
 *
 * @since 2.5.0
-* @return array invalid plugins, plugin as key, error as value
+* @return WP_Error[] Array of plugin errors keyed by plugin file name.
 */
 function validate_active_plugins() {
 	$plugins = get_option( 'active_plugins', array() );
 	// Validate vartype: array.
 	if ( ! is_array( $plugins ) ) {
 * Checks that the main plugin file exists and is a valid plugin. See validate_file().
 *
 * @since 2.5.0
 *
 * @param string $plugin Path to the plugin file relative to the plugins directory.
-* @return WP_Error|int 0 on success, WP_Error on failure.
+* @return int|WP_Error 0 on success, WP_Error on failure.
 */
 function validate_plugin( $plugin ) {
 	if ( validate_file( $plugin ) ) {
 		return new WP_Error( 'plugin_invalid', __( 'Invalid plugin path.' ) );
 	}
 	}
 	return 0;
 }
 /**
-* Validate the plugin requirements for WP version and PHP version.
+* Validates the plugin requirements for WordPress version and PHP version.
+*
+* Uses the information from `Requires at least` and `Requires PHP` headers
+* defined in the plugin's main PHP file.
+*
+* If the headers are not present in the plugin's main PHP file,
+* `readme.txt` is also checked as a fallback.
 *
 * @since 5.2.0
+* @since 5.3.0 Added support for reading the headers from the plugin's
+*              main PHP file, with `readme.txt` as a fallback.
 *
 * @param string $plugin Path to the plugin file relative to the plugins directory.
 * @return true|WP_Error True if requirements are met, WP_Error on failure.
 */
 function validate_plugin_requirements( $plugin ) {
+	$plugin_headers = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin );
+	$requirements = array(
+		'requires'     => ! empty( $plugin_headers['RequiresWP'] ) ? $plugin_headers['RequiresWP'] : '',
+		'requires_php' => ! empty( $plugin_headers['RequiresPHP'] ) ? $plugin_headers['RequiresPHP'] : '',
+	);
 	$readme_file = WP_PLUGIN_DIR . '/' . dirname( $plugin ) . '/readme.txt';
 	if ( file_exists( $readme_file ) ) {
-		$plugin_data = get_file_data(
+		$readme_headers = get_file_data(
 			$readme_file,
 			array(
 				'requires'     => 'Requires at least',
 				'requires_php' => 'Requires PHP',
 			),
 			'plugin'
 		);
-	} else {
-		return true;
+		$requirements = array_merge( $readme_headers, $requirements );
 	}
-	$plugin_data['wp_compatible']  = is_wp_version_compatible( $plugin_data['requires'] );
+	$compatible_wp  = is_wp_version_compatible( $requirements['requires'] );
-	$plugin_data['php_compatible'] = is_php_version_compatible( $plugin_data['requires_php'] );
+	$compatible_php = is_php_version_compatible( $requirements['requires_php'] );
-	$plugin_data = array_merge( $plugin_data, get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin ) );
+	/* translators: %s: URL to Update PHP page. */
+	$php_update_message = '</p><p>' . sprintf(
-	if ( ! $plugin_data['wp_compatible'] && ! $plugin_data['php_compatible'] ) {
+		__( '<a href="%s">Learn more about updating PHP</a>.' ),
+		esc_url( wp_get_update_php_url() )
+	);
+	$annotation = wp_get_update_php_annotation();
+	if ( $annotation ) {
+		$php_update_message .= '</p><p><em>' . $annotation . '</em>';
+	}
+	if ( ! $compatible_wp && ! $compatible_php ) {
 		return new WP_Error(
 			'plugin_wp_php_incompatible',
-			sprintf(
+			'<p>' . sprintf(
-				/* translators: %s: plugin name */
+				/* translators: 1: Current WordPress version, 2: Current PHP version, 3: Plugin name, 4: Required WordPress version, 5: Required PHP version. */
-				__( '<strong>Error:</strong> Current WordPress and PHP versions do not meet minimum requirements for %s.' ),
+				_x( '<strong>Error:</strong> Current versions of WordPress (%1$s) and PHP (%2$s) do not meet minimum requirements for %3$s. The plugin requires WordPress %4$s and PHP %5$s.', 'plugin' ),
-				$plugin_data['Name']
+				get_bloginfo( 'version' ),
-			)
+				phpversion(),
+				$plugin_headers['Name'],
+				$requirements['requires'],
+				$requirements['requires_php']
+			) . $php_update_message . '</p>'
 		);
-	} elseif ( ! $plugin_data['php_compatible'] ) {
+	} elseif ( ! $compatible_php ) {
 		return new WP_Error(
 			'plugin_php_incompatible',
-			sprintf(
+			'<p>' . sprintf(
-				/* translators: %s: plugin name */
+				/* translators: 1: Current PHP version, 2: Plugin name, 3: Required PHP version. */
-				__( '<strong>Error:</strong> Current PHP version does not meet minimum requirements for %s.' ),
+				_x( '<strong>Error:</strong> Current PHP version (%1$s) does not meet minimum requirements for %2$s. The plugin requires PHP %3$s.', 'plugin' ),
-				$plugin_data['Name']
+				phpversion(),
-			)
+				$plugin_headers['Name'],
+				$requirements['requires_php']
+			) . $php_update_message . '</p>'
 		);
-	} elseif ( ! $plugin_data['wp_compatible'] ) {
+	} elseif ( ! $compatible_wp ) {
 		return new WP_Error(
 			'plugin_wp_incompatible',
-			sprintf(
+			'<p>' . sprintf(
-				/* translators: %s: plugin name */
+				/* translators: 1: Current WordPress version, 2: Plugin name, 3: Required WordPress version. */
-				__( '<strong>Error:</strong> Current WordPress version does not meet minimum requirements for %s.' ),
+				_x( '<strong>Error:</strong> Current WordPress version (%1$s) does not meet minimum requirements for %2$s. The plugin requires WordPress %3$s.', 'plugin' ),
-				$plugin_data['Name']
+				get_bloginfo( 'version' ),
-			)
+				$plugin_headers['Name'],
+				$requirements['requires']
+			) . '</p>'
 		);
 	}
 	return true;
 }
 			update_option( 'uninstall_plugins', $uninstallable_plugins );
 		}
 		unset( $uninstallable_plugins );
 		define( 'WP_UNINSTALL_PLUGIN', $file );
 		wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $file );
-		include( WP_PLUGIN_DIR . '/' . dirname( $file ) . '/uninstall.php' );
+		include_once WP_PLUGIN_DIR . '/' . dirname( $file ) . '/uninstall.php';
 		return true;
 	}
 	if ( isset( $uninstallable_plugins[ $file ] ) ) {
 		unset( $uninstallable_plugins[ $file ] );
 		update_option( 'uninstall_plugins', $uninstallable_plugins );
 		unset( $uninstallable_plugins );
 		wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $file );
-		include( WP_PLUGIN_DIR . '/' . $file );
+		include_once WP_PLUGIN_DIR . '/' . $file;
 		add_action( "uninstall_{$file}", $callable );
 		/**
 		 * Fires in uninstall_plugin() once the plugin has been uninstalled.
 		do_action( "uninstall_{$file}" );
 	}
 }
 //
-// Menu
+// Menu.
 //
 /**
 * Add a top-level menu page.
 *
 *                             * Pass a base64-encoded SVG using a data URI, which will be colored to match
 *                               the color scheme. This should begin with 'data:image/svg+xml;base64,'.
 *                             * Pass the name of a Dashicons helper class to use a font icon,
 *                               e.g. 'dashicons-chart-pie'.
 *                             * Pass 'none' to leave div.wp-menu-image empty so an icon can be added via CSS.
-* @param int      $position   The position in the menu order this one should appear.
+* @param int      $position   The position in the menu order this item should appear.
 * @return string The resulting page's hook_suffix.
 */
 function add_menu_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $icon_url = '', $position = null ) {
 	global $menu, $admin_page_hooks, $_registered_pages, $_parent_pages;
 		$menu[ $position ] = $new_menu;
 	}
 	$_registered_pages[ $hookname ] = true;
-	// No parent as top level
+	// No parent as top level.
 	$_parent_pages[ $menu_slug ] = false;
 	return $hookname;
 }
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
 * @since 1.5.0
+* @since 5.3.0 Added the `$position` parameter.
 *
 * @global array $submenu
 * @global array $menu
 * @global array $_wp_real_parent_file
 * @global bool  $_wp_submenu_nopriv
 * @param string   $capability  The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug   The slug name to refer to this menu by. Should be unique for this menu
 *                              and only include lowercase alphanumeric, dashes, and underscores characters
 *                              to be compatible with sanitize_key().
 * @param callable $function    The function to be called to output the content for this page.
-* @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
+* @param int      $position    The position in the menu order this item should appear.
-*/
+* @return string|false The resulting page's hook_suffix, or false if the user does not have the capability required.
-function add_submenu_page( $parent_slug, $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
+*/
+function add_submenu_page( $parent_slug, $page_title, $menu_title, $capability, $menu_slug, $function = '', $position = null ) {
 	global $submenu, $menu, $_wp_real_parent_file, $_wp_submenu_nopriv,
 		$_registered_pages, $_parent_pages;
 	$menu_slug   = plugin_basename( $menu_slug );
 	$parent_slug = plugin_basename( $parent_slug );
 				$submenu[ $parent_slug ][] = array_slice( $parent_menu, 0, 4 );
 			}
 		}
 	}
-	$submenu[ $parent_slug ][] = array( $menu_title, $capability, $menu_slug, $page_title );
+	$new_sub_menu = array( $menu_title, $capability, $menu_slug, $page_title );
+	if ( ! is_int( $position ) ) {
+		if ( null !== $position ) {
+			_doing_it_wrong(
+				__FUNCTION__,
+				sprintf(
+					/* translators: %s: add_submenu_page() */
+					__( 'The seventh parameter passed to %s should be an integer representing menu position.' ),
+					'<code>add_submenu_page()</code>'
+				),
+				'5.3.0'
+			);
+		}
+		$submenu[ $parent_slug ][] = $new_sub_menu;
+	} else {
+		// Append the submenu if the parent item is not present in the submenu,
+		// or if position is equal or higher than the number of items in the array.
+		if ( ! isset( $submenu[ $parent_slug ] ) || $position >= count( $submenu[ $parent_slug ] ) ) {
+			$submenu[ $parent_slug ][] = $new_sub_menu;
+		} else {
+			// Test for a negative position.
+			$position = max( $position, 0 );
+			if ( 0 === $position ) {
+				// For negative or `0` positions, prepend the submenu.
+				array_unshift( $submenu[ $parent_slug ], $new_sub_menu );
+			} else {
+				// Grab all of the items before the insertion point.
+				$before_items = array_slice( $submenu[ $parent_slug ], 0, $position, true );
+				// Grab all of the items after the insertion point.
+				$after_items = array_slice( $submenu[ $parent_slug ], $position, null, true );
+				// Add the new item.
+				$before_items[] = $new_sub_menu;
+				// Merge the items.
+				$submenu[ $parent_slug ] = array_merge( $before_items, $after_items );
+			}
+		}
+	}
+	// Sort the parent array.
+	ksort( $submenu[ $parent_slug ] );
 	$hookname = get_plugin_page_hookname( $menu_slug, $parent_slug );
 	if ( ! empty( $function ) && ! empty( $hookname ) ) {
 		add_action( $hookname, $function );
 	}
 	/*
 	 * Backward-compatibility for plugins using add_management_page().
 	 * See wp-admin/admin.php for redirect from edit.php to tools.php.
 	 */
-	if ( 'tools.php' == $parent_slug ) {
+	if ( 'tools.php' === $parent_slug ) {
 		$_registered_pages[ get_plugin_page_hookname( $menu_slug, 'edit.php' ) ] = true;
 	}
 	// No parent as top level.
 	$_parent_pages[ $menu_slug ] = $parent_slug;
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
 * @since 1.5.0
+* @since 5.3.0 Added the `$position` parameter.
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
-* @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
+* @param int      $position   The position in the menu order this item should appear.
-*/
+* @return string|false The resulting page's hook_suffix, or false if the user does not have the capability required.
-function add_management_page( $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
+*/
-	return add_submenu_page( 'tools.php', $page_title, $menu_title, $capability, $menu_slug, $function );
+function add_management_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $position = null ) {
+	return add_submenu_page( 'tools.php', $page_title, $menu_title, $capability, $menu_slug, $function, $position );
 }
 /**
 * Add submenu page to the Settings main menu.
 *
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
 * @since 1.5.0
+* @since 5.3.0 Added the `$position` parameter.
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
-* @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
+* @param int      $position   The position in the menu order this item should appear.
-*/
+* @return string|false The resulting page's hook_suffix, or false if the user does not have the capability required.
-function add_options_page( $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
+*/
-	return add_submenu_page( 'options-general.php', $page_title, $menu_title, $capability, $menu_slug, $function );
+function add_options_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $position = null ) {
+	return add_submenu_page( 'options-general.php', $page_title, $menu_title, $capability, $menu_slug, $function, $position );
 }
 /**
 * Add submenu page to the Appearance main menu.
 *
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
 * @since 2.0.0
+* @since 5.3.0 Added the `$position` parameter.
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
-* @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
+* @param int      $position   The position in the menu order this item should appear.
-*/
+* @return string|false The resulting page's hook_suffix, or false if the user does not have the capability required.
-function add_theme_page( $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
+*/
-	return add_submenu_page( 'themes.php', $page_title, $menu_title, $capability, $menu_slug, $function );
+function add_theme_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $position = null ) {
+	return add_submenu_page( 'themes.php', $page_title, $menu_title, $capability, $menu_slug, $function, $position );
 }
 /**
 * Add submenu page to the Plugins main menu.
 *
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
 * @since 3.0.0
+* @since 5.3.0 Added the `$position` parameter.
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
-* @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
+* @param int      $position   The position in the menu order this item should appear.
-*/
+* @return string|false The resulting page's hook_suffix, or false if the user does not have the capability required.
-function add_plugins_page( $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
+*/
-	return add_submenu_page( 'plugins.php', $page_title, $menu_title, $capability, $menu_slug, $function );
+function add_plugins_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $position = null ) {
+	return add_submenu_page( 'plugins.php', $page_title, $menu_title, $capability, $menu_slug, $function, $position );
 }
 /**
 * Add submenu page to the Users/Profile main menu.
 *
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
 * @since 2.1.3
+* @since 5.3.0 Added the `$position` parameter.
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
-* @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
+* @param int      $position   The position in the menu order this item should appear.
-*/
+* @return string|false The resulting page's hook_suffix, or false if the user does not have the capability required.
-function add_users_page( $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
+*/
+function add_users_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $position = null ) {
 	if ( current_user_can( 'edit_users' ) ) {
 		$parent = 'users.php';
 	} else {
 		$parent = 'profile.php';
 	}
-	return add_submenu_page( $parent, $page_title, $menu_title, $capability, $menu_slug, $function );
+	return add_submenu_page( $parent, $page_title, $menu_title, $capability, $menu_slug, $function, $position );
 }
 /**
 * Add submenu page to the Dashboard main menu.
 *
 * This function takes a capability which will be used to determine whether
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
 * @since 2.7.0
+* @since 5.3.0 Added the `$position` parameter.
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
-* @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
+* @param int      $position   The position in the menu order this item should appear.
-*/
+* @return string|false The resulting page's hook_suffix, or false if the user does not have the capability required.
-function add_dashboard_page( $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
+*/
-	return add_submenu_page( 'index.php', $page_title, $menu_title, $capability, $menu_slug, $function );
+function add_dashboard_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $position = null ) {
+	return add_submenu_page( 'index.php', $page_title, $menu_title, $capability, $menu_slug, $function, $position );
 }
 /**
 * Add submenu page to the Posts main menu.
 *
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
 * @since 2.7.0
+* @since 5.3.0 Added the `$position` parameter.
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
-* @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
+* @param int      $position   The position in the menu order this item should appear.
-*/
+* @return string|false The resulting page's hook_suffix, or false if the user does not have the capability required.
-function add_posts_page( $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
+*/
-	return add_submenu_page( 'edit.php', $page_title, $menu_title, $capability, $menu_slug, $function );
+function add_posts_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $position = null ) {
+	return add_submenu_page( 'edit.php', $page_title, $menu_title, $capability, $menu_slug, $function, $position );
 }
 /**
 * Add submenu page to the Media main menu.
 *
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
 * @since 2.7.0
+* @since 5.3.0 Added the `$position` parameter.
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
-* @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
+* @param int      $position   The position in the menu order this item should appear.
-*/
+* @return string|false The resulting page's hook_suffix, or false if the user does not have the capability required.
-function add_media_page( $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
+*/
-	return add_submenu_page( 'upload.php', $page_title, $menu_title, $capability, $menu_slug, $function );
+function add_media_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $position = null ) {
+	return add_submenu_page( 'upload.php', $page_title, $menu_title, $capability, $menu_slug, $function, $position );
 }
 /**
 * Add submenu page to the Links main menu.
 *
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
 * @since 2.7.0
+* @since 5.3.0 Added the `$position` parameter.
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
-* @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
+* @param int      $position   The position in the menu order this item should appear.
-*/
+* @return string|false The resulting page's hook_suffix, or false if the user does not have the capability required.
-function add_links_page( $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
+*/
-	return add_submenu_page( 'link-manager.php', $page_title, $menu_title, $capability, $menu_slug, $function );
+function add_links_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $position = null ) {
+	return add_submenu_page( 'link-manager.php', $page_title, $menu_title, $capability, $menu_slug, $function, $position );
 }
 /**
 * Add submenu page to the Pages main menu.
 *
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
 * @since 2.7.0
+* @since 5.3.0 Added the `$position` parameter.
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
-* @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
+* @param int      $position   The position in the menu order this item should appear.
-*/
+* @return string|false The resulting page's hook_suffix, or false if the user does not have the capability required.
-function add_pages_page( $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
+*/
-	return add_submenu_page( 'edit.php?post_type=page', $page_title, $menu_title, $capability, $menu_slug, $function );
+function add_pages_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $position = null ) {
+	return add_submenu_page( 'edit.php?post_type=page', $page_title, $menu_title, $capability, $menu_slug, $function, $position );
 }
 /**
 * Add submenu page to the Comments main menu.
 *
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
 * @since 2.7.0
+* @since 5.3.0 Added the `$position` parameter.
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
-* @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
+* @param int      $position   The position in the menu order this item should appear.
-*/
+* @return string|false The resulting page's hook_suffix, or false if the user does not have the capability required.
-function add_comments_page( $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
+*/
-	return add_submenu_page( 'edit-comments.php', $page_title, $menu_title, $capability, $menu_slug, $function );
+function add_comments_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $position = null ) {
+	return add_submenu_page( 'edit-comments.php', $page_title, $menu_title, $capability, $menu_slug, $function, $position );
 }
 /**
 * Remove a top-level admin menu.
 *
 	return false;
 }
 /**
-* Get the url to access a particular menu page based on the slug it was registered with.
+* Get the URL to access a particular menu page based on the slug it was registered with.
 *
-* If the slug hasn't been registered properly no url will be returned
+* If the slug hasn't been registered properly, no URL will be returned.
 *
 * @since 3.0.0
 *
 * @global array $_parent_pages
 *
-* @param string $menu_slug The slug name to refer to this menu by (should be unique for this menu)
+* @param string $menu_slug The slug name to refer to this menu by (should be unique for this menu).
-* @param bool $echo Whether or not to echo the url - default is true
+* @param bool   $echo      Whether or not to echo the URL. Default true.
-* @return string the url
+* @return string The menu page URL.
 */
 function menu_page_url( $menu_slug, $echo = true ) {
 	global $_parent_pages;
 	if ( isset( $_parent_pages[ $menu_slug ] ) ) {
 	return $url;
 }
 //
-// Pluggable Menu Support -- Private
+// Pluggable Menu Support -- Private.
 //
 /**
+* Gets the parent file of the current admin page.
+*
+* @since 1.5.0
+*
 * @global string $parent_file
-* @global array $menu
+* @global array  $menu
-* @global array $submenu
+* @global array  $submenu
 * @global string $pagenow
 * @global string $typenow
 * @global string $plugin_page
-* @global array $_wp_real_parent_file
+* @global array  $_wp_real_parent_file
-* @global array $_wp_menu_nopriv
+* @global array  $_wp_menu_nopriv
-* @global array $_wp_submenu_nopriv
+* @global array  $_wp_submenu_nopriv
 *
-* @return string
+* @param string $parent The slug name for the parent menu (or the file name of a standard
+*                       WordPress admin page). Default empty string.
+* @return string The parent file of the current admin page.
 */
 function get_admin_page_parent( $parent = '' ) {
 	global $parent_file, $menu, $submenu, $pagenow, $typenow,
 		$plugin_page, $_wp_real_parent_file, $_wp_menu_nopriv, $_wp_submenu_nopriv;
-	if ( ! empty( $parent ) && 'admin.php' != $parent ) {
+	if ( ! empty( $parent ) && 'admin.php' !== $parent ) {
 		if ( isset( $_wp_real_parent_file[ $parent ] ) ) {
 			$parent = $_wp_real_parent_file[ $parent ];
 		}
 		return $parent;
 	}
-	if ( $pagenow == 'admin.php' && isset( $plugin_page ) ) {
+	if ( 'admin.php' === $pagenow && isset( $plugin_page ) ) {
 		foreach ( (array) $menu as $parent_menu ) {
 			if ( $parent_menu[2] == $plugin_page ) {
 				$parent_file = $plugin_page;
 				if ( isset( $_wp_real_parent_file[ $parent_file ] ) ) {
 					$parent_file = $_wp_real_parent_file[ $parent_file ];
 	foreach ( array_keys( (array) $submenu ) as $parent ) {
 		foreach ( $submenu[ $parent ] as $submenu_array ) {
 			if ( isset( $_wp_real_parent_file[ $parent ] ) ) {
 				$parent = $_wp_real_parent_file[ $parent ];
 			}
-			if ( ! empty( $typenow ) && ( $submenu_array[2] == "$pagenow?post_type=$typenow" ) ) {
+			if ( ! empty( $typenow ) && ( "$pagenow?post_type=$typenow" === $submenu_array[2] ) ) {
 				$parent_file = $parent;
 				return $parent;
 			} elseif ( $submenu_array[2] == $pagenow && empty( $typenow ) && ( empty( $parent_file ) || false === strpos( $parent_file, '?' ) ) ) {
 				$parent_file = $parent;
 				return $parent;
 	}
 	return '';
 }
 /**
+* Gets the title of the current admin page.
+*
+* @since 1.5.0
+*
 * @global string $title
 * @global array $menu
 * @global array $submenu
 * @global string $pagenow
 * @global string $plugin_page
 * @global string $typenow
 *
-* @return string
+* @return string The title of the current admin page.
 */
 function get_admin_page_title() {
 	global $title, $menu, $submenu, $pagenow, $plugin_page, $typenow;
 	if ( ! empty( $title ) ) {
 		return $title;
 	}
 	$hook = get_plugin_page_hook( $plugin_page, $pagenow );
-	$parent = $parent1 = get_admin_page_parent();
+	$parent  = get_admin_page_parent();
+	$parent1 = $parent;
 	if ( empty( $parent ) ) {
 		foreach ( (array) $menu as $menu_array ) {
 			if ( isset( $menu_array[3] ) ) {
 				if ( $menu_array[2] == $pagenow ) {
 					$title = $menu_array[3];
 					return $menu_array[3];
-				} elseif ( isset( $plugin_page ) && ( $plugin_page == $menu_array[2] ) && ( $hook == $menu_array[3] ) ) {
+				} elseif ( isset( $plugin_page ) && ( $plugin_page == $menu_array[2] ) && ( $hook == $menu_array[5] ) ) {
 					$title = $menu_array[3];
 					return $menu_array[3];
 				}
 			} else {
 				$title = $menu_array[0];
 					( $plugin_page == $submenu_array[2] ) &&
 					(
 						( $parent == $pagenow ) ||
 						( $parent == $plugin_page ) ||
 						( $plugin_page == $hook ) ||
-						( $pagenow == 'admin.php' && $parent1 != $submenu_array[2] ) ||
+						( 'admin.php' === $pagenow && $parent1 != $submenu_array[2] ) ||
 						( ! empty( $typenow ) && $parent == $pagenow . '?post_type=' . $typenow )
 					)
 					) {
 						$title = $submenu_array[3];
 						return $submenu_array[3];
 				}
-				if ( $submenu_array[2] != $pagenow || isset( $_GET['page'] ) ) { // not the current page
+				if ( $submenu_array[2] != $pagenow || isset( $_GET['page'] ) ) { // Not the current page.
 					continue;
 				}
 				if ( isset( $submenu_array[3] ) ) {
 					$title = $submenu_array[3];
 		}
 		if ( empty( $title ) ) {
 			foreach ( $menu as $menu_array ) {
 				if ( isset( $plugin_page ) &&
 					( $plugin_page == $menu_array[2] ) &&
-					( $pagenow == 'admin.php' ) &&
+					( 'admin.php' === $pagenow ) &&
 					( $parent1 == $menu_array[2] ) ) {
 						$title = $menu_array[3];
 						return $menu_array[3];
 				}
 			}
 	return $title;
 }
 /**
-* @since 2.3.0
+* Gets the hook attached to the administrative page of a plugin.
+*
+* @since 1.5.0
 *
 * @param string $plugin_page The slug name of the plugin page.
 * @param string $parent_page The slug name for the parent menu (or the file name of a standard
 *                            WordPress admin page).
 * @return string|null Hook attached to the plugin page, null otherwise.
 		return null;
 	}
 }
 /**
+* Gets the hook name for the administrative page of a plugin.
+*
+* @since 1.5.0
+*
 * @global array $admin_page_hooks
 *
 * @param string $plugin_page The slug name of the plugin page.
 * @param string $parent_page The slug name for the parent menu (or the file name of a standard
 *                            WordPress admin page).
 	global $admin_page_hooks;
 	$parent = get_admin_page_parent( $parent_page );
 	$page_type = 'admin';
-	if ( empty( $parent_page ) || 'admin.php' == $parent_page || isset( $admin_page_hooks[ $plugin_page ] ) ) {
+	if ( empty( $parent_page ) || 'admin.php' === $parent_page || isset( $admin_page_hooks[ $plugin_page ] ) ) {
 		if ( isset( $admin_page_hooks[ $plugin_page ] ) ) {
 			$page_type = 'toplevel';
 		} elseif ( isset( $admin_page_hooks[ $parent ] ) ) {
 			$page_type = $admin_page_hooks[ $parent ];
 		}
 	return $page_type . '_page_' . $plugin_name;
 }
 /**
+* Determines whether the current user can access the current admin page.
+*
+* @since 1.5.0
+*
 * @global string $pagenow
-* @global array $menu
+* @global array  $menu
-* @global array $submenu
+* @global array  $submenu
-* @global array $_wp_menu_nopriv
+* @global array  $_wp_menu_nopriv
-* @global array $_wp_submenu_nopriv
+* @global array  $_wp_submenu_nopriv
 * @global string $plugin_page
-* @global array $_registered_pages
+* @global array  $_registered_pages
 *
-* @return bool Whether the current user can access the current admin page.
+* @return bool True if the current user can access the admin page, false otherwise.
 */
 function user_can_access_admin_page() {
 	global $pagenow, $menu, $submenu, $_wp_menu_nopriv, $_wp_submenu_nopriv,
 		$plugin_page, $_registered_pages;
 	}
 	return true;
 }
-/* Whitelist functions */
+/* Allowed list functions */
 /**
-* Refreshes the value of the options whitelist available via the 'whitelist_options' hook.
+* Refreshes the value of the allowed options list available via the 'allowed_options' hook.
 *
-* See the {@see 'whitelist_options'} filter.
+* See the {@see 'allowed_options'} filter.
 *
 * @since 2.7.0
-*
+* @since 5.5.0 `$new_whitelist_options` was renamed to `$new_allowed_options`.
-* @global array $new_whitelist_options
+*              Please consider writing more inclusive code.
+*
+* @global array $new_allowed_options
 *
 * @param array $options
 * @return array
 */
 function option_update_filter( $options ) {
-	global $new_whitelist_options;
+	global $new_allowed_options;
-	if ( is_array( $new_whitelist_options ) ) {
+	if ( is_array( $new_allowed_options ) ) {
-		$options = add_option_whitelist( $new_whitelist_options, $options );
+		$options = add_allowed_options( $new_allowed_options, $options );
 	}
 	return $options;
 }
 /**
-* Adds an array of options to the options whitelist.
+* Adds an array of options to the list of allowed options.
 *
 * @since 2.7.0
 *
-* @global array $whitelist_options
+* @global array $allowed_options
 *
 * @param array        $new_options
 * @param string|array $options
 * @return array
 */
-function add_option_whitelist( $new_options, $options = '' ) {
+function add_allowed_options( $new_options, $options = '' ) {
-	if ( $options == '' ) {
+	if ( '' === $options ) {
-		global $whitelist_options;
+		global $allowed_options;
 	} else {
-		$whitelist_options = $options;
+		$allowed_options = $options;
 	}
 	foreach ( $new_options as $page => $keys ) {
 		foreach ( $keys as $key ) {
-			if ( ! isset( $whitelist_options[ $page ] ) || ! is_array( $whitelist_options[ $page ] ) ) {
+			if ( ! isset( $allowed_options[ $page ] ) || ! is_array( $allowed_options[ $page ] ) ) {
-				$whitelist_options[ $page ]   = array();
+				$allowed_options[ $page ]   = array();
-				$whitelist_options[ $page ][] = $key;
+				$allowed_options[ $page ][] = $key;
 			} else {
-				$pos = array_search( $key, $whitelist_options[ $page ] );
+				$pos = array_search( $key, $allowed_options[ $page ], true );
-				if ( $pos === false ) {
+				if ( false === $pos ) {
-					$whitelist_options[ $page ][] = $key;
+					$allowed_options[ $page ][] = $key;
 				}
 			}
 		}
 	}
-	return $whitelist_options;
+	return $allowed_options;
 }
 /**
-* Removes a list of options from the options whitelist.
+* Removes a list of options from the allowed options list.
 *
-* @since 2.7.0
+* @since 5.5.0
 *
-* @global array $whitelist_options
+* @global array $allowed_options
 *
 * @param array        $del_options
 * @param string|array $options
 * @return array
 */
-function remove_option_whitelist( $del_options, $options = '' ) {
+function remove_allowed_options( $del_options, $options = '' ) {
-	if ( $options == '' ) {
+	if ( '' === $options ) {
-		global $whitelist_options;
+		global $allowed_options;
 	} else {
-		$whitelist_options = $options;
+		$allowed_options = $options;
 	}
 	foreach ( $del_options as $page => $keys ) {
 		foreach ( $keys as $key ) {
-			if ( isset( $whitelist_options[ $page ] ) && is_array( $whitelist_options[ $page ] ) ) {
+			if ( isset( $allowed_options[ $page ] ) && is_array( $allowed_options[ $page ] ) ) {
-				$pos = array_search( $key, $whitelist_options[ $page ] );
+				$pos = array_search( $key, $allowed_options[ $page ], true );
-				if ( $pos !== false ) {
+				if ( false !== $pos ) {
-					unset( $whitelist_options[ $page ][ $pos ] );
+					unset( $allowed_options[ $page ][ $pos ] );
 				}
 			}
 		}
 	}
-	return $whitelist_options;
+	return $allowed_options;
 }
 /**
 * Output nonce, action, and option_page fields for a settings page.
 *
 * @since 2.7.0
 *
-* @param string $option_group A settings group name. This should match the group name used in register_setting().
+* @param string $option_group A settings group name. This should match the group name
+*                             used in register_setting().
 */
 function settings_fields( $option_group ) {
 	echo "<input type='hidden' name='option_page' value='" . esc_attr( $option_group ) . "' />";
 	echo '<input type="hidden" name="action" value="update" />';
 	wp_nonce_field( "$option_group-options" );
 }
 /**
-* Clears the Plugins cache used by get_plugins() and by default, the Plugin Update cache.
+* Clears the plugins cache used by get_plugins() and by default, the plugin updates cache.
 *
 * @since 3.7.0
 *
-* @param bool $clear_update_cache Whether to clear the Plugin updates cache
+* @param bool $clear_update_cache Whether to clear the plugin updates cache. Default true.
 */
 function wp_clean_plugins_cache( $clear_update_cache = true ) {
 	if ( $clear_update_cache ) {
 		delete_site_transient( 'update_plugins' );
 	}
 */
 function plugin_sandbox_scrape( $plugin ) {
 	if ( ! defined( 'WP_SANDBOX_SCRAPING' ) ) {
 		define( 'WP_SANDBOX_SCRAPING', true );
 	}
 	wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $plugin );
-	include( WP_PLUGIN_DIR . '/' . $plugin );
+	include WP_PLUGIN_DIR . '/' . $plugin;
 }
 /**
 * Helper function for adding content to the Privacy Policy Guide.
 *
 * the suggested policy content. For example modular plugins such as WooCommerse or Jetpack
 * can add or remove suggested content depending on the modules/extensions that are enabled.
 * For more information see the Plugin Handbook:
 * https://developer.wordpress.org/plugins/privacy/suggesting-text-for-the-site-privacy-policy/.
 *
+* The HTML contents of the `$policy_text` supports use of a specialized `.privacy-policy-tutorial`
+* CSS class which can be used to provide supplemental information. Any content contained within
+* HTML elements that have the `.privacy-policy-tutorial` CSS class applied will be omitted
+* from the clipboard when the section content is copied.
+*
 * Intended for use with the `'admin_init'` action.
 *
 * @since 4.9.6
 *
-* @param string $plugin_name The name of the plugin or theme that is suggesting content for the site's privacy policy.
+* @param string $plugin_name The name of the plugin or theme that is suggesting content
+*                            for the site's privacy policy.
 * @param string $policy_text The suggested content for inclusion in the policy.
 */
 function wp_add_privacy_policy_content( $plugin_name, $policy_text ) {
 	if ( ! is_admin() ) {
 		_doing_it_wrong(
 		);
 		return;
 	}
 	if ( ! class_exists( 'WP_Privacy_Policy_Content' ) ) {
-		require_once( ABSPATH . 'wp-admin/includes/misc.php' );
+		require_once ABSPATH . 'wp-admin/includes/class-wp-privacy-policy-content.php';
 	}
 	WP_Privacy_Policy_Content::add( $plugin_name, $policy_text );
 }
 * Conditional Tags} article in the Theme Developer Handbook.
 *
 * @since 5.2.0
 *
 * @param string $plugin Path to the plugin file relative to the plugins directory.
-* @return bool True, if in the list of paused plugins. False, not in the list.
+* @return bool True, if in the list of paused plugins. False, if not in the list.
 */
 function is_plugin_paused( $plugin ) {
 	if ( ! isset( $GLOBALS['_paused_plugins'] ) ) {
 		return false;
 	}
 /**
 * Gets the error that was recorded for a paused plugin.
 *
 * @since 5.2.0
 *
-* @param string $plugin Path to the plugin file relative to the plugins
+* @param string $plugin Path to the plugin file relative to the plugins directory.
-*                       directory.
+* @return array|false Array of error information as returned by `error_get_last()`,
-* @return array|false Array of error information as it was returned by
+*                     or false if none was recorded.
-*                     `error_get_last()`, or false if none was recorded.
 */
 function wp_get_plugin_error( $plugin ) {
 	if ( ! isset( $GLOBALS['_paused_plugins'] ) ) {
 		return false;
 	}
 * include the plugin file. If the plugin fails, then the redirection will not
 * be overwritten with the success message and the plugin will not be resumed.
 *
 * @since 5.2.0
 *
-* @param string $plugin       Single plugin to resume.
+* @param string $plugin   Single plugin to resume.
-* @param string $redirect     Optional. URL to redirect to. Default empty string.
+* @param string $redirect Optional. URL to redirect to. Default empty string.
 * @return bool|WP_Error True on success, false if `$plugin` was not paused,
 *                       `WP_Error` on failure.
 */
 function resume_plugin( $plugin, $redirect = '' ) {
 	/*

changeset 16	a86126ab1dd4
parent 9	177826044cd9
child 18	be944660c56a