angelovcom.net

plugin.php (88385B)

---

 <?php
 /**
  * WordPress Plugin Administration API
  *
  * @package WordPress
  * @subpackage Administration
  */
 
 /**
  * Parses the plugin contents to retrieve plugin's metadata.
  *
  * All plugin headers must be on their own line. Plugin description must not have
  * any newlines, otherwise only parts of the description will be displayed.
  * The below is formatted for printing.
  *
  *     /*
  *     Plugin Name: Name of the plugin.
  *     Plugin URI: The home page of the plugin.
  *     Description: Plugin description.
  *     Author: Plugin author's name.
  *     Author URI: Link to the author's website.
  *     Version: Plugin version.
  *     Text Domain: Optional. Unique identifier, should be same as the one used in
  *          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.
  *     Requires at least: Optional. Specify the minimum required WordPress version.
  *     Requires PHP: Optional. Specify the minimum required PHP version.
  *     * / # Remove the space to close comment.
  *
  * 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
  * 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.
  * @since 5.8.0 Added support for `Update URI` header.
  *
  * @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.
  *     @type string $UpdateURI   ID of the plugin for update purposes, should be a URI.
  * }
  */
 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',
 		'UpdateURI'   => 'Update URI',
 		// 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.
 	$plugin_file = plugin_basename( $plugin_file );
 
 	// Translate fields.
 	if ( $translate ) {
 		$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 ) ) {
 			$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.
 	$allowed_tags_in_links = array(
 		'abbr'    => array( 'title' => true ),
 		'acronym' => array( 'title' => true ),
 		'code'    => true,
 		'em'      => true,
 		'strong'  => true,
 	);
 
 	$allowed_tags      = $allowed_tags_in_links;
 	$allowed_tags['a'] = array(
 		'href'  => true,
 		'title' => true,
 	);
 
 	// Name is marked up inside <a> tags. Don't allow these.
 	// Author is too, but some plugins have used <a> here (omitting Author URI).
 	$plugin_data['Name']   = wp_kses( $plugin_data['Name'], $allowed_tags_in_links );
 	$plugin_data['Author'] = wp_kses( $plugin_data['Author'], $allowed_tags );
 
 	$plugin_data['Description'] = wp_kses( $plugin_data['Description'], $allowed_tags );
 	$plugin_data['Version']     = wp_kses( $plugin_data['Version'], $allowed_tags );
 
 	$plugin_data['PluginURI'] = esc_url( $plugin_data['PluginURI'] );
 	$plugin_data['AuthorURI'] = esc_url( $plugin_data['AuthorURI'] );
 
 	$plugin_data['Title']      = $plugin_data['Name'];
 	$plugin_data['AuthorName'] = $plugin_data['Author'];
 
 	// Apply markup.
 	if ( $markup ) {
 		if ( $plugin_data['PluginURI'] && $plugin_data['Name'] ) {
 			$plugin_data['Title'] = '<a href="' . $plugin_data['PluginURI'] . '">' . $plugin_data['Name'] . '</a>';
 		}
 
 		if ( $plugin_data['AuthorURI'] && $plugin_data['Author'] ) {
 			$plugin_data['Author'] = '<a href="' . $plugin_data['AuthorURI'] . '">' . $plugin_data['Author'] . '</a>';
 		}
 
 		$plugin_data['Description'] = wptexturize( $plugin_data['Description'] );
 
 		if ( $plugin_data['Author'] ) {
 			$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 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 );
 
 	$plugin_files = array( plugin_basename( $plugin_file ) );
 
 	if ( is_dir( $dir ) && WP_PLUGIN_DIR !== $dir ) {
 
 		/**
 		 * Filters the array of excluded directories and files while scanning the folder.
 		 *
 		 * @since 4.9.0
 		 *
 		 * @param string[] $exclusions Array of excluded directories and files.
 		 */
 		$exclusions = (array) apply_filters( 'plugin_files_exclusions', array( 'CVS', 'node_modules', 'vendor', 'bower_components' ) );
 
 		$list_files = list_files( $dir, 100, $exclusions );
 		$list_files = array_map( 'plugin_basename', $list_files );
 
 		$plugin_files = array_merge( $plugin_files, $list_files );
 		$plugin_files = array_values( array_unique( $plugin_files ) );
 	}
 
 	return $plugin_files;
 }
 
 /**
  * Check the plugins directory and retrieve all plugin files with plugin data.
  *
  * WordPress only supports plugin files in the base plugins directory
  * (wp-content/plugins) and in one directory above the plugins directory
  * (wp-content/plugins/my-plugin). The file it looks for has the plugin data
  * and must be found in those two locations. It is recommended to keep your
  * plugin files in their own directories.
  *
  * The file with the plugin data is the file that will be included and therefore
  * needs to have the main execution for the plugin. This does not mean
  * everything must be contained in the file and it is recommended that the file
  * be split for maintainability. Keep everything in one file for extreme
  * optimization purposes.
  *
  * @since 1.5.0
  *
  * @param string $plugin_folder Optional. Relative path to single plugin folder.
  * @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 ) {
 		$cache_plugins = array();
 	}
 
 	if ( isset( $cache_plugins[ $plugin_folder ] ) ) {
 		return $cache_plugins[ $plugin_folder ];
 	}
 
 	$wp_plugins  = array();
 	$plugin_root = WP_PLUGIN_DIR;
 	if ( ! empty( $plugin_folder ) ) {
 		$plugin_root .= $plugin_folder;
 	}
 
 	// 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 ) ) {
 				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 ) ) {
 							continue;
 						}
 
 						if ( '.php' === substr( $subfile, -4 ) ) {
 							$plugin_files[] = "$file/$subfile";
 						}
 					}
 
 					closedir( $plugins_subdir );
 				}
 			} else {
 				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;
 		}
 
 		// 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;
 		}
 
 		$wp_plugins[ plugin_basename( $plugin_file ) ] = $plugin_data;
 	}
 
 	uasort( $wp_plugins, '_sort_uname_callback' );
 
 	$cache_plugins[ $plugin_folder ] = $wp_plugins;
 	wp_cache_set( 'plugins', $cache_plugins, 'plugins' );
 
 	return $wp_plugins;
 }
 
 /**
  * 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[] Array of arrays of mu-plugin data, keyed by plugin file name. See `get_plugin_data()`.
  */
 function get_mu_plugins() {
 	$wp_plugins   = array();
 	$plugin_files = array();
 
 	if ( ! is_dir( WPMU_PLUGIN_DIR ) ) {
 		return $wp_plugins;
 	}
 
 	// Files in wp-content/mu-plugins directory.
 	$plugins_dir = @opendir( WPMU_PLUGIN_DIR );
 	if ( $plugins_dir ) {
 		while ( ( $file = readdir( $plugins_dir ) ) !== false ) {
 			if ( '.php' === substr( $file, -4 ) ) {
 				$plugin_files[] = $file;
 			}
 		}
 	} else {
 		return $wp_plugins;
 	}
 
 	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;
 		}
 
 		// 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.
 		unset( $wp_plugins['index.php'] );
 	}
 
 	uasort( $wp_plugins, '_sort_uname_callback' );
 
 	return $wp_plugins;
 }
 
 /**
  * Callback to sort array by a 'Name' key.
  *
  * @since 3.1.0
  *
  * @access private
  *
  * @param array $a array with 'Name' key.
  * @param array $b array with 'Name' key.
  * @return int Return 0 or 1 based on two string comparison.
  */
 function _sort_uname_callback( $a, $b ) {
 	return strnatcasecmp( $a['Name'], $b['Name'] );
 }
 
 /**
  * Check the wp-content directory and retrieve all drop-ins with any plugin data.
  *
  * @since 3.0.0
  * @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();
 
 	// Files in wp-content directory.
 	$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 );
 
 	if ( empty( $plugin_files ) ) {
 		return $dropins;
 	}
 
 	foreach ( $plugin_files as $plugin_file ) {
 		if ( ! is_readable( WP_CONTENT_DIR . "/$plugin_file" ) ) {
 			continue;
 		}
 
 		// 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' );
 
 	return $dropins;
 }
 
 /**
  * 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
  *  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
 		'db.php'                  => array( __( 'Custom database class.' ), true ),          // Auto on load.
 		'db-error.php'            => array( __( 'Custom database error message.' ), true ),  // Auto on error.
 		'install.php'             => array( __( 'Custom installation script.' ), true ),     // Auto on installation.
 		'maintenance.php'         => array( __( 'Custom maintenance message.' ), true ),     // Auto on maintenance.
 		'object-cache.php'        => array( __( 'External object cache.' ), true ),          // Auto on load.
 		'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.
 	);
 
 	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-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.
 	}
 
 	return $dropins;
 }
 
 /**
  * Determines whether a plugin is active.
  *
  * Only plugins installed in the plugins/ folder can be active.
  *
  * Plugins in the mu-plugins/ folder can't be "activated," so this function will
  * return false for those plugins.
  *
  * 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 2.5.0
  *
  * @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() ), true ) || is_plugin_active_for_network( $plugin );
 }
 
 /**
  * Determines whether the plugin is inactive.
  *
  * Reverse of is_plugin_active(). Used as a callback.
  *
  * 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.
  */
 function is_plugin_inactive( $plugin ) {
 	return ! is_plugin_active( $plugin );
 }
 
 /**
  * Determines whether the plugin is active for the entire network.
  *
  * Only plugins installed in the plugins/ folder can be active.
  *
  * Plugins in the mu-plugins/ folder can't be "activated," so this function will
  * return false for those plugins.
  *
  * 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 3.0.0
  *
  * @param string $plugin Path to the plugin file relative to the plugins directory.
  * @return bool True if active for the network, otherwise false.
  */
 function is_plugin_active_for_network( $plugin ) {
 	if ( ! is_multisite() ) {
 		return false;
 	}
 
 	$plugins = get_site_option( 'active_sitewide_plugins' );
 	if ( isset( $plugins[ $plugin ] ) ) {
 		return true;
 	}
 
 	return false;
 }
 
 /**
  * Checks for "Network: true" in the plugin header to see if this should
  * be activated only as a network wide plugin. The plugin would also work
  * when Multisite is not enabled.
  *
  * Checks for "Site Wide Only: true" for backward compatibility.
  *
  * @since 3.0.0
  *
  * @param string $plugin Path to the plugin file relative to the plugins directory.
  * @return bool True if plugin is network only, false otherwise.
  */
 function is_network_only_plugin( $plugin ) {
 	$plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin );
 	if ( $plugin_data ) {
 		return $plugin_data['Network'];
 	}
 	return false;
 }
 
 /**
  * Attempts activation of plugin in a "sandbox" and redirects on success.
  *
  * A plugin that is already activated will not attempt to be activated again.
  *
  * The way it works is by setting the redirection to the error before trying to
  * include the plugin file. If the plugin fails, then the redirection will not
  * be overwritten with the success message. Also, the options will not be
  * updated and the activation hook will not be called on plugin error.
  *
  * It should be noted that in no way the below code will actually prevent errors
  * within the file. The code should not be used elsewhere to replicate the
  * "sandbox", which uses redirection to work.
  * {@source 13 1}
  *
  * If any errors are found or text is outputted, then it will be captured to
  * ensure that the success redirection will update the error redirection.
  *
  * @since 2.5.0
  * @since 5.2.0 Test for WordPress version and PHP version compatibility.
  *
  * @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 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 ) ) ) {
 		$network_wide        = true;
 		$current             = get_site_option( 'active_sitewide_plugins', array() );
 		$_GET['networkwide'] = 1; // Back compat for plugins looking for this value.
 	} else {
 		$current = get_option( 'active_plugins', array() );
 	}
 
 	$valid = validate_plugin( $plugin );
 	if ( is_wp_error( $valid ) ) {
 		return $valid;
 	}
 
 	$requirements = validate_plugin_requirements( $plugin );
 	if ( is_wp_error( $requirements ) ) {
 		return $requirements;
 	}
 
 	if ( $network_wide && ! isset( $current[ $plugin ] )
 		|| ! $network_wide && ! in_array( $plugin, $current, true )
 	) {
 		if ( ! empty( $redirect ) ) {
 			// 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();
 
 		// Load the plugin to test whether it throws any errors.
 		plugin_sandbox_scrape( $plugin );
 
 		if ( ! $silent ) {
 			/**
 			 * Fires before a plugin is activated.
 			 *
 			 * If a plugin is silently activated (such as during an update),
 			 * 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_wide Whether to enable the plugin for all sites in the network
 			 *                             or just the current site. Multisite only. Default false.
 			 */
 			do_action( 'activate_plugin', $plugin, $network_wide );
 
 			/**
 			 * Fires as a specific plugin is being activated.
 			 *
 			 * This hook is the "activation" hook used internally by register_activation_hook().
 			 * The dynamic portion of the hook name, `$plugin`, refers to the plugin basename.
 			 *
 			 * If a plugin is silently activated (such as during an update), this hook does not fire.
 			 *
 			 * @since 2.0.0
 			 *
 			 * @param bool $network_wide Whether to enable the plugin for all sites in the network
 			 *                           or just the current site. Multisite only. Default false.
 			 */
 			do_action( "activate_{$plugin}", $network_wide );
 		}
 
 		if ( $network_wide ) {
 			$current            = get_site_option( 'active_sitewide_plugins', array() );
 			$current[ $plugin ] = time();
 			update_site_option( 'active_sitewide_plugins', $current );
 		} else {
 			$current   = get_option( 'active_plugins', array() );
 			$current[] = $plugin;
 			sort( $current );
 			update_option( 'active_plugins', $current );
 		}
 
 		if ( ! $silent ) {
 			/**
 			 * Fires after a plugin has been activated.
 			 *
 			 * If a plugin is silently activated (such as during an update),
 			 * 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_wide Whether to enable the plugin for all sites in the network
 			 *                             or just the current site. Multisite only. Default false.
 			 */
 			do_action( 'activated_plugin', $plugin, $network_wide );
 		}
 
 		if ( ob_get_length() > 0 ) {
 			$output = ob_get_clean();
 			return new WP_Error( 'unexpected_output', __( 'The plugin generated unexpected output.' ), $output );
 		}
 
 		ob_end_clean();
 	}
 
 	return null;
 }
 
 /**
  * Deactivate a single plugin or multiple plugins.
  *
  * The deactivation hook is disabled by the plugin upgrader by using the $silent
  * parameter.
  *
  * @since 2.5.0
  *
  * @param string|string[] $plugins      Single plugin or list of plugins to deactivate.
  * @param bool            $silent       Prevent calling deactivation hooks. Default false.
  * @param bool|null       $network_wide Whether to deactivate the plugin for all sites in 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() );
 	$do_blog    = false;
 	$do_network = false;
 
 	foreach ( (array) $plugins as $plugin ) {
 		$plugin = plugin_basename( trim( $plugin ) );
 		if ( ! is_plugin_active( $plugin ) ) {
 			continue;
 		}
 
 		$network_deactivating = ( false !== $network_wide ) && is_plugin_active_for_network( $plugin );
 
 		if ( ! $silent ) {
 			/**
 			 * Fires before a plugin is deactivated.
 			 *
 			 * If a plugin is silently deactivated (such as during an update),
 			 * 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
 			 *                                     or just the current site. Multisite only. Default false.
 			 */
 			do_action( 'deactivate_plugin', $plugin, $network_deactivating );
 		}
 
 		if ( false !== $network_wide ) {
 			if ( is_plugin_active_for_network( $plugin ) ) {
 				$do_network = true;
 				unset( $network_current[ $plugin ] );
 			} elseif ( $network_wide ) {
 				continue;
 			}
 		}
 
 		if ( true !== $network_wide ) {
 			$key = array_search( $plugin, $current, true );
 			if ( false !== $key ) {
 				$do_blog = true;
 				unset( $current[ $key ] );
 			}
 		}
 
 		if ( $do_blog && wp_is_recovery_mode() ) {
 			list( $extension ) = explode( '/', $plugin );
 			wp_paused_plugins()->delete( $extension );
 		}
 
 		if ( ! $silent ) {
 			/**
 			 * Fires as a specific plugin is being deactivated.
 			 *
 			 * This hook is the "deactivation" hook used internally by register_deactivation_hook().
 			 * The dynamic portion of the hook name, `$plugin`, refers to the plugin basename.
 			 *
 			 * If a plugin is silently deactivated (such as during an update), this hook does not fire.
 			 *
 			 * @since 2.0.0
 			 *
 			 * @param bool $network_deactivating Whether the plugin is deactivated for all sites in the network
 			 *                                   or just the current site. Multisite only. Default false.
 			 */
 			do_action( "deactivate_{$plugin}", $network_deactivating );
 
 			/**
 			 * Fires after a plugin is deactivated.
 			 *
 			 * If a plugin is silently deactivated (such as during an update),
 			 * 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
 			 *                                     or just the current site. Multisite only. Default false.
 			 */
 			do_action( 'deactivated_plugin', $plugin, $network_deactivating );
 		}
 	}
 
 	if ( $do_blog ) {
 		update_option( 'active_plugins', $current );
 	}
 	if ( $do_network ) {
 		update_site_option( 'active_sitewide_plugins', $network_current );
 	}
 }
 
 /**
  * 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 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|string[] $plugins      Single plugin or list of plugins to activate.
  * @param string          $redirect     Redirect to page after successful activation.
  * @param bool            $network_wide Whether to enable the plugin for all sites in the network.
  *                                      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 );
 	}
 
 	$errors = array();
 	foreach ( $plugins as $plugin ) {
 		if ( ! empty( $redirect ) ) {
 			$redirect = add_query_arg( 'plugin', $plugin, $redirect );
 		}
 		$result = activate_plugin( $plugin, $redirect, $network_wide, $silent );
 		if ( is_wp_error( $result ) ) {
 			$errors[ $plugin ] = $result;
 		}
 	}
 
 	if ( ! empty( $errors ) ) {
 		return new WP_Error( 'plugins_invalid', __( 'One of the plugins is invalid.' ), $errors );
 	}
 
 	return true;
 }
 
 /**
  * Remove directory and files of a plugin for a list of plugins.
  *
  * @since 2.6.0
  *
  * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
  *
  * @param string[] $plugins    List of plugin paths to delete, relative to the plugins directory.
  * @param string   $deprecated Not used.
  * @return bool|null|WP_Error True on success, false if `$plugins` is empty, `WP_Error` on failure.
  *                            `null` if filesystem credentials are required to proceed.
  */
 function delete_plugins( $plugins, $deprecated = '' ) {
 	global $wp_filesystem;
 
 	if ( empty( $plugins ) ) {
 		return false;
 	}
 
 	$checked = array();
 	foreach ( $plugins as $plugin ) {
 		$checked[] = 'checked[]=' . $plugin;
 	}
 
 	$url = wp_nonce_url( 'plugins.php?action=delete-selected&verify-delete=1&' . implode( '&', $checked ), 'bulk-plugins' );
 
 	ob_start();
 	$credentials = request_filesystem_credentials( $url );
 	$data        = ob_get_clean();
 
 	if ( false === $credentials ) {
 		if ( ! empty( $data ) ) {
 			require_once ABSPATH . 'wp-admin/admin-header.php';
 			echo $data;
 			require_once ABSPATH . 'wp-admin/admin-footer.php';
 			exit;
 		}
 		return;
 	}
 
 	if ( ! WP_Filesystem( $credentials ) ) {
 		ob_start();
 		// Failed to connect. Error and request again.
 		request_filesystem_credentials( $url, '', true );
 		$data = ob_get_clean();
 
 		if ( ! empty( $data ) ) {
 			require_once ABSPATH . 'wp-admin/admin-header.php';
 			echo $data;
 			require_once ABSPATH . 'wp-admin/admin-footer.php';
 			exit;
 		}
 		return;
 	}
 
 	if ( ! is_object( $wp_filesystem ) ) {
 		return new WP_Error( 'fs_unavailable', __( 'Could not access filesystem.' ) );
 	}
 
 	if ( is_wp_error( $wp_filesystem->errors ) && $wp_filesystem->errors->has_errors() ) {
 		return new WP_Error( 'fs_error', __( 'Filesystem error.' ), $wp_filesystem->errors );
 	}
 
 	// Get the base plugin folder.
 	$plugins_dir = $wp_filesystem->wp_plugins_dir();
 	if ( empty( $plugins_dir ) ) {
 		return new WP_Error( 'fs_no_plugins_dir', __( 'Unable to locate WordPress plugin directory.' ) );
 	}
 
 	$plugins_dir = trailingslashit( $plugins_dir );
 
 	$plugin_translations = wp_get_installed_translations( 'plugins' );
 
 	$errors = array();
 
 	foreach ( $plugins as $plugin_file ) {
 		// Run Uninstall hook.
 		if ( is_uninstallable_plugin( $plugin_file ) ) {
 			uninstall_plugin( $plugin_file );
 		}
 
 		/**
 		 * Fires immediately before a plugin deletion attempt.
 		 *
 		 * @since 4.4.0
 		 *
 		 * @param string $plugin_file Path to the plugin file relative to the plugins directory.
 		 */
 		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.
 		// 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 );
 		}
 
 		/**
 		 * Fires immediately after a plugin deletion attempt.
 		 *
 		 * @since 4.4.0
 		 *
 		 * @param string $plugin_file Path to the plugin file relative to the plugins directory.
 		 * @param bool   $deleted     Whether the plugin deletion was successful.
 		 */
 		do_action( 'deleted_plugin', $plugin_file, $deleted );
 
 		if ( ! $deleted ) {
 			$errors[] = $plugin_file;
 			continue;
 		}
 
 		$plugin_slug = dirname( $plugin_file );
 
 		if ( 'hello.php' === $plugin_file ) {
 			$plugin_slug = 'hello-dolly';
 		}
 
 		// Remove language files, silently.
 		if ( '.' !== $plugin_slug && ! empty( $plugin_translations[ $plugin_slug ] ) ) {
 			$translations = $plugin_translations[ $plugin_slug ];
 
 			foreach ( $translations as $translation => $data ) {
 				$wp_filesystem->delete( WP_LANG_DIR . '/plugins/' . $plugin_slug . '-' . $translation . '.po' );
 				$wp_filesystem->delete( WP_LANG_DIR . '/plugins/' . $plugin_slug . '-' . $translation . '.mo' );
 
 				$json_translation_files = glob( WP_LANG_DIR . '/plugins/' . $plugin_slug . '-' . $translation . '-*.json' );
 				if ( $json_translation_files ) {
 					array_map( array( $wp_filesystem, 'delete' ), $json_translation_files );
 				}
 			}
 		}
 	}
 
 	// Remove deleted plugins from the plugin updates list.
 	$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. */
 			$message = __( 'Could not fully remove the plugin %s.' );
 		} else {
 			/* 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 ) ) );
 	}
 
 	return true;
 }
 
 /**
  * Validate active plugins
  *
  * Validate all active plugins, deactivates invalid and
  * returns an array of deactivated ones.
  *
  * @since 2.5.0
  * @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 ) ) {
 		update_option( 'active_plugins', array() );
 		$plugins = array();
 	}
 
 	if ( is_multisite() && current_user_can( 'manage_network_plugins' ) ) {
 		$network_plugins = (array) get_site_option( 'active_sitewide_plugins', array() );
 		$plugins         = array_merge( $plugins, array_keys( $network_plugins ) );
 	}
 
 	if ( empty( $plugins ) ) {
 		return array();
 	}
 
 	$invalid = array();
 
 	// Invalid plugins get deactivated.
 	foreach ( $plugins as $plugin ) {
 		$result = validate_plugin( $plugin );
 		if ( is_wp_error( $result ) ) {
 			$invalid[ $plugin ] = $result;
 			deactivate_plugins( $plugin, true );
 		}
 	}
 	return $invalid;
 }
 
 /**
  * Validate the plugin path.
  *
  * 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 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.' ) );
 	}
 	if ( ! file_exists( WP_PLUGIN_DIR . '/' . $plugin ) ) {
 		return new WP_Error( 'plugin_not_found', __( 'Plugin file does not exist.' ) );
 	}
 
 	$installed_plugins = get_plugins();
 	if ( ! isset( $installed_plugins[ $plugin ] ) ) {
 		return new WP_Error( 'no_plugin_header', __( 'The plugin does not have a valid header.' ) );
 	}
 	return 0;
 }
 
 /**
  * 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.
  *
  * @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.
  * @since 5.8.0 Removed support for using `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'] : '',
 	);
 
 	$compatible_wp  = is_wp_version_compatible( $requirements['requires'] );
 	$compatible_php = is_php_version_compatible( $requirements['requires_php'] );
 
 	$php_update_message = '</p><p>' . sprintf(
 		/* translators: %s: URL to Update PHP page. */
 		__( '<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 && ! $compatible_php ) {
 		return new WP_Error(
 			'plugin_wp_php_incompatible',
 			'<p>' . sprintf(
 				/* translators: 1: Current WordPress version, 2: Current PHP version, 3: Plugin name, 4: Required WordPress version, 5: Required PHP version. */
 				_x( '<strong>Error:</strong> Current versions of WordPress (%1$s) and PHP (%2$s) do not meet minimum requirements for %3$s. The plugin requires WordPress %4$s and PHP %5$s.', 'plugin' ),
 				get_bloginfo( 'version' ),
 				phpversion(),
 				$plugin_headers['Name'],
 				$requirements['requires'],
 				$requirements['requires_php']
 			) . $php_update_message . '</p>'
 		);
 	} elseif ( ! $compatible_php ) {
 		return new WP_Error(
 			'plugin_php_incompatible',
 			'<p>' . sprintf(
 				/* translators: 1: Current PHP version, 2: Plugin name, 3: Required PHP version. */
 				_x( '<strong>Error:</strong> Current PHP version (%1$s) does not meet minimum requirements for %2$s. The plugin requires PHP %3$s.', 'plugin' ),
 				phpversion(),
 				$plugin_headers['Name'],
 				$requirements['requires_php']
 			) . $php_update_message . '</p>'
 		);
 	} elseif ( ! $compatible_wp ) {
 		return new WP_Error(
 			'plugin_wp_incompatible',
 			'<p>' . sprintf(
 				/* translators: 1: Current WordPress version, 2: Plugin name, 3: Required WordPress version. */
 				_x( '<strong>Error:</strong> Current WordPress version (%1$s) does not meet minimum requirements for %2$s. The plugin requires WordPress %3$s.', 'plugin' ),
 				get_bloginfo( 'version' ),
 				$plugin_headers['Name'],
 				$requirements['requires']
 			) . '</p>'
 		);
 	}
 
 	return true;
 }
 
 /**
  * Whether the plugin can be uninstalled.
  *
  * @since 2.7.0
  *
  * @param string $plugin Path to the plugin file relative to the plugins directory.
  * @return bool Whether plugin can be uninstalled.
  */
 function is_uninstallable_plugin( $plugin ) {
 	$file = plugin_basename( $plugin );
 
 	$uninstallable_plugins = (array) get_option( 'uninstall_plugins' );
 	if ( isset( $uninstallable_plugins[ $file ] ) || file_exists( WP_PLUGIN_DIR . '/' . dirname( $file ) . '/uninstall.php' ) ) {
 		return true;
 	}
 
 	return false;
 }
 
 /**
  * Uninstall a single plugin.
  *
  * Calls the uninstall hook, if it is available.
  *
  * @since 2.7.0
  *
  * @param string $plugin Path to the plugin file relative to the plugins directory.
  * @return true|void True if a plugin's uninstall.php file has been found and included.
  *                   Void otherwise.
  */
 function uninstall_plugin( $plugin ) {
 	$file = plugin_basename( $plugin );
 
 	$uninstallable_plugins = (array) get_option( 'uninstall_plugins' );
 
 	/**
 	 * Fires in uninstall_plugin() immediately before the plugin is uninstalled.
 	 *
 	 * @since 4.5.0
 	 *
 	 * @param string $plugin                Path to the plugin file relative to the plugins directory.
 	 * @param array  $uninstallable_plugins Uninstallable plugins.
 	 */
 	do_action( 'pre_uninstall_plugin', $plugin, $uninstallable_plugins );
 
 	if ( file_exists( WP_PLUGIN_DIR . '/' . dirname( $file ) . '/uninstall.php' ) ) {
 		if ( isset( $uninstallable_plugins[ $file ] ) ) {
 			unset( $uninstallable_plugins[ $file ] );
 			update_option( 'uninstall_plugins', $uninstallable_plugins );
 		}
 		unset( $uninstallable_plugins );
 
 		define( 'WP_UNINSTALL_PLUGIN', $file );
 
 		wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $file );
 		include_once WP_PLUGIN_DIR . '/' . dirname( $file ) . '/uninstall.php';
 
 		return true;
 	}
 
 	if ( isset( $uninstallable_plugins[ $file ] ) ) {
 		$callable = $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_once WP_PLUGIN_DIR . '/' . $file;
 
 		add_action( "uninstall_{$file}", $callable );
 
 		/**
 		 * Fires in uninstall_plugin() once the plugin has been uninstalled.
 		 *
 		 * The action concatenates the 'uninstall_' prefix with the basename of the
 		 * plugin passed to uninstall_plugin() to create a dynamically-named action.
 		 *
 		 * @since 2.7.0
 		 */
 		do_action( "uninstall_{$file}" );
 	}
 }
 
 //
 // Menu.
 //
 
 /**
  * Add a top-level menu page.
  *
  * 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 1.5.0
  *
  * @global array $menu
  * @global array $admin_page_hooks
  * @global array $_registered_pages
  * @global array $_parent_pages
  *
  * @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 page 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.
  * @param string   $icon_url   The URL to the icon to be used for this menu.
  *                             * 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 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_slug = plugin_basename( $menu_slug );
 
 	$admin_page_hooks[ $menu_slug ] = sanitize_title( $menu_title );
 
 	$hookname = get_plugin_page_hookname( $menu_slug, '' );
 
 	if ( ! empty( $function ) && ! empty( $hookname ) && current_user_can( $capability ) ) {
 		add_action( $hookname, $function );
 	}
 
 	if ( empty( $icon_url ) ) {
 		$icon_url   = 'dashicons-admin-generic';
 		$icon_class = 'menu-icon-generic ';
 	} else {
 		$icon_url   = set_url_scheme( $icon_url );
 		$icon_class = '';
 	}
 
 	$new_menu = array( $menu_title, $capability, $menu_slug, $page_title, 'menu-top ' . $icon_class . $hookname, $hookname, $icon_url );
 
 	if ( null === $position ) {
 		$menu[] = $new_menu;
 	} elseif ( isset( $menu[ "$position" ] ) ) {
 		$position            = $position + substr( base_convert( md5( $menu_slug . $menu_title ), 16, 10 ), -5 ) * 0.00001;
 		$menu[ "$position" ] = $new_menu;
 	} else {
 		$menu[ $position ] = $new_menu;
 	}
 
 	$_registered_pages[ $hookname ] = true;
 
 	// No parent as top level.
 	$_parent_pages[ $menu_slug ] = false;
 
 	return $hookname;
 }
 
 /**
  * Add a submenu page.
  *
  * 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 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
  * @global array $_registered_pages
  * @global array $_parent_pages
  *
  * @param string   $parent_slug The slug name for the parent menu (or the file name of a standard
  *                              WordPress admin page).
  * @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
  *                              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.
  * @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 = '', $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 );
 
 	if ( isset( $_wp_real_parent_file[ $parent_slug ] ) ) {
 		$parent_slug = $_wp_real_parent_file[ $parent_slug ];
 	}
 
 	if ( ! current_user_can( $capability ) ) {
 		$_wp_submenu_nopriv[ $parent_slug ][ $menu_slug ] = true;
 		return false;
 	}
 
 	/*
 	 * If the parent doesn't already have a submenu, add a link to the parent
 	 * as the first item in the submenu. If the submenu file is the same as the
 	 * parent file someone is trying to link back to the parent manually. In
 	 * this case, don't automatically add a link back to avoid duplication.
 	 */
 	if ( ! isset( $submenu[ $parent_slug ] ) && $menu_slug !== $parent_slug ) {
 		foreach ( (array) $menu as $parent_menu ) {
 			if ( $parent_menu[2] === $parent_slug && current_user_can( $parent_menu[1] ) ) {
 				$submenu[ $parent_slug ][] = array_slice( $parent_menu, 0, 4 );
 			}
 		}
 	}
 
 	$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 );
 	}
 
 	$_registered_pages[ $hookname ] = true;
 
 	/*
 	 * 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 ) {
 		$_registered_pages[ get_plugin_page_hookname( $menu_slug, 'edit.php' ) ] = true;
 	}
 
 	// No parent as top level.
 	$_parent_pages[ $menu_slug ] = $parent_slug;
 
 	return $hookname;
 }
 
 /**
  * Add submenu page to the Tools 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 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.
  * @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 = '', $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.
  *
  * 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 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.
  * @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 = '', $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.
  *
  * 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 2.0.0
  * @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.
  * @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 = '', $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.
  *
  * 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 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.
  * @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 = '', $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.
  *
  * 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 2.1.3
  * @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.
  * @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 = '', $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, $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.
  * @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 = '', $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.
  *
  * 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.
  * @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 = '', $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.
  *
  * 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.
  * @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 = '', $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.
  *
  * 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.
  * @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 = '', $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.
  *
  * 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.
  * @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 = '', $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.
  *
  * 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.
  * @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 = '', $position = null ) {
 	return add_submenu_page( 'edit-comments.php', $page_title, $menu_title, $capability, $menu_slug, $function, $position );
 }
 
 /**
  * Remove a top-level admin menu.
  *
  * @since 3.1.0
  *
  * @global array $menu
  *
  * @param string $menu_slug The slug of the menu.
  * @return array|false The removed menu on success, false if not found.
  */
 function remove_menu_page( $menu_slug ) {
 	global $menu;
 
 	foreach ( $menu as $i => $item ) {
 		if ( $menu_slug === $item[2] ) {
 			unset( $menu[ $i ] );
 			return $item;
 		}
 	}
 
 	return false;
 }
 
 /**
  * Remove an admin submenu.
  *
  * @since 3.1.0
  *
  * @global array $submenu
  *
  * @param string $menu_slug    The slug for the parent menu.
  * @param string $submenu_slug The slug of the submenu.
  * @return array|false The removed submenu on success, false if not found.
  */
 function remove_submenu_page( $menu_slug, $submenu_slug ) {
 	global $submenu;
 
 	if ( ! isset( $submenu[ $menu_slug ] ) ) {
 		return false;
 	}
 
 	foreach ( $submenu[ $menu_slug ] as $i => $item ) {
 		if ( $submenu_slug === $item[2] ) {
 			unset( $submenu[ $menu_slug ][ $i ] );
 			return $item;
 		}
 	}
 
 	return false;
 }
 
 /**
  * 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.
  *
  * @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 bool   $echo      Whether or not to echo the URL. Default true.
  * @return string The menu page URL.
  */
 function menu_page_url( $menu_slug, $echo = true ) {
 	global $_parent_pages;
 
 	if ( isset( $_parent_pages[ $menu_slug ] ) ) {
 		$parent_slug = $_parent_pages[ $menu_slug ];
 
 		if ( $parent_slug && ! isset( $_parent_pages[ $parent_slug ] ) ) {
 			$url = admin_url( add_query_arg( 'page', $menu_slug, $parent_slug ) );
 		} else {
 			$url = admin_url( 'admin.php?page=' . $menu_slug );
 		}
 	} else {
 		$url = '';
 	}
 
 	$url = esc_url( $url );
 
 	if ( $echo ) {
 		echo $url;
 	}
 
 	return $url;
 }
 
 //
 // 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  $submenu
  * @global string $pagenow
  * @global string $typenow
  * @global string $plugin_page
  * @global array  $_wp_real_parent_file
  * @global array  $_wp_menu_nopriv
  * @global array  $_wp_submenu_nopriv
  *
  * @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 ( isset( $_wp_real_parent_file[ $parent ] ) ) {
 			$parent = $_wp_real_parent_file[ $parent ];
 		}
 
 		return $parent;
 	}
 
 	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 ];
 				}
 
 				return $parent_file;
 			}
 		}
 		if ( isset( $_wp_menu_nopriv[ $plugin_page ] ) ) {
 			$parent_file = $plugin_page;
 
 			if ( isset( $_wp_real_parent_file[ $parent_file ] ) ) {
 					$parent_file = $_wp_real_parent_file[ $parent_file ];
 			}
 
 			return $parent_file;
 		}
 	}
 
 	if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[ $pagenow ][ $plugin_page ] ) ) {
 		$parent_file = $pagenow;
 
 		if ( isset( $_wp_real_parent_file[ $parent_file ] ) ) {
 			$parent_file = $_wp_real_parent_file[ $parent_file ];
 		}
 
 		return $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( $typenow ) && "$pagenow?post_type=$typenow" === $submenu_array[2] ) {
 				$parent_file = $parent;
 				return $parent;
 			} elseif ( empty( $typenow ) && $pagenow === $submenu_array[2]
 				&& ( empty( $parent_file ) || false === strpos( $parent_file, '?' ) )
 			) {
 				$parent_file = $parent;
 				return $parent;
 			} elseif ( isset( $plugin_page ) && $plugin_page === $submenu_array[2] ) {
 				$parent_file = $parent;
 				return $parent;
 			}
 		}
 	}
 
 	if ( empty( $parent_file ) ) {
 		$parent_file = '';
 	}
 	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 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  = 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[5] ) {
 					$title = $menu_array[3];
 					return $menu_array[3];
 				}
 			} else {
 				$title = $menu_array[0];
 				return $title;
 			}
 		}
 	} else {
 		foreach ( array_keys( $submenu ) as $parent ) {
 			foreach ( $submenu[ $parent ] as $submenu_array ) {
 				if ( isset( $plugin_page )
 					&& $plugin_page === $submenu_array[2]
 					&& ( $pagenow === $parent
 						|| $plugin_page === $parent
 						|| $plugin_page === $hook
 						|| 'admin.php' === $pagenow && $parent1 !== $submenu_array[2]
 						|| ! empty( $typenow ) && "$pagenow?post_type=$typenow" === $parent )
 					) {
 						$title = $submenu_array[3];
 						return $submenu_array[3];
 				}
 
 				if ( $submenu_array[2] !== $pagenow || isset( $_GET['page'] ) ) { // Not the current page.
 					continue;
 				}
 
 				if ( isset( $submenu_array[3] ) ) {
 					$title = $submenu_array[3];
 					return $submenu_array[3];
 				} else {
 					$title = $submenu_array[0];
 					return $title;
 				}
 			}
 		}
 		if ( empty( $title ) ) {
 			foreach ( $menu as $menu_array ) {
 				if ( isset( $plugin_page )
 					&& $plugin_page === $menu_array[2]
 					&& 'admin.php' === $pagenow
 					&& $parent1 === $menu_array[2]
 				) {
 						$title = $menu_array[3];
 						return $menu_array[3];
 				}
 			}
 		}
 	}
 
 	return $title;
 }
 
 /**
  * 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.
  */
 function get_plugin_page_hook( $plugin_page, $parent_page ) {
 	$hook = get_plugin_page_hookname( $plugin_page, $parent_page );
 	if ( has_action( $hook ) ) {
 		return $hook;
 	} else {
 		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).
  * @return string Hook name for the plugin page.
  */
 function get_plugin_page_hookname( $plugin_page, $parent_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 ( isset( $admin_page_hooks[ $plugin_page ] ) ) {
 			$page_type = 'toplevel';
 		} elseif ( isset( $admin_page_hooks[ $parent ] ) ) {
 			$page_type = $admin_page_hooks[ $parent ];
 		}
 	} elseif ( isset( $admin_page_hooks[ $parent ] ) ) {
 		$page_type = $admin_page_hooks[ $parent ];
 	}
 
 	$plugin_name = preg_replace( '!\.php!', '', $plugin_page );
 
 	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  $submenu
  * @global array  $_wp_menu_nopriv
  * @global array  $_wp_submenu_nopriv
  * @global string $plugin_page
  * @global array  $_registered_pages
  *
  * @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;
 
 	$parent = get_admin_page_parent();
 
 	if ( ! isset( $plugin_page ) && isset( $_wp_submenu_nopriv[ $parent ][ $pagenow ] ) ) {
 		return false;
 	}
 
 	if ( isset( $plugin_page ) ) {
 		if ( isset( $_wp_submenu_nopriv[ $parent ][ $plugin_page ] ) ) {
 			return false;
 		}
 
 		$hookname = get_plugin_page_hookname( $plugin_page, $parent );
 
 		if ( ! isset( $_registered_pages[ $hookname ] ) ) {
 			return false;
 		}
 	}
 
 	if ( empty( $parent ) ) {
 		if ( isset( $_wp_menu_nopriv[ $pagenow ] ) ) {
 			return false;
 		}
 		if ( isset( $_wp_submenu_nopriv[ $pagenow ][ $pagenow ] ) ) {
 			return false;
 		}
 		if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[ $pagenow ][ $plugin_page ] ) ) {
 			return false;
 		}
 		if ( isset( $plugin_page ) && isset( $_wp_menu_nopriv[ $plugin_page ] ) ) {
 			return false;
 		}
 
 		foreach ( array_keys( $_wp_submenu_nopriv ) as $key ) {
 			if ( isset( $_wp_submenu_nopriv[ $key ][ $pagenow ] ) ) {
 				return false;
 			}
 			if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[ $key ][ $plugin_page ] ) ) {
 				return false;
 			}
 		}
 
 		return true;
 	}
 
 	if ( isset( $plugin_page ) && $plugin_page === $parent && isset( $_wp_menu_nopriv[ $plugin_page ] ) ) {
 		return false;
 	}
 
 	if ( isset( $submenu[ $parent ] ) ) {
 		foreach ( $submenu[ $parent ] as $submenu_array ) {
 			if ( isset( $plugin_page ) && $submenu_array[2] === $plugin_page ) {
 				return current_user_can( $submenu_array[1] );
 			} elseif ( $submenu_array[2] === $pagenow ) {
 				return current_user_can( $submenu_array[1] );
 			}
 		}
 	}
 
 	foreach ( $menu as $menu_array ) {
 		if ( $menu_array[2] === $parent ) {
 			return current_user_can( $menu_array[1] );
 		}
 	}
 
 	return true;
 }
 
 /* Allowed list functions */
 
 /**
  * Refreshes the value of the allowed options list available via the 'allowed_options' hook.
  *
  * See the {@see 'allowed_options'} filter.
  *
  * @since 2.7.0
  * @since 5.5.0 `$new_whitelist_options` was renamed to `$new_allowed_options`.
  *              Please consider writing more inclusive code.
  *
  * @global array $new_allowed_options
  *
  * @param array $options
  * @return array
  */
 function option_update_filter( $options ) {
 	global $new_allowed_options;
 
 	if ( is_array( $new_allowed_options ) ) {
 		$options = add_allowed_options( $new_allowed_options, $options );
 	}
 
 	return $options;
 }
 
 /**
  * Adds an array of options to the list of allowed options.
  *
  * @since 5.5.0
  *
  * @global array $allowed_options
  *
  * @param array        $new_options
  * @param string|array $options
  * @return array
  */
 function add_allowed_options( $new_options, $options = '' ) {
 	if ( '' === $options ) {
 		global $allowed_options;
 	} else {
 		$allowed_options = $options;
 	}
 
 	foreach ( $new_options as $page => $keys ) {
 		foreach ( $keys as $key ) {
 			if ( ! isset( $allowed_options[ $page ] ) || ! is_array( $allowed_options[ $page ] ) ) {
 				$allowed_options[ $page ]   = array();
 				$allowed_options[ $page ][] = $key;
 			} else {
 				$pos = array_search( $key, $allowed_options[ $page ], true );
 				if ( false === $pos ) {
 					$allowed_options[ $page ][] = $key;
 				}
 			}
 		}
 	}
 
 	return $allowed_options;
 }
 
 /**
  * Removes a list of options from the allowed options list.
  *
  * @since 5.5.0
  *
  * @global array $allowed_options
  *
  * @param array        $del_options
  * @param string|array $options
  * @return array
  */
 function remove_allowed_options( $del_options, $options = '' ) {
 	if ( '' === $options ) {
 		global $allowed_options;
 	} else {
 		$allowed_options = $options;
 	}
 
 	foreach ( $del_options as $page => $keys ) {
 		foreach ( $keys as $key ) {
 			if ( isset( $allowed_options[ $page ] ) && is_array( $allowed_options[ $page ] ) ) {
 				$pos = array_search( $key, $allowed_options[ $page ], true );
 				if ( false !== $pos ) {
 					unset( $allowed_options[ $page ][ $pos ] );
 				}
 			}
 		}
 	}
 
 	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().
  */
 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 updates cache.
  *
  * @since 3.7.0
  *
  * @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' );
 	}
 	wp_cache_delete( 'plugins', 'plugins' );
 }
 
 /**
  * Load a given plugin attempt to generate errors.
  *
  * @since 3.0.0
  * @since 4.4.0 Function was moved into the `wp-admin/includes/plugin.php` file.
  *
  * @param string $plugin Path to the plugin file relative to the plugins directory.
  */
 function plugin_sandbox_scrape( $plugin ) {
 	if ( ! defined( 'WP_SANDBOX_SCRAPING' ) ) {
 		define( 'WP_SANDBOX_SCRAPING', true );
 	}
 
 	wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $plugin );
 	include_once WP_PLUGIN_DIR . '/' . $plugin;
 }
 
 /**
  * Helper function for adding content to the Privacy Policy Guide.
  *
  * Plugins and themes should suggest text for inclusion in the site's privacy policy.
  * The suggested text should contain information about any functionality that affects user privacy,
  * and will be shown on the Privacy Policy Guide screen.
  *
  * A plugin or theme can use this function multiple times as long as it will help to better present
  * 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 $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(
 			__FUNCTION__,
 			sprintf(
 				/* translators: %s: admin_init */
 				__( 'The suggested privacy policy content should be added only in wp-admin by using the %s (or later) action.' ),
 				'<code>admin_init</code>'
 			),
 			'4.9.7'
 		);
 		return;
 	} elseif ( ! doing_action( 'admin_init' ) && ! did_action( 'admin_init' ) ) {
 		_doing_it_wrong(
 			__FUNCTION__,
 			sprintf(
 				/* translators: %s: admin_init */
 				__( 'The suggested privacy policy content should be added by using the %s (or later) action. Please see the inline documentation.' ),
 				'<code>admin_init</code>'
 			),
 			'4.9.7'
 		);
 		return;
 	}
 
 	if ( ! class_exists( 'WP_Privacy_Policy_Content' ) ) {
 		require_once ABSPATH . 'wp-admin/includes/class-wp-privacy-policy-content.php';
 	}
 
 	WP_Privacy_Policy_Content::add( $plugin_name, $policy_text );
 }
 
 /**
  * Determines whether a plugin is technically active but was paused while
  * loading.
  *
  * 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 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, if not in the list.
  */
 function is_plugin_paused( $plugin ) {
 	if ( ! isset( $GLOBALS['_paused_plugins'] ) ) {
 		return false;
 	}
 
 	if ( ! is_plugin_active( $plugin ) ) {
 		return false;
 	}
 
 	list( $plugin ) = explode( '/', $plugin );
 
 	return array_key_exists( $plugin, $GLOBALS['_paused_plugins'] );
 }
 
 /**
  * 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 directory.
  * @return array|false Array of error information as returned by `error_get_last()`,
  *                     or false if none was recorded.
  */
 function wp_get_plugin_error( $plugin ) {
 	if ( ! isset( $GLOBALS['_paused_plugins'] ) ) {
 		return false;
 	}
 
 	list( $plugin ) = explode( '/', $plugin );
 
 	if ( ! array_key_exists( $plugin, $GLOBALS['_paused_plugins'] ) ) {
 		return false;
 	}
 
 	return $GLOBALS['_paused_plugins'][ $plugin ];
 }
 
 /**
  * Tries to resume a single plugin.
  *
  * If a redirect was provided, we first ensure the plugin does not throw fatal
  * errors anymore.
  *
  * The way it works is by setting the redirection to the error before trying to
  * 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 $redirect Optional. URL to redirect to. Default empty string.
  * @return bool|WP_Error True on success, false if `$plugin` was not paused,
  *                       `WP_Error` on failure.
  */
 function resume_plugin( $plugin, $redirect = '' ) {
 	/*
 	 * We'll override this later if the plugin could be resumed without
 	 * creating a fatal error.
 	 */
 	if ( ! empty( $redirect ) ) {
 		wp_redirect(
 			add_query_arg(
 				'_error_nonce',
 				wp_create_nonce( 'plugin-resume-error_' . $plugin ),
 				$redirect
 			)
 		);
 
 		// Load the plugin to test whether it throws a fatal error.
 		ob_start();
 		plugin_sandbox_scrape( $plugin );
 		ob_clean();
 	}
 
 	list( $extension ) = explode( '/', $plugin );
 
 	$result = wp_paused_plugins()->delete( $extension );
 
 	if ( ! $result ) {
 		return new WP_Error(
 			'could_not_resume_plugin',
 			__( 'Could not resume the plugin.' )
 		);
 	}
 
 	return true;
 }
 
 /**
  * Renders an admin notice in case some plugins have been paused due to errors.
  *
  * @since 5.2.0
  *
  * @global string $pagenow
  */
 function paused_plugins_notice() {
 	if ( 'plugins.php' === $GLOBALS['pagenow'] ) {
 		return;
 	}
 
 	if ( ! current_user_can( 'resume_plugins' ) ) {
 		return;
 	}
 
 	if ( ! isset( $GLOBALS['_paused_plugins'] ) || empty( $GLOBALS['_paused_plugins'] ) ) {
 		return;
 	}
 
 	printf(
 		'<div class="notice notice-error"><p><strong>%s</strong><br>%s</p><p><a href="%s">%s</a></p></div>',
 		__( 'One or more plugins failed to load properly.' ),
 		__( 'You can find more details and make changes on the Plugins screen.' ),
 		esc_url( admin_url( 'plugins.php?plugin_status=paused' ) ),
 		__( 'Go to the Plugins screen' )
 	);
 }
 
 /**
  * Renders an admin notice when a plugin was deactivated during an update.
  *
  * Displays an admin notice in case a plugin has been deactivated during an
  * upgrade due to incompatibility with the current version of WordPress.
  *
  * @since 5.8.0
  * @access private
  *
  * @global string $pagenow
  * @global string $wp_version
  */
 function deactivated_plugins_notice() {
 	if ( 'plugins.php' === $GLOBALS['pagenow'] ) {
 		return;
 	}
 
 	if ( ! current_user_can( 'activate_plugins' ) ) {
 		return;
 	}
 
 	$blog_deactivated_plugins = get_option( 'wp_force_deactivated_plugins' );
 	$site_deactivated_plugins = array();
 
 	if ( false === $blog_deactivated_plugins ) {
 		// Option not in database, add an empty array to avoid extra DB queries on subsequent loads.
 		update_option( 'wp_force_deactivated_plugins', array() );
 	}
 
 	if ( is_multisite() ) {
 		$site_deactivated_plugins = get_site_option( 'wp_force_deactivated_plugins' );
 		if ( false === $site_deactivated_plugins ) {
 			// Option not in database, add an empty array to avoid extra DB queries on subsequent loads.
 			update_site_option( 'wp_force_deactivated_plugins', array() );
 		}
 	}
 
 	if ( empty( $blog_deactivated_plugins ) && empty( $site_deactivated_plugins ) ) {
 		// No deactivated plugins.
 		return;
 	}
 
 	$deactivated_plugins = array_merge( $blog_deactivated_plugins, $site_deactivated_plugins );
 
 	foreach ( $deactivated_plugins as $plugin ) {
 		if ( ! empty( $plugin['version_compatible'] ) && ! empty( $plugin['version_deactivated'] ) ) {
 			$explanation = sprintf(
 				/* translators: 1: Name of deactivated plugin, 2: Plugin version deactivated, 3: Current WP version, 4: Compatible plugin version */
 				__( '%1$s %2$s was deactivated due to incompatibility with WordPress %3$s, please upgrade to %1$s %4$s or later.' ),
 				$plugin['plugin_name'],
 				$plugin['version_deactivated'],
 				$GLOBALS['wp_version'],
 				$plugin['version_compatible']
 			);
 		} else {
 			$explanation = sprintf(
 				/* translators: 1: Name of deactivated plugin, 2: Plugin version deactivated, 3: Current WP version */
 				__( '%1$s %2$s was deactivated due to incompatibility with WordPress %3$s.' ),
 				$plugin['plugin_name'],
 				! empty( $plugin['version_deactivated'] ) ? $plugin['version_deactivated'] : '',
 				$GLOBALS['wp_version'],
 				$plugin['version_compatible']
 			);
 		}
 
 		printf(
 			'<div class="notice notice-warning"><p><strong>%s</strong><br>%s</p><p><a href="%s">%s</a></p></div>',
 			sprintf(
 				/* translators: %s: Name of deactivated plugin */
 				__( '%s plugin deactivated during WordPress upgrade.' ),
 				$plugin['plugin_name']
 			),
 			$explanation,
 			esc_url( admin_url( 'plugins.php?plugin_status=inactive' ) ),
 			__( 'Go to the Plugins screen' )
 		);
 	}
 
 	// Empty the options.
 	update_option( 'wp_force_deactivated_plugins', array() );
 	if ( is_multisite() ) {
 		update_site_option( 'wp_force_deactivated_plugins', array() );
 	}
 }