<?php
/**
 * Facilitates adding of the WordPress editor as used on the Write and Edit screens.
 *
 * @package WordPress
 * @since 3.3.0
 *
 * Private, not included by default. See wp_editor() in wp-includes/general-template.php.
 */

final class _WP_Editors {
	public static $mce_locale;

	private static $mce_settings = array();
	private static $qt_settings  = array();
	private static $plugins      = array();
	private static $qt_buttons   = array();
	private static $ext_plugins;
	private static $baseurl;
	private static $first_init;
	private static $this_tinymce       = false;
	private static $this_quicktags     = false;
	private static $has_tinymce        = false;
	private static $has_quicktags      = false;
	private static $has_medialib       = false;
	private static $editor_buttons_css = true;
	private static $drag_drop_upload   = false;
	private static $translation;
	private static $tinymce_scripts_printed = false;
	private static $link_dialog_printed     = false;

	private function __construct() {}

	/**
	 * Parse default arguments for the editor instance.
	 *
	 * @since 3.3.0
	 *
	 * @param string $editor_id HTML ID for the textarea and TinyMCE and Quicktags instances.
	 *                          Should not contain square brackets.
	 * @param array  $settings {
	 *     Array of editor arguments.
	 *
	 *     @type bool       $wpautop           Whether to use wpautop(). Default true.
	 *     @type bool       $media_buttons     Whether to show the Add Media/other media buttons.
	 *     @type string     $default_editor    When both TinyMCE and Quicktags are used, set which
	 *                                         editor is shown on page load. Default empty.
	 *     @type bool       $drag_drop_upload  Whether to enable drag & drop on the editor uploading. Default false.
	 *                                         Requires the media modal.
	 *     @type string     $textarea_name     Give the textarea a unique name here. Square brackets
	 *                                         can be used here. Default $editor_id.
	 *     @type int        $textarea_rows     Number rows in the editor textarea. Default 20.
	 *     @type string|int $tabindex          Tabindex value to use. Default empty.
	 *     @type string     $tabfocus_elements The previous and next element ID to move the focus to
	 *                                         when pressing the Tab key in TinyMCE. Default ':prev,:next'.
	 *     @type string     $editor_css        Intended for extra styles for both Visual and Text editors.
	 *                                         Should include `<style>` tags, and can use "scoped". Default empty.
	 *     @type string     $editor_class      Extra classes to add to the editor textarea element. Default empty.
	 *     @type bool       $teeny             Whether to output the minimal editor config. Examples include
	 *                                         Press This and the Comment editor. Default false.
	 *     @type bool       $dfw               Deprecated in 4.1. Unused.
	 *     @type bool|array $tinymce           Whether to load TinyMCE. Can be used to pass settings directly to
	 *                                         TinyMCE using an array. Default true.
	 *     @type bool|array $quicktags         Whether to load Quicktags. Can be used to pass settings directly to
	 *                                         Quicktags using an array. Default true.
	 * }
	 * @return array Parsed arguments array.
	 */
	public static function parse_settings( $editor_id, $settings ) {

		/**
		 * Filters the wp_editor() settings.
		 *
		 * @since 4.0.0
		 *
		 * @see _WP_Editors::parse_settings()
		 *
		 * @param array  $settings  Array of editor arguments.
		 * @param string $editor_id Unique editor identifier, e.g. 'content'. Accepts 'classic-block'
		 *                          when called from block editor's Classic block.
		 */
		$settings = apply_filters( 'wp_editor_settings', $settings, $editor_id );

		$set = wp_parse_args(
			$settings,
			array(
				// Disable autop if the current post has blocks in it.
				'wpautop'             => ! has_blocks(),
				'media_buttons'       => true,
				'default_editor'      => '',
				'drag_drop_upload'    => false,
				'textarea_name'       => $editor_id,
				'textarea_rows'       => 20,
				'tabindex'            => '',
				'tabfocus_elements'   => ':prev,:next',
				'editor_css'          => '',
				'editor_class'        => '',
				'teeny'               => false,
				'_content_editor_dfw' => false,
				'tinymce'             => true,
				'quicktags'           => true,
			)
		);

		self::$this_tinymce = ( $set['tinymce'] && user_can_richedit() );

		if ( self::$this_tinymce ) {
			if ( false !== strpos( $editor_id, '[' ) ) {
				self::$this_tinymce = false;
				_deprecated_argument( 'wp_editor()', '3.9.0', 'TinyMCE editor IDs cannot have brackets.' );
			}
		}

		self::$this_quicktags = (bool) $set['quicktags'];

		if ( self::$this_tinymce ) {
			self::$has_tinymce = true;
		}

		if ( self::$this_quicktags ) {
			self::$has_quicktags = true;
		}

		if ( empty( $set['editor_height'] ) ) {
			return $set;
		}

		if ( 'content' === $editor_id && empty( $set['tinymce']['wp_autoresize_on'] ) ) {
			// A cookie (set when a user resizes the editor) overrides the height.
			$cookie = (int) get_user_setting( 'ed_size' );

			if ( $cookie ) {
				$set['editor_height'] = $cookie;
			}
		}

		if ( $set['editor_height'] < 50 ) {
			$set['editor_height'] = 50;
		} elseif ( $set['editor_height'] > 5000 ) {
			$set['editor_height'] = 5000;
		}

		return $set;
	}

	/**
	 * Outputs the HTML for a single instance of the editor.
	 *
	 * @since 3.3.0
	 *
	 * @param string $content   Initial content for the editor.
	 * @param string $editor_id HTML ID for the textarea and TinyMCE and Quicktags instances.
	 *                          Should not contain square brackets.
	 * @param array  $settings  See _WP_Editors::parse_settings() for description.
	 */
	public static function editor( $content, $editor_id, $settings = array() ) {
		$set            = self::parse_settings( $editor_id, $settings );
		$editor_class   = ' class="' . trim( esc_attr( $set['editor_class'] ) . ' wp-editor-area' ) . '"';
		$tabindex       = $set['tabindex'] ? ' tabindex="' . (int) $set['tabindex'] . '"' : '';
		$default_editor = 'html';
		$buttons        = '';
		$autocomplete   = '';
		$editor_id_attr = esc_attr( $editor_id );

		if ( $set['drag_drop_upload'] ) {
			self::$drag_drop_upload = true;
		}

		if ( ! empty( $set['editor_height'] ) ) {
			$height = ' style="height: ' . (int) $set['editor_height'] . 'px"';
		} else {
			$height = ' rows="' . (int) $set['textarea_rows'] . '"';
		}

		if ( ! current_user_can( 'upload_files' ) ) {
			$set['media_buttons'] = false;
		}

		if ( self::$this_tinymce ) {
			$autocomplete = ' autocomplete="off"';

			if ( self::$this_quicktags ) {
				$default_editor = $set['default_editor'] ? $set['default_editor'] : wp_default_editor();
				// 'html' is used for the "Text" editor tab.
				if ( 'html' !== $default_editor ) {
					$default_editor = 'tinymce';
				}

				$buttons .= '<button type="button" id="' . $editor_id_attr . '-tmce" class="wp-switch-editor switch-tmce"' .
					' data-wp-editor-id="' . $editor_id_attr . '">' . _x( 'Visual', 'Name for the Visual editor tab' ) . "</button>\n";
				$buttons .= '<button type="button" id="' . $editor_id_attr . '-html" class="wp-switch-editor switch-html"' .
					' data-wp-editor-id="' . $editor_id_attr . '">' . _x( 'Text', 'Name for the Text editor tab (formerly HTML)' ) . "</button>\n";
			} else {
				$default_editor = 'tinymce';
			}
		}

		$switch_class = 'html' === $default_editor ? 'html-active' : 'tmce-active';
		$wrap_class   = 'wp-core-ui wp-editor-wrap ' . $switch_class;

		if ( $set['_content_editor_dfw'] ) {
			$wrap_class .= ' has-dfw';
		}

		echo '
';

		if ( self::$editor_buttons_css ) {
			wp_print_styles( 'editor-buttons' );
			self::$editor_buttons_css = false;
		}

		if ( ! empty( $set['editor_css'] ) ) {
			echo $set['editor_css'] . "\n";
		}

		if ( ! empty( $buttons ) || $set['media_buttons'] ) {
			echo '
';

			if ( $set['media_buttons'] ) {
				self::$has_medialib = true;

				if ( ! function_exists( 'media_buttons' ) ) {
					require ABSPATH . 'wp-admin/includes/media.php';
				}

				echo '
';

				/**
				 * Fires after the default media button(s) are displayed.
				 *
				 * @since 2.5.0
				 *
				 * @param string $editor_id Unique editor identifier, e.g. 'content'.
				 */
				do_action( 'media_buttons', $editor_id );
				echo "
\n";
			}

			echo '
' . $buttons . "
\n";
			echo "
\n";
		}

		$quicktags_toolbar = '';

		if ( self::$this_quicktags ) {
			if ( 'content' === $editor_id && ! empty( $GLOBALS['current_screen'] ) && 'post' === $GLOBALS['current_screen']->base ) {
				$toolbar_id = 'ed_toolbar';
			} else {
				$toolbar_id = 'qt_' . $editor_id_attr . '_toolbar';
			}

			$quicktags_toolbar = '

';
		}

		/**
		 * Filters the HTML markup output that displays the editor.
		 *
		 * @since 2.1.0
		 *
		 * @param string $output Editor's HTML markup.
		 */
		$the_editor = apply_filters(
			'the_editor',
			'
' .
			$quicktags_toolbar .
			'<textarea' . $editor_class . $height . $tabindex . $autocomplete . ' cols="40" name="' . esc_attr( $set['textarea_name'] ) . '" ' .
			'id="' . $editor_id_attr . '">%s</textarea>
'
		);

		// Prepare the content for the Visual or Text editor, only when TinyMCE is used (back-compat).
		if ( self::$this_tinymce ) {
			add_filter( 'the_editor_content', 'format_for_editor', 10, 2 );
		}

		/**
		 * Filters the default editor content.
		 *
		 * @since 2.1.0
		 *
		 * @param string $content        Default editor content.
		 * @param string $default_editor The default editor for the current user.
		 *                               Either 'html' or 'tinymce'.
		 */
		$content = apply_filters( 'the_editor_content', $content, $default_editor );

		// Remove the filter as the next editor on the same page may not need it.
		if ( self::$this_tinymce ) {
			remove_filter( 'the_editor_content', 'format_for_editor' );
		}

		// Back-compat for the `htmledit_pre` and `richedit_pre` filters.
		if ( 'html' === $default_editor && has_filter( 'htmledit_pre' ) ) {
			/** This filter is documented in wp-includes/deprecated.php */
			$content = apply_filters_deprecated( 'htmledit_pre', array( $content ), '4.3.0', 'format_for_editor' );
		} elseif ( 'tinymce' === $default_editor && has_filter( 'richedit_pre' ) ) {
			/** This filter is documented in wp-includes/deprecated.php */
			$content = apply_filters_deprecated( 'richedit_pre', array( $content ), '4.3.0', 'format_for_editor' );
		}

		if ( false !== stripos( $content, 'textarea' ) ) {
			$content = preg_replace( '%</textarea%i', '</textarea', $content );
		}

		printf( $the_editor, $content );
		echo "\n
\n\n";

		self::editor_settings( $editor_id, $set );
	}

	/**
	 * @since 3.3.0
	 *
	 * @param string $editor_id Unique editor identifier, e.g. 'content'.
	 * @param array  $set       Array of editor arguments.
	 */
	public static function editor_settings( $editor_id, $set ) {
		if ( empty( self::$first_init ) ) {
			if ( is_admin() ) {
				add_action( 'admin_print_footer_scripts', array( __CLASS__, 'editor_js' ), 50 );
				add_action( 'admin_print_footer_scripts', array( __CLASS__, 'force_uncompressed_tinymce' ), 1 );
				add_action( 'admin_print_footer_scripts', array( __CLASS__, 'enqueue_scripts' ), 1 );
			} else {
				add_action( 'wp_print_footer_scripts', array( __CLASS__, 'editor_js' ), 50 );
				add_action( 'wp_print_footer_scripts', array( __CLASS__, 'force_uncompressed_tinymce' ), 1 );
				add_action( 'wp_print_footer_scripts', array( __CLASS__, 'enqueue_scripts' ), 1 );
			}
		}

		if ( self::$this_quicktags ) {

			$qtInit = array(
				'id'      => $editor_id,
				'buttons' => '',
			);

			if ( is_array( $set['quicktags'] ) ) {
				$qtInit = array_merge( $qtInit, $set['quicktags'] );
			}

			if ( empty( $qtInit['buttons'] ) ) {
				$qtInit['buttons'] = 'strong,em,link,block,del,ins,img,ul,ol,li,code,more,close';
			}

			if ( $set['_content_editor_dfw'] ) {
				$qtInit['buttons'] .= ',dfw';
			}

			/**
			 * Filters the Quicktags settings.
			 *
			 * @since 3.3.0
			 *
			 * @param array  $qtInit    Quicktags settings.
			 * @param string $editor_id Unique editor identifier, e.g. 'content'.
			 */
			$qtInit = apply_filters( 'quicktags_settings', $qtInit, $editor_id );

			self::$qt_settings[ $editor_id ] = $qtInit;

			self::$qt_buttons = array_merge( self::$qt_buttons, explode( ',', $qtInit['buttons'] ) );
		}

		if ( self::$this_tinymce ) {

			if ( empty( self::$first_init ) ) {
				$baseurl     = self::get_baseurl();
				$mce_locale  = self::get_mce_locale();
				$ext_plugins = '';

				if ( $set['teeny'] ) {

					/**
					 * Filters the list of teenyMCE plugins.
					 *
					 * @since 2.7.0
					 * @since 3.3.0 The `$editor_id` parameter was added.
					 *
					 * @param array  $plugins   An array of teenyMCE plugins.
					 * @param string $editor_id Unique editor identifier, e.g. 'content'.
					 */
					$plugins = apply_filters(
						'teeny_mce_plugins',
						array(
							'colorpicker',
							'lists',
							'fullscreen',
							'image',
							'wordpress',
							'wpeditimage',
							'wplink',
						),
						$editor_id
					);
				} else {

					/**
					 * Filters the list of TinyMCE external plugins.
					 *
					 * The filter takes an associative array of external plugins for
					 * TinyMCE in the form 'plugin_name' => 'url'.
					 *
					 * The url should be absolute, and should include the js filename
					 * to be loaded. For example:
					 * 'myplugin' => 'http://mysite.com/wp-content/plugins/myfolder/mce_plugin.js'.
					 *
					 * If the external plugin adds a button, it should be added with
					 * one of the 'mce_buttons' filters.
					 *
					 * @since 2.5.0
					 * @since 5.3.0 The `$editor_id` parameter was added.
					 *
					 * @param array  $external_plugins An array of external TinyMCE plugins.
					 * @param string $editor_id        Unique editor identifier, e.g. 'content'. Accepts 'classic-block'
					 *                                 when called from block editor's Classic block.
					 */
					$mce_external_plugins = apply_filters( 'mce_external_plugins', array(), $editor_id );

					$plugins = array(
						'charmap',
						'colorpicker',
						'hr',
						'lists',
						'media',
						'paste',
						'tabfocus',
						'textcolor',
						'fullscreen',
						'wordpress',
						'wpautoresize',
						'wpeditimage',
						'wpemoji',
						'wpgallery',
						'wplink',
						'wpdialogs',
						'wptextpattern',
						'wpview',
					);

					if ( ! self::$has_medialib ) {
						$plugins[] = 'image';
					}

					/**
					 * Filters the list of default TinyMCE plugins.
					 *
					 * The filter specifies which of the default plugins included
					 * in WordPress should be added to the TinyMCE instance.
					 *
					 * @since 3.3.0
					 * @since 5.3.0 The `$editor_id` parameter was added.
					 *
					 * @param array  $plugins   An array of default TinyMCE plugins.
					 * @param string $editor_id Unique editor identifier, e.g. 'content'. Accepts 'classic-block'
					 *                          when called from block editor's Classic block.
					 */
					$plugins = array_unique( apply_filters( 'tiny_mce_plugins', $plugins, $editor_id ) );

					$key = array_search( 'spellchecker', $plugins, true );
					if ( false !== $key ) {
						// Remove 'spellchecker' from the internal plugins if added with 'tiny_mce_plugins' filter to prevent errors.
						// It can be added with 'mce_external_plugins'.
						unset( $plugins[ $key ] );
					}

					if ( ! empty( $mce_external_plugins ) ) {

						/**
						 * Filters the translations loaded for external TinyMCE 3.x plugins.
						 *
						 * The filter takes an associative array ('plugin_name' => 'path')
						 * where 'path' is the include path to the file.
						 *
						 * The language file should follow the same format as wp_mce_translation(),
						 * and should define a variable ($strings) that holds all translated strings.
						 *
						 * @since 2.5.0
						 * @since 5.3.0 The `$editor_id` parameter was added.
						 *
						 * @param array  $translations Translations for external TinyMCE plugins.
						 * @param string $editor_id    Unique editor identifier, e.g. 'content'.
						 */
						$mce_external_languages = apply_filters( 'mce_external_languages', array(), $editor_id );

						$loaded_langs = array();
						$strings      = '';

						if ( ! empty( $mce_external_languages ) ) {
							foreach ( $mce_external_languages as $name => $path ) {
								if ( @is_file( $path ) && @is_readable( $path ) ) {
									include_once $path;
									$ext_plugins   .= $strings . "\n";
									$loaded_langs[] = $name;
								}
							}
						}

						foreach ( $mce_external_plugins as $name => $url ) {
							if ( in_array( $name, $plugins, true ) ) {
								unset( $mce_external_plugins[ $name ] );
								continue;
							}

							$url                           = set_url_scheme( $url );
							$mce_external_plugins[ $name ] = $url;
							$plugurl                       = dirname( $url );
							$strings                       = '';

							// Try to load langs/[locale].js and langs/[locale]_dlg.js.
							if ( ! in_array( $name, $loaded_langs, true ) ) {
								$path = str_replace( content_url(), '', $plugurl );
								$path = WP_CONTENT_DIR . $path . '/langs/';

								$path = trailingslashit( realpath( $path ) );

								if ( @is_file( $path . $mce_locale . '.js' ) ) {
									$strings .= @file_get_contents( $path . $mce_locale . '.js' ) . "\n";
								}

								if ( @is_file( $path . $mce_locale . '_dlg.js' ) ) {
									$strings .= @file_get_contents( $path . $mce_locale . '_dlg.js' ) . "\n";
								}

								if ( 'en' !== $mce_locale && empty( $strings ) ) {
									if ( @is_file( $path . 'en.js' ) ) {
										$str1     = @file_get_contents( $path . 'en.js' );
										$strings .= preg_replace( '/([\'"])en\./', '$1' . $mce_locale . '.', $str1, 1 ) . "\n";
									}

									if ( @is_file( $path . 'en_dlg.js' ) ) {
										$str2     = @file_get_contents( $path . 'en_dlg.js' );
										$strings .= preg_replace( '/([\'"])en\./', '$1' . $mce_locale . '.', $str2, 1 ) . "\n";
									}
								}

								if ( ! empty( $strings ) ) {
									$ext_plugins .= "\n" . $strings . "\n";
								}
							}

							$ext_plugins .= 'tinyMCEPreInit.load_ext("' . $plugurl . '", "' . $mce_locale . '");' . "\n";
						}
					}
				}

				self::$plugins     = $plugins;
				self::$ext_plugins = $ext_plugins;

				$settings            = self::default_settings();
				$settings['plugins'] = implode( ',', $plugins );

				if ( ! empty( $mce_external_plugins ) ) {
					$settings['external_plugins'] = wp_json_encode( $mce_external_plugins );
				}

				/** This filter is documented in wp-admin/includes/media.php */
				if ( apply_filters( 'disable_captions', '' ) ) {
					$settings['wpeditimage_disable_captions'] = true;
				}

				$mce_css = $settings['content_css'];

				/*
				 * The `editor-style.css` added by the theme is generally intended for the editor instance on the Edit Post screen.
				 * Plugins that use wp_editor() on the front-end can decide whether to add the theme stylesheet
				 * by using `get_editor_stylesheets()` and the `mce_css` or `tiny_mce_before_init` filters, see below.
				 */
				if ( is_admin() ) {
					$editor_styles = get_editor_stylesheets();

					if ( ! empty( $editor_styles ) ) {
						// Force urlencoding of commas.
						foreach ( $editor_styles as $key => $url ) {
							if ( strpos( $url, ',' ) !== false ) {
								$editor_styles[ $key ] = str_replace( ',', '%2C', $url );
							}
						}

						$mce_css .= ',' . implode( ',', $editor_styles );
					}
				}

				/**
				 * Filters the comma-delimited list of stylesheets to load in TinyMCE.
				 *
				 * @since 2.1.0
				 *
				 * @param string $stylesheets Comma-delimited list of stylesheets.
				 */
				$mce_css = trim( apply_filters( 'mce_css', $mce_css ), ' ,' );

				if ( ! empty( $mce_css ) ) {
					$settings['content_css'] = $mce_css;
				} else {
					unset( $settings['content_css'] );
				}

				self::$first_init = $settings;
			}

			if ( $set['teeny'] ) {
				$mce_buttons = array(
					'bold',
					'italic',
					'underline',
					'blockquote',
					'strikethrough',
					'bullist',
					'numlist',
					'alignleft',
					'aligncenter',
					'alignright',
					'undo',
					'redo',
					'link',
					'fullscreen',
				);

				/**
				 * Filters the list of teenyMCE buttons (Text tab).
				 *
				 * @since 2.7.0
				 * @since 3.3.0 The `$editor_id` parameter was added.
				 *
				 * @param array  $mce_buttons An array of teenyMCE buttons.
				 * @param string $editor_id   Unique editor identifier, e.g. 'content'.
				 */
				$mce_buttons   = apply_filters( 'teeny_mce_buttons', $mce_buttons, $editor_id );
				$mce_buttons_2 = array();
				$mce_buttons_3 = array();
				$mce_buttons_4 = array();
			} else {
				$mce_buttons = array(
					'formatselect',
					'bold',
					'italic',
					'bullist',
					'numlist',
					'blockquote',
					'alignleft',
					'aligncenter',
					'alignright',
					'link',
					'wp_more',
					'spellchecker',
				);

				if ( ! wp_is_mobile() ) {
					if ( $set['_content_editor_dfw'] ) {
						$mce_buttons[] = 'wp_adv';
						$mce_buttons[] = 'dfw';
					} else {
						$mce_buttons[] = 'fullscreen';
						$mce_buttons[] = 'wp_adv';
					}
				} else {
					$mce_buttons[] = 'wp_adv';
				}

				/**
				 * Filters the first-row list of TinyMCE buttons (Visual tab).
				 *
				 * @since 2.0.0
				 * @since 3.3.0 The `$editor_id` parameter was added.
				 *
				 * @param array  $mce_buttons First-row list of buttons.
				 * @param string $editor_id   Unique editor identifier, e.g. 'content'. Accepts 'classic-block'
				 *                            when called from block editor's Classic block.
				 */
				$mce_buttons = apply_filters( 'mce_buttons', $mce_buttons, $editor_id );

				$mce_buttons_2 = array(
					'strikethrough',
					'hr',
					'forecolor',
					'pastetext',
					'removeformat',
					'charmap',
					'outdent',
					'indent',
					'undo',
					'redo',
				);

				if ( ! wp_is_mobile() ) {
					$mce_buttons_2[] = 'wp_help';
				}

				/**
				 * Filters the second-row list of TinyMCE buttons (Visual tab).
				 *
				 * @since 2.0.0
				 * @since 3.3.0 The `$editor_id` parameter was added.
				 *
				 * @param array  $mce_buttons_2 Second-row list of buttons.
				 * @param string $editor_id     Unique editor identifier, e.g. 'content'. Accepts 'classic-block'
				 *                              when called from block editor's Classic block.
				 */
				$mce_buttons_2 = apply_filters( 'mce_buttons_2', $mce_buttons_2, $editor_id );

				/**
				 * Filters the third-row list of TinyMCE buttons (Visual tab).
				 *
				 * @since 2.0.0
				 * @since 3.3.0 The `$editor_id` parameter was added.
				 *
				 * @param array  $mce_buttons_3 Third-row list of buttons.
				 * @param string $editor_id     Unique editor identifier, e.g. 'content'. Accepts 'classic-block'
				 *                              when called from block editor's Classic block.
				 */
				$mce_buttons_3 = apply_filters( 'mce_buttons_3', array(), $editor_id );

				/**
				 * Filters the fourth-row list of TinyMCE buttons (Visual tab).
				 *
				 * @since 2.5.0
				 * @since 3.3.0 The `$editor_id` parameter was added.
				 *
				 * @param array  $mce_buttons_4 Fourth-row list of buttons.
				 * @param string $editor_id     Unique editor identifier, e.g. 'content'. Accepts 'classic-block'
				 *                              when called from block editor's Classic block.
				 */
				$mce_buttons_4 = apply_filters( 'mce_buttons_4', array(), $editor_id );
			}

			$body_class = $editor_id;

			$post = get_post();
			if ( $post ) {
				$body_class .= ' post-type-' . sanitize_html_class( $post->post_type ) . ' post-status-' . sanitize_html_class( $post->post_status );

				if ( post_type_supports( $post->post_type, 'post-formats' ) ) {
					$post_format = get_post_format( $post );
					if ( $post_format && ! is_wp_error( $post_format ) ) {
						$body_class .= ' post-format-' . sanitize_html_class( $post_format );
					} else {
						$body_class .= ' post-format-standard';
					}
				}

				$page_template = get_page_template_slug( $post );

				if ( false !== $page_template ) {
					$page_template = empty( $page_template ) ? 'default' : str_replace( '.', '-', basename( $page_template, '.php' ) );
					$body_class   .= ' page-template-' . sanitize_html_class( $page_template );
				}
			}

			$body_class .= ' locale-' . sanitize_html_class( strtolower( str_replace( '_', '-', get_user_locale() ) ) );

			if ( ! empty( $set['tinymce']['body_class'] ) ) {
				$body_class .= ' ' . $set['tinymce']['body_class'];
				unset( $set['tinymce']['body_class'] );
			}

			$mceInit = array(
				'selector'          => "#$editor_id",
				'wpautop'           => (bool) $set['wpautop'],
				'indent'            => ! $set['wpautop'],
				'toolbar1'          => implode( ',', $mce_buttons ),
				'toolbar2'          => implode( ',', $mce_buttons_2 ),
				'toolbar3'          => implode( ',', $mce_buttons_3 ),
				'toolbar4'          => implode( ',', $mce_buttons_4 ),
				'tabfocus_elements' => $set['tabfocus_elements'],
				'body_class'        => $body_class,
			);

			// Merge with the first part of the init array.
			$mceInit = array_merge( self::$first_init, $mceInit );

			if ( is_array( $set['tinymce'] ) ) {
				$mceInit = array_merge( $mceInit, $set['tinymce'] );
			}

			/*
			 * For people who really REALLY know what they're doing with TinyMCE
			 * You can modify $mceInit to add, remove, change elements of the config
			 * before tinyMCE.init. Setting "valid_elements", "invalid_elements"
			 * and "extended_valid_elements" can be done through this filter. Best
			 * is to use the default cleanup by not specifying valid_elements,
			 * as TinyMCE checks against the full set of HTML 5.0 elements and attributes.
			 */
			if ( $set['teeny'] ) {

				/**
				 * Filters the teenyMCE config before init.
				 *
				 * @since 2.7.0
				 * @since 3.3.0 The `$editor_id` parameter was added.
				 *
				 * @param array  $mceInit   An array with teenyMCE config.
				 * @param string $editor_id Unique editor identifier, e.g. 'content'.
				 */
				$mceInit = apply_filters( 'teeny_mce_before_init', $mceInit, $editor_id );
			} else {

				/**
				 * Filters the TinyMCE config before init.
				 *
				 * @since 2.5.0
				 * @since 3.3.0 The `$editor_id` parameter was added.
				 *
				 * @param array  $mceInit   An array with TinyMCE config.
				 * @param string $editor_id Unique editor identifier, e.g. 'content'. Accepts 'classic-block'
				 *                          when called from block editor's Classic block.
				 */
				$mceInit = apply_filters( 'tiny_mce_before_init', $mceInit, $editor_id );
			}

			if ( empty( $mceInit['toolbar3'] ) && ! empty( $mceInit['toolbar4'] ) ) {
				$mceInit['toolbar3'] = $mceInit['toolbar4'];
				$mceInit['toolbar4'] = '';
			}

			self::$mce_settings[ $editor_id ] = $mceInit;
		} // End if self::$this_tinymce.
	}

	/**
	 * @since 3.3.0
	 *
	 * @param array $init
	 * @return string
	 */
	private static function _parse_init( $init ) {
		$options = '';

		foreach ( $init as $key => $value ) {
			if ( is_bool( $value ) ) {
				$val      = $value ? 'true' : 'false';
				$options .= $key . ':' . $val . ',';
				continue;
			} elseif ( ! empty( $value ) && is_string( $value ) && (
				( '{' === $value[0] && '}' === $value[ strlen( $value ) - 1 ] ) ||
				( '[' === $value[0] && ']' === $value[ strlen( $value ) - 1 ] ) ||
				preg_match( '/^\(?function ?\(/', $value ) ) ) {

				$options .= $key . ':' . $value . ',';
				continue;
			}
			$options .= $key . ':"' . $value . '",';
		}

		return '{' . trim( $options, ' ,' ) . '}';
	}

	/**
	 * @since 3.3.0
	 *
	 * @param bool $default_scripts Optional. Whether default scripts should be enqueued. Default false.
	 */
	public static function enqueue_scripts( $default_scripts = false ) {
		if ( $default_scripts || self::$has_tinymce ) {
			wp_enqueue_script( 'editor' );
		}

		if ( $default_scripts || self::$has_quicktags ) {
			wp_enqueue_script( 'quicktags' );
			wp_enqueue_style( 'buttons' );
		}

		if ( $default_scripts || in_array( 'wplink', self::$plugins, true ) || in_array( 'link', self::$qt_buttons, true ) ) {
			wp_enqueue_script( 'wplink' );
			wp_enqueue_script( 'jquery-ui-autocomplete' );
		}

		if ( self::$has_medialib ) {
			add_thickbox();
			wp_enqueue_script( 'media-upload' );
			wp_enqueue_script( 'wp-embed' );
		} elseif ( $default_scripts ) {
			wp_enqueue_script( 'media-upload' );
		}

		/**
		 * Fires when scripts and styles are enqueued for the editor.
		 *
		 * @since 3.9.0
		 *
		 * @param array $to_load An array containing boolean values whether TinyMCE
		 *                       and Quicktags are being loaded.
		 */
		do_action(
			'wp_enqueue_editor',
			array(
				'tinymce'   => ( $default_scripts || self::$has_tinymce ),
				'quicktags' => ( $default_scripts || self::$has_quicktags ),
			)
		);
	}

	/**
	 * Enqueue all editor scripts.
	 * For use when the editor is going to be initialized after page load.
	 *
	 * @since 4.8.0
	 */
	public static function enqueue_default_editor() {
		// We are past the point where scripts can be enqueued properly.
		if ( did_action( 'wp_enqueue_editor' ) ) {
			return;
		}

		self::enqueue_scripts( true );

		// Also add wp-includes/css/editor.css.
		wp_enqueue_style( 'editor-buttons' );

		if ( is_admin() ) {
			add_action( 'admin_print_footer_scripts', array( __CLASS__, 'force_uncompressed_tinymce' ), 1 );
			add_action( 'admin_print_footer_scripts', array( __CLASS__, 'print_default_editor_scripts' ), 45 );
		} else {
			add_action( 'wp_print_footer_scripts', array( __CLASS__, 'force_uncompressed_tinymce' ), 1 );
			add_action( 'wp_print_footer_scripts', array( __CLASS__, 'print_default_editor_scripts' ), 45 );
		}
	}

	/**
	 * Print (output) all editor scripts and default settings.
	 * For use when the editor is going to be initialized after page load.
	 *
	 * @since 4.8.0
	 */
	public static function print_default_editor_scripts() {
		$user_can_richedit = user_can_richedit();

		if ( $user_can_richedit ) {
			$settings = self::default_settings();

			$settings['toolbar1']    = 'bold,italic,bullist,numlist,link';
			$settings['wpautop']     = false;
			$settings['indent']      = true;
			$settings['elementpath'] = false;

			if ( is_rtl() ) {
				$settings['directionality'] = 'rtl';
			}

			/*
			 * In production all plugins are loaded (they are in wp-editor.js.gz).
			 * The 'wpview', 'wpdialogs', and 'media' TinyMCE plugins are not initialized by default.
			 * Can be added from js by using the 'wp-before-tinymce-init' event.
			 */
			$settings['plugins'] = implode(
				',',
				array(
					'charmap',
					'colorpicker',
					'hr',
					'lists',
					'paste',
					'tabfocus',
					'textcolor',
					'fullscreen',
					'wordpress',
					'wpautoresize',
					'wpeditimage',
					'wpemoji',
					'wpgallery',
					'wplink',
					'wptextpattern',
				)
			);

			$settings = self::_parse_init( $settings );
		} else {
			$settings = '{}';
		}

		?>

		<?php

		if ( $user_can_richedit ) {
			self::print_tinymce_scripts();
		}

		/**
		 * Fires when the editor scripts are loaded for later initialization,
		 * after all scripts and settings are printed.
		 *
		 * @since 4.8.0
		 */
		do_action( 'print_default_editor_scripts' );

		self::wp_link_dialog();
	}

	/**
	 * Returns the TinyMCE locale.
	 *
	 * @since 4.8.0
	 *
	 * @return string
	 */
	public static function get_mce_locale() {
		if ( empty( self::$mce_locale ) ) {
			$mce_locale       = get_user_locale();
			self::$mce_locale = empty( $mce_locale ) ? 'en' : strtolower( substr( $mce_locale, 0, 2 ) ); // ISO 639-1.
		}

		return self::$mce_locale;
	}

	/**
	 * Returns the TinyMCE base URL.
	 *
	 * @since 4.8.0
	 *
	 * @return string
	 */
	public static function get_baseurl() {
		if ( empty( self::$baseurl ) ) {
			self::$baseurl = includes_url( 'js/tinymce' );
		}

		return self::$baseurl;
	}

	/**
	 * Returns the default TinyMCE settings.
	 * Doesn't include plugins, buttons, editor selector.
	 *
	 * @since 4.8.0
	 *
	 * @global string $tinymce_version
	 *
	 * @return array
	 */
	private static function default_settings() {
		global $tinymce_version;

		$shortcut_labels = array();

		foreach ( self::get_translation() as $name => $value ) {
			if ( is_array( $value ) ) {
				$shortcut_labels[ $name ] = $value[1];
			}
		}

		$settings = array(
			'theme'                        => 'modern',
			'skin'                         => 'lightgray',
			'language'                     => self::get_mce_locale(),
			'formats'                      => '{' .
				'alignleft: [' .
					'{selector: "p,h1,h2,h3,h4,h5,h6,td,th,div,ul,ol,li", styles: {textAlign:"left"}},' .
					'{selector: "img,table,dl.wp-caption", classes: "alignleft"}' .
				'],' .
				'aligncenter: [' .
					'{selector: "p,h1,h2,h3,h4,h5,h6,td,th,div,ul,ol,li", styles: {textAlign:"center"}},' .
					'{selector: "img,table,dl.wp-caption", classes: "aligncenter"}' .
				'],' .
				'alignright: [' .
					'{selector: "p,h1,h2,h3,h4,h5,h6,td,th,div,ul,ol,li", styles: {textAlign:"right"}},' .
					'{selector: "img,table,dl.wp-caption", classes: "alignright"}' .
				'],' .
				'strikethrough: {inline: "del"}' .
			'}',
			'relative_urls'                => false,
			'remove_script_host'           => false,
			'convert_urls'                 => false,
			'browser_spellcheck'           => true,
			'fix_list_elements'            => true,
			'entities'                     => '38,amp,60,lt,62,gt',
			'entity_encoding'              => 'raw',
			'keep_styles'                  => false,
			'cache_suffix'                 => 'wp-mce-' . $tinymce_version,
			'resize'                       => 'vertical',
			'menubar'                      => false,
			'branding'                     => false,

			// Limit the preview styles in the menu/toolbar.
			'preview_styles'               => 'font-family font-size font-weight font-style text-decoration text-transform',

			'end_container_on_empty_block' => true,
			'wpeditimage_html5_captions'   => true,
			'wp_lang_attr'                 => get_bloginfo( 'language' ),
			'wp_keep_scroll_position'      => false,
			'wp_shortcut_labels'           => wp_json_encode( $shortcut_labels ),
		);

		$suffix  = SCRIPT_DEBUG ? '' : '.min';
		$version = 'ver=' . get_bloginfo( 'version' );

		// Default stylesheets.
		$settings['content_css'] = includes_url( "css/dashicons$suffix.css?$version" ) . ',' .
			includes_url( "js/tinymce/skins/wordpress/wp-content.css?$version" );

		return $settings;
	}

	/**
	 * @since 4.7.0
	 *
	 * @return array
	 */
	private static function get_translation() {
		if ( empty( self::$translation ) ) {
			self::$translation = array(
				// Default TinyMCE strings.
				'New document'                         => __( 'New document' ),
				'Formats'                              => _x( 'Formats', 'TinyMCE' ),

				'Headings'                             => _x( 'Headings', 'TinyMCE' ),
				'Heading 1'                            => array( __( 'Heading 1' ), 'access1' ),
				'Heading 2'                            => array( __( 'Heading 2' ), 'access2' ),
				'Heading 3'                            => array( __( 'Heading 3' ), 'access3' ),
				'Heading 4'                            => array( __( 'Heading 4' ), 'access4' ),
				'Heading 5'                            => array( __( 'Heading 5' ), 'access5' ),
				'Heading 6'                            => array( __( 'Heading 6' ), 'access6' ),

				/* translators: Block tags. */
				'Blocks'                               => _x( 'Blocks', 'TinyMCE' ),
				'Paragraph'                            => array( __( 'Paragraph' ), 'access7' ),
				'Blockquote'                           => array( __( 'Blockquote' ), 'accessQ' ),
				'Div'                                  => _x( 'Div', 'HTML tag' ),
				'Pre'                                  => _x( 'Pre', 'HTML tag' ),
				'Preformatted'                         => _x( 'Preformatted', 'HTML tag' ),
				'Address'                              => _x( 'Address', 'HTML tag' ),

				'Inline'                               => _x( 'Inline', 'HTML elements' ),
				'Underline'                            => array( __( 'Underline' ), 'metaU' ),
				'Strikethrough'                        => array( __( 'Strikethrough' ), 'accessD' ),
				'Subscript'                            => __( 'Subscript' ),
				'Superscript'                          => __( 'Superscript' ),
				'Clear formatting'                     => __( 'Clear formatting' ),
				'Bold'                                 => array( __( 'Bold' ), 'metaB' ),
				'Italic'                               => array( __( 'Italic' ), 'metaI' ),
				'Code'                                 => array( __( 'Code' ), 'accessX' ),
				'Source code'                          => __( 'Source code' ),
				'Font Family'                          => __( 'Font Family' ),
				'Font Sizes'                           => __( 'Font Sizes' ),

				'Align center'                         => array( __( 'Align center' ), 'accessC' ),
				'Align right'                          => array( __( 'Align right' ), 'accessR' ),
				'Align left'                           => array( __( 'Align left' ), 'accessL' ),
				'Justify'                              => array( __( 'Justify' ), 'accessJ' ),
				'Increase indent'                      => __( 'Increase indent' ),
				'Decrease indent'                      => __( 'Decrease indent' ),

				'Cut'                                  => array( __( 'Cut' ), 'metaX' ),
				'Copy'                                 => array( __( 'Copy' ), 'metaC' ),
				'Paste'                                => array( __( 'Paste' ), 'metaV' ),
				'Select all'                           => array( __( 'Select all' ), 'metaA' ),
				'Undo'                                 => array( __( 'Undo' ), 'metaZ' ),
				'Redo'                                 => array( __( 'Redo' ), 'metaY' ),

				'Ok'                                   => __( 'OK' ),
				'Cancel'                               => __( 'Cancel' ),
				'Close'                                => __( 'Close' ),
				'Visual aids'                          => __( 'Visual aids' ),

				'Bullet list'                          => array( __( 'Bulleted list' ), 'accessU' ),
				'Numbered list'                        => array( __( 'Numbered list' ), 'accessO' ),
				'Square'                               => _x( 'Square', 'list style' ),
				'Default'                              => _x( 'Default', 'list style' ),
				'Circle'                               => _x( 'Circle', 'list style' ),
				'Disc'                                 => _x( 'Disc', 'list style' ),
				'Lower Greek'                          => _x( 'Lower Greek', 'list style' ),
				'Lower Alpha'                          => _x( 'Lower Alpha', 'list style' ),
				'Upper Alpha'                          => _x( 'Upper Alpha', 'list style' ),
				'Upper Roman'                          => _x( 'Upper Roman', 'list style' ),
				'Lower Roman'                          => _x( 'Lower Roman', 'list style' ),

				// Anchor plugin.
				'Name'                                 => _x( 'Name', 'Name of link anchor (TinyMCE)' ),
				'Anchor'                               => _x( 'Anchor', 'Link anchor (TinyMCE)' ),
				'Anchors'                              => _x( 'Anchors', 'Link anchors (TinyMCE)' ),
				'Id should start with a letter, followed only by letters, numbers, dashes, dots, colons or underscores.' =>
					__( 'Id should start with a letter, followed only by letters, numbers, dashes, dots, colons or underscores.' ),
				'Id'                                   => _x( 'Id', 'Id for link anchor (TinyMCE)' ),

				// Fullpage plugin.
				'Document properties'                  => __( 'Document properties' ),
				'Robots'                               => __( 'Robots' ),
				'Title'                                => __( 'Title' ),
				'Keywords'                             => __( 'Keywords' ),
				'Encoding'                             => __( 'Encoding' ),
				'Description'                          => __( 'Description' ),
				'Author'                               => __( 'Author' ),

				// Media, image plugins.
				'Image'                                => __( 'Image' ),
				'Insert/edit image'                    => array( __( 'Insert/edit image' ), 'accessM' ),
				'General'                              => __( 'General' ),
				'Advanced'                             => __( 'Advanced' ),
				'Source'                               => __( 'Source' ),
				'Border'                               => __( 'Border' ),
				'Constrain proportions'                => __( 'Constrain proportions' ),
				'Vertical space'                       => __( 'Vertical space' ),
				'Image description'                    => __( 'Image description' ),
				'Style'                                => __( 'Style' ),
				'Dimensions'                           => __( 'Dimensions' ),
				'Insert image'                         => __( 'Insert image' ),
				'Date/time'                            => __( 'Date/time' ),
				'Insert date/time'                     => __( 'Insert date/time' ),
				'Table of Contents'                    => __( 'Table of Contents' ),
				'Insert/Edit code sample'              => __( 'Insert/edit code sample' ),
				'Language'                             => __( 'Language' ),
				'Media'                                => __( 'Media' ),
				'Insert/edit media'                    => __( 'Insert/edit media' ),
				'Poster'                               => __( 'Poster' ),
				'Alternative source'                   => __( 'Alternative source' ),
				'Paste your embed code below:'         => __( 'Paste your embed code below:' ),
				'Insert video'                         => __( 'Insert video' ),
				'Embed'                                => __( 'Embed' ),

				// Each of these have a corresponding plugin.
				'Special character'                    => __( 'Special character' ),
				'Right to left'                        => _x( 'Right to left', 'editor button' ),
				'Left to right'                        => _x( 'Left to right', 'editor button' ),
				'Emoticons'                            => __( 'Emoticons' ),
				'Nonbreaking space'                    => __( 'Nonbreaking space' ),
				'Page break'                           => __( 'Page break' ),
				'Paste as text'                        => __( 'Paste as text' ),
				'Preview'                              => __( 'Preview' ),
				'Print'                                => __( 'Print' ),
				'Save'                                 => __( 'Save' ),
				'Fullscreen'                           => __( 'Fullscreen' ),
				'Horizontal line'                      => __( 'Horizontal line' ),
				'Horizontal space'                     => __( 'Horizontal space' ),
				'Restore last draft'                   => __( 'Restore last draft' ),
				'Insert/edit link'                     => array( __( 'Insert/edit link' ), 'metaK' ),
				'Remove link'                          => array( __( 'Remove link' ), 'accessS' ),

				// Link plugin.
				'Link'                                 => __( 'Link' ),
				'Insert link'                          => __( 'Insert link' ),
				'Target'                               => __( 'Target' ),
				'New window'                           => __( 'New window' ),
				'Text to display'                      => __( 'Text to display' ),
				'Url'                                  => __( 'URL' ),
				'The URL you entered seems to be an email address. Do you want to add the required mailto: prefix?' =>
					__( 'The URL you entered seems to be an email address. Do you want to add the required mailto: prefix?' ),
				'The URL you entered seems to be an external link. Do you want to add the required http:// prefix?' =>
					__( 'The URL you entered seems to be an external link. Do you want to add the required http:// prefix?' ),

				'Color'                                => __( 'Color' ),
				'Custom color'                         => __( 'Custom color' ),
				'Custom...'                            => _x( 'Custom...', 'label for custom color' ), // No ellipsis.
				'No color'                             => __( 'No color' ),
				'R'                                    => _x( 'R', 'Short for red in RGB' ),
				'G'                                    => _x( 'G', 'Short for green in RGB' ),
				'B'                                    => _x( 'B', 'Short for blue in RGB' ),

				// Spelling, search/replace plugins.
				'Could not find the specified string.' => __( 'Could not find the specified string.' ),
				'Replace'                              => _x( 'Replace', 'find/replace' ),
				'Next'                                 => _x( 'Next', 'find/replace' ),
				/* translators: Previous. */
				'Prev'                                 => _x( 'Prev', 'find/replace' ),
				'Whole words'                          => _x( 'Whole words', 'find/replace' ),
				'Find and replace'                     => __( 'Find and replace' ),
				'Replace with'                         => _x( 'Replace with', 'find/replace' ),
				'Find'                                 => _x( 'Find', 'find/replace' ),
				'Replace all'                          => _x( 'Replace all', 'find/replace' ),
				'Match case'                           => __( 'Match case' ),
				'Spellcheck'                           => __( 'Check Spelling' ),
				'Finish'                               => _x( 'Finish', 'spellcheck' ),
				'Ignore all'                           => _x( 'Ignore all', 'spellcheck' ),
				'Ignore'                               => _x( 'Ignore', 'spellcheck' ),
				'Add to Dictionary'                    => __( 'Add to Dictionary' ),

				// TinyMCE tables.
				'Insert table'                         => __( 'Insert table' ),
				'Delete table'                         => __( 'Delete table' ),
				'Table properties'                     => __( 'Table properties' ),
				'Row properties'                       => __( 'Table row properties' ),
				'Cell properties'                      => __( 'Table cell properties' ),
				'Border color'                         => __( 'Border color' ),

				'Row'                                  => __( 'Row' ),
				'Rows'                                 => __( 'Rows' ),
				'Column'                               => _x( 'Column', 'table column' ),
				'Cols'                                 => _x( 'Cols', 'table columns' ),
				'Cell'                                 => _x( 'Cell', 'table cell' ),
				'Header cell'                          => __( 'Header cell' ),
				'Header'                               => _x( 'Header', 'table header' ),
				'Body'                                 => _x( 'Body', 'table body' ),
				'Footer'                               => _x( 'Footer', 'table footer' ),

				'Insert row before'                    => __( 'Insert row before' ),
				'Insert row after'                     => __( 'Insert row after' ),
				'Insert column before'                 => __( 'Insert column before' ),
				'Insert column after'                  => __( 'Insert column after' ),
				'Paste row before'                     => __( 'Paste table row before' ),
				'Paste row after'                      => __( 'Paste table row after' ),
				'Delete row'                           => __( 'Delete row' ),
				'Delete column'                        => __( 'Delete column' ),
				'Cut row'                              => __( 'Cut table row' ),
				'Copy row'                             => __( 'Copy table row' ),
				'Merge cells'                          => __( 'Merge table cells' ),
				'Split cell'                           => __( 'Split table cell' ),

				'Height'                               => __( 'Height' ),
				'Width'                                => __( 'Width' ),
				'Caption'                              => __( 'Caption' ),
				'Alignment'                            => __( 'Alignment' ),
				'H Align'                              => _x( 'H Align', 'horizontal table cell alignment' ),
				'Left'                                 => __( 'Left' ),
				'Center'                               => __( 'Center' ),
				'Right'                                => __( 'Right' ),
				'None'                                 => _x( 'None', 'table cell alignment attribute' ),
				'V Align'                              => _x( 'V Align', 'vertical table cell alignment' ),
				'Top'                                  => __( 'Top' ),
				'Middle'                               => __( 'Middle' ),
				'Bottom'                               => __( 'Bottom' ),

				'Row group'                            => __( 'Row group' ),
				'Column group'                         => __( 'Column group' ),
				'Row type'                             => __( 'Row type' ),
				'Cell type'                            => __( 'Cell type' ),
				'Cell padding'                         => __( 'Cell padding' ),
				'Cell spacing'                         => __( 'Cell spacing' ),
				'Scope'                                => _x( 'Scope', 'table cell scope attribute' ),

				'Insert template'                      => _x( 'Insert template', 'TinyMCE' ),
				'Templates'                            => _x( 'Templates', 'TinyMCE' ),

				'Background color'                     => __( 'Background color' ),
				'Text color'                           => __( 'Text color' ),
				'Show blocks'                          => _x( 'Show blocks', 'editor button' ),
				'Show invisible characters'            => __( 'Show invisible characters' ),

				/* translators: Word count. */
				'Words: {0}'                           => sprintf( __( 'Words: %s' ), '{0}' ),
				'Paste is now in plain text mode. Contents will now be pasted as plain text until you toggle this option off.' =>
					__( 'Paste is now in plain text mode. Contents will now be pasted as plain text until you toggle this option off.' ) . "\n\n" .
					__( 'If you’re looking to paste rich content from Microsoft Word, try turning this option off. The editor will clean up text pasted from Word automatically.' ),
				'Rich Text Area. Press ALT-F9 for menu. Press ALT-F10 for toolbar. Press ALT-0 for help' =>
					__( 'Rich Text Area. Press Alt-Shift-H for help.' ),
				'Rich Text Area. Press Control-Option-H for help.' => __( 'Rich Text Area. Press Control-Option-H for help.' ),
				'You have unsaved changes are you sure you want to navigate away?' =>
					__( 'The changes you made will be lost if you navigate away from this page.' ),
				'Your browser doesn\'t support direct access to the clipboard. Please use the Ctrl+X/C/V keyboard shortcuts instead.' =>
					__( 'Your browser does not support direct access to the clipboard. Please use keyboard shortcuts or your browser’s edit menu instead.' ),

				// TinyMCE menus.
				'Insert'                               => _x( 'Insert', 'TinyMCE menu' ),
				'File'                                 => _x( 'File', 'TinyMCE menu' ),
				'Edit'                                 => _x( 'Edit', 'TinyMCE menu' ),
				'Tools'                                => _x( 'Tools', 'TinyMCE menu' ),
				'View'                                 => _x( 'View', 'TinyMCE menu' ),
				'Table'                                => _x( 'Table', 'TinyMCE menu' ),
				'Format'                               => _x( 'Format', 'TinyMCE menu' ),

				// WordPress strings.
				'Toolbar Toggle'                       => array( __( 'Toolbar Toggle' ), 'accessZ' ),
				'Insert Read More tag'                 => array( __( 'Insert Read More tag' ), 'accessT' ),
				'Insert Page Break tag'                => array( __( 'Insert Page Break tag' ), 'accessP' ),
				'Read more...'                         => __( 'Read more...' ), // Title on the placeholder inside the editor (no ellipsis).
				'Distraction-free writing mode'        => array( __( 'Distraction-free writing mode' ), 'accessW' ),
				'No alignment'                         => __( 'No alignment' ), // Tooltip for the 'alignnone' button in the image toolbar.
				'Remove'                               => __( 'Remove' ),       // Tooltip for the 'remove' button in the image toolbar.
				'Edit|button'                          => __( 'Edit' ),         // Tooltip for the 'edit' button in the image toolbar.
				'Paste URL or type to search'          => __( 'Paste URL or type to search' ), // Placeholder for the inline link dialog.
				'Apply'                                => __( 'Apply' ),        // Tooltip for the 'apply' button in the inline link dialog.
				'Link options'                         => __( 'Link options' ), // Tooltip for the 'link options' button in the inline link dialog.
				'Visual'                               => _x( 'Visual', 'Name for the Visual editor tab' ),             // Editor switch tab label.
				'Text'                                 => _x( 'Text', 'Name for the Text editor tab (formerly HTML)' ), // Editor switch tab label.
				'Add Media'                            => array( __( 'Add Media' ), 'accessM' ), // Tooltip for the 'Add Media' button in the block editor Classic block.

				// Shortcuts help modal.
				'Keyboard Shortcuts'                   => array( __( 'Keyboard Shortcuts' ), 'accessH' ),
				'Classic Block Keyboard Shortcuts'     => __( 'Classic Block Keyboard Shortcuts' ),
				'Default shortcuts,'                   => __( 'Default shortcuts,' ),
				'Additional shortcuts,'                => __( 'Additional shortcuts,' ),
				'Focus shortcuts:'                     => __( 'Focus shortcuts:' ),
				'Inline toolbar (when an image, link or preview is selected)' => __( 'Inline toolbar (when an image, link or preview is selected)' ),
				'Editor menu (when enabled)'           => __( 'Editor menu (when enabled)' ),
				'Editor toolbar'                       => __( 'Editor toolbar' ),
				'Elements path'                        => __( 'Elements path' ),
				'Ctrl + Alt + letter:'                 => __( 'Ctrl + Alt + letter:' ),
				'Shift + Alt + letter:'                => __( 'Shift + Alt + letter:' ),
				'Cmd + letter:'                        => __( 'Cmd + letter:' ),
				'Ctrl + letter:'                       => __( 'Ctrl + letter:' ),
				'Letter'                               => __( 'Letter' ),
				'Action'                               => __( 'Action' ),
				'Warning: the link has been inserted but may have errors. Please test it.' => __( 'Warning: the link has been inserted but may have errors. Please test it.' ),
				'To move focus to other buttons use Tab or the arrow keys. To return focus to the editor press Escape or use one of the buttons.' =>
					__( 'To move focus to other buttons use Tab or the arrow keys. To return focus to the editor press Escape or use one of the buttons.' ),
				'When starting a new paragraph with one of these formatting shortcuts followed by a space, the formatting will be applied automatically. Press Backspace or Escape to undo.' =>
					__( 'When starting a new paragraph with one of these formatting shortcuts followed by a space, the formatting will be applied automatically. Press Backspace or Escape to undo.' ),
				'The following formatting shortcuts are replaced when pressing Enter. Press Escape or the Undo button to undo.' =>
					__( 'The following formatting shortcuts are replaced when pressing Enter. Press Escape or the Undo button to undo.' ),
				'The next group of formatting shortcuts are applied as you type or when you insert them around plain text in the same paragraph. Press Escape or the Undo button to undo.' =>
					__( 'The next group of formatting shortcuts are applied as you type or when you insert them around plain text in the same paragraph. Press Escape or the Undo button to undo.' ),
			);
		}

		/*
		Imagetools plugin (not included):
			'Edit image' => __( 'Edit image' ),
			'Image options' => __( 'Image options' ),
			'Back' => __( 'Back' ),
			'Invert' => __( 'Invert' ),
			'Flip horizontally' => __( 'Flip horizontal' ),
			'Flip vertically' => __( 'Flip vertical' ),
			'Crop' => __( 'Crop' ),
			'Orientation' => __( 'Orientation' ),
			'Resize' => __( 'Resize' ),
			'Rotate clockwise' => __( 'Rotate right' ),
			'Rotate counterclockwise' => __( 'Rotate left' ),
			'Sharpen' => __( 'Sharpen' ),
			'Brightness' => __( 'Brightness' ),
			'Color levels' => __( 'Color levels' ),
			'Contrast' => __( 'Contrast' ),
			'Gamma' => __( 'Gamma' ),
			'Zoom in' => __( 'Zoom in' ),
			'Zoom out' => __( 'Zoom out' ),
		*/

		return self::$translation;
	}

	/**
	 * Translates the default TinyMCE strings and returns them as JSON encoded object ready to be loaded with tinymce.addI18n(),
	 * or as JS snippet that should run after tinymce.js is loaded.
	 *
	 * @since 3.9.0
	 *
	 * @param string $mce_locale The locale used for the editor.
	 * @param bool   $json_only  Optional. Whether to include the JavaScript calls to tinymce.addI18n() and
	 *                           tinymce.ScriptLoader.markDone().
	 * @return string Translation object, JSON encoded.
	 */
	public static function wp_mce_translation( $mce_locale = '', $json_only = false ) {
		if ( ! $mce_locale ) {
			$mce_locale = self::get_mce_locale();
		}

		$mce_translation = self::get_translation();

		foreach ( $mce_translation as $name => $value ) {
			if ( is_array( $value ) ) {
				$mce_translation[ $name ] = $value[0];
			}
		}

		/**
		 * Filters translated strings prepared for TinyMCE.
		 *
		 * @since 3.9.0
		 *
		 * @param array  $mce_translation Key/value pairs of strings.
		 * @param string $mce_locale      Locale.
		 */
		$mce_translation = apply_filters( 'wp_mce_translation', $mce_translation, $mce_locale );

		foreach ( $mce_translation as $key => $value ) {
			// Remove strings that are not translated.
			if ( $key === $value ) {
				unset( $mce_translation[ $key ] );
				continue;
			}

			if ( false !== strpos( $value, '&' ) ) {
				$mce_translation[ $key ] = html_entity_decode( $value, ENT_QUOTES, 'UTF-8' );
			}
		}

		// Set direction.
		if ( is_rtl() ) {
			$mce_translation['_dir'] = 'rtl';
		}

		if ( $json_only ) {
			return wp_json_encode( $mce_translation );
		}

		$baseurl = self::get_baseurl();

		return "tinymce.addI18n( '$mce_locale', " . wp_json_encode( $mce_translation ) . ");\n" .
			"tinymce.ScriptLoader.markDone( '$baseurl/langs/$mce_locale.js' );\n";
	}

	/**
	 * Force uncompressed TinyMCE when a custom theme has been defined.
	 *
	 * The compressed TinyMCE file cannot deal with custom themes, so this makes
	 * sure that we use the uncompressed TinyMCE file if a theme is defined.
	 * Even if we are on a production environment.
	 *
	 * @since 5.0.0
	 */
	public static function force_uncompressed_tinymce() {
		$has_custom_theme = false;
		foreach ( self::$mce_settings as $init ) {
			if ( ! empty( $init['theme_url'] ) ) {
				$has_custom_theme = true;
				break;
			}
		}

		if ( ! $has_custom_theme ) {
			return;
		}

		$wp_scripts = wp_scripts();

		$wp_scripts->remove( 'wp-tinymce' );
		wp_register_tinymce_scripts( $wp_scripts, true );
	}

	/**
	 * Print (output) the main TinyMCE scripts.
	 *
	 * @since 4.8.0
	 *
	 * @global bool $concatenate_scripts
	 */
	public static function print_tinymce_scripts() {
		global $concatenate_scripts;

		if ( self::$tinymce_scripts_printed ) {
			return;
		}

		self::$tinymce_scripts_printed = true;

		if ( ! isset( $concatenate_scripts ) ) {
			script_concat_settings();
		}

		wp_print_scripts( array( 'wp-tinymce' ) );

		echo "\n";
	}

	/**
	 * Print (output) the TinyMCE configuration and initialization scripts.
	 *
	 * @since 3.3.0
	 *
	 * @global string $tinymce_version
	 */
	public static function editor_js() {
		global $tinymce_version;

		$tmce_on = ! empty( self::$mce_settings );
		$mceInit = '';
		$qtInit  = '';

		if ( $tmce_on ) {
			foreach ( self::$mce_settings as $editor_id => $init ) {
				$options  = self::_parse_init( $init );
				$mceInit .= "'$editor_id':{$options},";
			}
			$mceInit = '{' . trim( $mceInit, ',' ) . '}';
		} else {
			$mceInit = '{}';
		}

		if ( ! empty( self::$qt_settings ) ) {
			foreach ( self::$qt_settings as $editor_id => $init ) {
				$options = self::_parse_init( $init );
				$qtInit .= "'$editor_id':{$options},";
			}
			$qtInit = '{' . trim( $qtInit, ',' ) . '}';
		} else {
			$qtInit = '{}';
		}

		$ref = array(
			'plugins'  => implode( ',', self::$plugins ),
			'theme'    => 'modern',
			'language' => self::$mce_locale,
		);

		$suffix  = SCRIPT_DEBUG ? '' : '.min';
		$baseurl = self::get_baseurl();
		$version = 'ver=' . $tinymce_version;

		/**
		 * Fires immediately before the TinyMCE settings are printed.
		 *
		 * @since 3.2.0
		 *
		 * @param array $mce_settings TinyMCE settings array.
		 */
		do_action( 'before_wp_tiny_mce', self::$mce_settings );
		?>

		<?php

		if ( $tmce_on ) {
			self::print_tinymce_scripts();

			if ( self::$ext_plugins ) {
				// Load the old-format English strings to prevent unsightly labels in old style popups.
				echo "\n";
			}
		}

		/**
		 * Fires after tinymce.js is loaded, but before any TinyMCE editor
		 * instances are created.
		 *
		 * @since 3.9.0
		 *
		 * @param array $mce_settings TinyMCE settings array.
		 */
		do_action( 'wp_tiny_mce_init', self::$mce_settings );

		?>

		<?php

		if ( in_array( 'wplink', self::$plugins, true ) || in_array( 'link', self::$qt_buttons, true ) ) {
			self::wp_link_dialog();
		}

		/**
		 * Fires after any core TinyMCE editor instances are created.
		 *
		 * @since 3.2.0
		 *
		 * @param array $mce_settings TinyMCE settings array.
		 */
		do_action( 'after_wp_tiny_mce', self::$mce_settings );
	}

	/**
	 * Outputs the HTML for distraction-free writing mode.
	 *
	 * @since 3.2.0
	 * @deprecated 4.3.0
	 */
	public static function wp_fullscreen_html() {
		_deprecated_function( __FUNCTION__, '4.3.0' );
	}

	/**
	 * Performs post queries for internal linking.
	 *
	 * @since 3.1.0
	 *
	 * @param array $args Optional. Accepts 'pagenum' and 's' (search) arguments.
	 * @return array|false Results.
	 */
	public static function wp_link_query( $args = array() ) {
		$pts      = get_post_types( array( 'public' => true ), 'objects' );
		$pt_names = array_keys( $pts );

		$query = array(
			'post_type'              => $pt_names,
			'suppress_filters'       => true,
			'update_post_term_cache' => false,
			'update_post_meta_cache' => false,
			'post_status'            => 'publish',
			'posts_per_page'         => 20,
		);

		$args['pagenum'] = isset( $args['pagenum'] ) ? absint( $args['pagenum'] ) : 1;

		if ( isset( $args['s'] ) ) {
			$query['s'] = $args['s'];
		}

		$query['offset'] = $args['pagenum'] > 1 ? $query['posts_per_page'] * ( $args['pagenum'] - 1 ) : 0;

		/**
		 * Filters the link query arguments.
		 *
		 * Allows modification of the link query arguments before querying.
		 *
		 * @see WP_Query for a full list of arguments
		 *
		 * @since 3.7.0
		 *
		 * @param array $query An array of WP_Query arguments.
		 */
		$query = apply_filters( 'wp_link_query_args', $query );

		// Do main query.
		$get_posts = new WP_Query;
		$posts     = $get_posts->query( $query );

		// Build results.
		$results = array();
		foreach ( $posts as $post ) {
			if ( 'post' === $post->post_type ) {
				$info = mysql2date( __( 'Y/m/d' ), $post->post_date );
			} else {
				$info = $pts[ $post->post_type ]->labels->singular_name;
			}

			$results[] = array(
				'ID'        => $post->ID,
				'title'     => trim( esc_html( strip_tags( get_the_title( $post ) ) ) ),
				'permalink' => get_permalink( $post->ID ),
				'info'      => $info,
			);
		}

		/**
		 * Filters the link query results.
		 *
		 * Allows modification of the returned link query results.
		 *
		 * @since 3.7.0
		 *
		 * @see 'wp_link_query_args' filter
		 *
		 * @param array $results {
		 *     An array of associative arrays of query results.
		 *
		 *     @type array ...$0 {
		 *         @type int    $ID        Post ID.
		 *         @type string $title     The trimmed, escaped post title.
		 *         @type string $permalink Post permalink.
		 *         @type string $info      A 'Y/m/d'-formatted date for 'post' post type,
		 *                                 the 'singular_name' post type label otherwise.
		 *     }
		 * }
		 * @param array $query  An array of WP_Query arguments.
		 */
		$results = apply_filters( 'wp_link_query', $results, $query );

		return ! empty( $results ) ? $results : false;
	}

	/**
	 * Dialog for internal linking.
	 *
	 * @since 3.1.0
	 */
	public static function wp_link_dialog() {
		// Run once.
		if ( self::$link_dialog_printed ) {
			return;
		}

		self::$link_dialog_printed = true;

		// `display: none` is required here, see #WP27605.
		?>

		<form id="wp-link" tabindex="-1">
		<?php wp_nonce_field( 'internal-linking', '_ajax_linking_nonce', false ); ?>

<?php _e( 'Insert/edit link' ); ?>

		<button type="button" id="wp-link-close"><?php _e( 'Close' ); ?></button>

<?php _e( 'Enter the destination URL' ); ?>

					<?php _e( 'URL' ); ?>
					<input id="wp-link-url" type="text" aria-describedby="wplink-enter-url" />

					<?php _e( 'Link Text' ); ?>
					<input id="wp-link-text" type="text" />

					<input type="checkbox" id="wp-link-target" /> <?php _e( 'Open link in a new tab' ); ?>

<?php _e( 'Or link to existing content' ); ?>

						<?php _e( 'Search' ); ?>
						<input type="search" id="wp-link-search" class="link-search-field" autocomplete="off" aria-describedby="wplink-link-existing-content" />

						<?php _e( 'No search term specified. Showing recent items.' ); ?>
						<?php _e( 'Search or use up and down arrow keys to select an item.' ); ?>

				<button type="button" class="button"><?php _e( 'Cancel' ); ?></button>

				<input type="submit" value="<?php esc_attr_e( 'Add Link' ); ?>" class="button button-primary" id="wp-link-submit" name="wp-link-submit">

		</form>

		<?php
	}
}


<?php
/**
 * API for easily embedding rich media such as videos and images into content.
 *
 * @package WordPress
 * @subpackage Embed
 * @since 2.9.0
 */
class WP_Embed {
	public $handlers = array();
	public $post_ID;
	public $usecache      = true;
	public $linkifunknown = true;
	public $last_attr     = array();
	public $last_url      = '';

	/**
	 * When a URL cannot be embedded, return false instead of returning a link
	 * or the URL.
	 *
	 * Bypasses the {@see 'embed_maybe_make_link'} filter.
	 *
	 * @var bool
	 */
	public $return_false_on_fail = false;

	/**
	 * Constructor
	 */
	public function __construct() {
		// Hack to get the [embed] shortcode to run before wpautop().
		add_filter( 'the_content', array( $this, 'run_shortcode' ), 8 );
		add_filter( 'widget_text_content', array( $this, 'run_shortcode' ), 8 );

		// Shortcode placeholder for strip_shortcodes().
		add_shortcode( 'embed', '__return_false' );

		// Attempts to embed all URLs in a post.
		add_filter( 'the_content', array( $this, 'autoembed' ), 8 );
		add_filter( 'widget_text_content', array( $this, 'autoembed' ), 8 );

		// After a post is saved, cache oEmbed items via Ajax.
		add_action( 'edit_form_advanced', array( $this, 'maybe_run_ajax_cache' ) );
		add_action( 'edit_page_form', array( $this, 'maybe_run_ajax_cache' ) );
	}

	/**
	 * Process the [embed] shortcode.
	 *
	 * Since the [embed] shortcode needs to be run earlier than other shortcodes,
	 * this function removes all existing shortcodes, registers the [embed] shortcode,
	 * calls do_shortcode(), and then re-registers the old shortcodes.
	 *
	 * @global array $shortcode_tags
	 *
	 * @param string $content Content to parse
	 * @return string Content with shortcode parsed
	 */
	public function run_shortcode( $content ) {
		global $shortcode_tags;

		// Back up current registered shortcodes and clear them all out.
		$orig_shortcode_tags = $shortcode_tags;
		remove_all_shortcodes();

		add_shortcode( 'embed', array( $this, 'shortcode' ) );

		// Do the shortcode (only the [embed] one is registered).
		$content = do_shortcode( $content, true );

		// Put the original shortcodes back.
		$shortcode_tags = $orig_shortcode_tags;

		return $content;
	}

	/**
	 * If a post/page was saved, then output JavaScript to make
	 * an Ajax request that will call WP_Embed::cache_oembed().
	 */
	public function maybe_run_ajax_cache() {
		$post = get_post();

		if ( ! $post || empty( $_GET['message'] ) ) {
			return;
		}

		?>

		<?php
	}

	/**
	 * Registers an embed handler.
	 *
	 * Do not use this function directly, use wp_embed_register_handler() instead.
	 *
	 * This function should probably also only be used for sites that do not support oEmbed.
	 *
	 * @param string   $id       An internal ID/name for the handler. Needs to be unique.
	 * @param string   $regex    The regex that will be used to see if this handler should be used for a URL.
	 * @param callable $callback The callback function that will be called if the regex is matched.
	 * @param int      $priority Optional. Used to specify the order in which the registered handlers will be tested.
	 *                           Lower numbers correspond with earlier testing, and handlers with the same priority are
	 *                           tested in the order in which they were added to the action. Default 10.
	 */
	public function register_handler( $id, $regex, $callback, $priority = 10 ) {
		$this->handlers[ $priority ][ $id ] = array(
			'regex'    => $regex,
			'callback' => $callback,
		);
	}

	/**
	 * Unregisters a previously-registered embed handler.
	 *
	 * Do not use this function directly, use wp_embed_unregister_handler() instead.
	 *
	 * @param string $id       The handler ID that should be removed.
	 * @param int    $priority Optional. The priority of the handler to be removed (default: 10).
	 */
	public function unregister_handler( $id, $priority = 10 ) {
		unset( $this->handlers[ $priority ][ $id ] );
	}

	/**
	 * Returns embed HTML for a given URL from embed handlers.
	 *
	 * Attempts to convert a URL into embed HTML by checking the URL
	 * against the regex of the registered embed handlers.
	 *
	 * @since 5.5.0
	 *
	 * @param array  $attr {
	 *     Shortcode attributes. Optional.
	 *
	 *     @type int $width  Width of the embed in pixels.
	 *     @type int $height Height of the embed in pixels.
	 * }
	 * @param string $url The URL attempting to be embedded.
	 * @return string|false The embed HTML on success, false otherwise.
	 */
	public function get_embed_handler_html( $attr, $url ) {
		$rawattr = $attr;
		$attr    = wp_parse_args( $attr, wp_embed_defaults( $url ) );

		ksort( $this->handlers );
		foreach ( $this->handlers as $priority => $handlers ) {
			foreach ( $handlers as $id => $handler ) {
				if ( preg_match( $handler['regex'], $url, $matches ) && is_callable( $handler['callback'] ) ) {
					$return = call_user_func( $handler['callback'], $matches, $attr, $url, $rawattr );
					if ( false !== $return ) {
						/**
						 * Filters the returned embed HTML.
						 *
						 * @since 2.9.0
						 *
						 * @see WP_Embed::shortcode()
						 *
						 * @param string|false $return The HTML result of the shortcode, or false on failure.
						 * @param string       $url    The embed URL.
						 * @param array        $attr   An array of shortcode attributes.
						 */
						return apply_filters( 'embed_handler_html', $return, $url, $attr );
					}
				}
			}
		}

		return false;
	}

	/**
	 * The do_shortcode() callback function.
	 *
	 * Attempts to convert a URL into embed HTML. Starts by checking the URL against the regex of
	 * the registered embed handlers. If none of the regex matches and it's enabled, then the URL
	 * will be given to the WP_oEmbed class.
	 *
	 * @param array  $attr {
	 *     Shortcode attributes. Optional.
	 *
	 *     @type int $width  Width of the embed in pixels.
	 *     @type int $height Height of the embed in pixels.
	 * }
	 * @param string $url The URL attempting to be embedded.
	 * @return string|false The embed HTML on success, otherwise the original URL.
	 *                      `->maybe_make_link()` can return false on failure.
	 */
	public function shortcode( $attr, $url = '' ) {
		$post = get_post();

		if ( empty( $url ) && ! empty( $attr['src'] ) ) {
			$url = $attr['src'];
		}

		$this->last_url = $url;

		if ( empty( $url ) ) {
			$this->last_attr = $attr;
			return '';
		}

		$rawattr = $attr;
		$attr    = wp_parse_args( $attr, wp_embed_defaults( $url ) );

		$this->last_attr = $attr;

		// KSES converts & into & and we need to undo this.
		// See https://core.trac.wordpress.org/ticket/11311
		$url = str_replace( '&', '&', $url );

		// Look for known internal handlers.
		$embed_handler_html = $this->get_embed_handler_html( $rawattr, $url );
		if ( false !== $embed_handler_html ) {
			return $embed_handler_html;
		}

		$post_ID = ( ! empty( $post->ID ) ) ? $post->ID : null;

		// Potentially set by WP_Embed::cache_oembed().
		if ( ! empty( $this->post_ID ) ) {
			$post_ID = $this->post_ID;
		}

		// Check for a cached result (stored as custom post or in the post meta).
		$key_suffix    = md5( $url . serialize( $attr ) );
		$cachekey      = '_oembed_' . $key_suffix;
		$cachekey_time = '_oembed_time_' . $key_suffix;

		/**
		 * Filters the oEmbed TTL value (time to live).
		 *
		 * @since 4.0.0
		 *
		 * @param int    $time    Time to live (in seconds).
		 * @param string $url     The attempted embed URL.
		 * @param array  $attr    An array of shortcode attributes.
		 * @param int    $post_ID Post ID.
		 */
		$ttl = apply_filters( 'oembed_ttl', DAY_IN_SECONDS, $url, $attr, $post_ID );

		$cache      = '';
		$cache_time = 0;

		$cached_post_id = $this->find_oembed_post_id( $key_suffix );

		if ( $post_ID ) {
			$cache      = get_post_meta( $post_ID, $cachekey, true );
			$cache_time = get_post_meta( $post_ID, $cachekey_time, true );

			if ( ! $cache_time ) {
				$cache_time = 0;
			}
		} elseif ( $cached_post_id ) {
			$cached_post = get_post( $cached_post_id );

			$cache      = $cached_post->post_content;
			$cache_time = strtotime( $cached_post->post_modified_gmt );
		}

		$cached_recently = ( time() - $cache_time ) < $ttl;

		if ( $this->usecache || $cached_recently ) {
			// Failures are cached. Serve one if we're using the cache.
			if ( '{{unknown}}' === $cache ) {
				return $this->maybe_make_link( $url );
			}

			if ( ! empty( $cache ) ) {
				/**
				 * Filters the cached oEmbed HTML.
				 *
				 * @since 2.9.0
				 *
				 * @see WP_Embed::shortcode()
				 *
				 * @param string|false $cache   The cached HTML result, stored in post meta.
				 * @param string       $url     The attempted embed URL.
				 * @param array        $attr    An array of shortcode attributes.
				 * @param int          $post_ID Post ID.
				 */
				return apply_filters( 'embed_oembed_html', $cache, $url, $attr, $post_ID );
			}
		}

		/**
		 * Filters whether to inspect the given URL for discoverable link tags.
		 *
		 * @since 2.9.0
		 * @since 4.4.0 The default value changed to true.
		 *
		 * @see WP_oEmbed::discover()
		 *
		 * @param bool $enable Whether to enable `<link>` tag discovery. Default true.
		 */
		$attr['discover'] = apply_filters( 'embed_oembed_discover', true );

		// Use oEmbed to get the HTML.
		$html = wp_oembed_get( $url, $attr );

		if ( $post_ID ) {
			if ( $html ) {
				update_post_meta( $post_ID, $cachekey, $html );
				update_post_meta( $post_ID, $cachekey_time, time() );
			} elseif ( ! $cache ) {
				update_post_meta( $post_ID, $cachekey, '{{unknown}}' );
			}
		} else {
			$has_kses = false !== has_filter( 'content_save_pre', 'wp_filter_post_kses' );

			if ( $has_kses ) {
				// Prevent KSES from corrupting JSON in post_content.
				kses_remove_filters();
			}

			$insert_post_args = array(
				'post_name'   => $key_suffix,
				'post_status' => 'publish',
				'post_type'   => 'oembed_cache',
			);

			if ( $html ) {
				if ( $cached_post_id ) {
					wp_update_post(
						wp_slash(
							array(
								'ID'           => $cached_post_id,
								'post_content' => $html,
							)
						)
					);
				} else {
					wp_insert_post(
						wp_slash(
							array_merge(
								$insert_post_args,
								array(
									'post_content' => $html,
								)
							)
						)
					);
				}
			} elseif ( ! $cache ) {
				wp_insert_post(
					wp_slash(
						array_merge(
							$insert_post_args,
							array(
								'post_content' => '{{unknown}}',
							)
						)
					)
				);
			}

			if ( $has_kses ) {
				kses_init_filters();
			}
		}

		// If there was a result, return it.
		if ( $html ) {
			/** This filter is documented in wp-includes/class-wp-embed.php */
			return apply_filters( 'embed_oembed_html', $html, $url, $attr, $post_ID );
		}

		// Still unknown.
		return $this->maybe_make_link( $url );
	}

	/**
	 * Delete all oEmbed caches. Unused by core as of 4.0.0.
	 *
	 * @param int $post_ID Post ID to delete the caches for.
	 */
	public function delete_oembed_caches( $post_ID ) {
		$post_metas = get_post_custom_keys( $post_ID );
		if ( empty( $post_metas ) ) {
			return;
		}

		foreach ( $post_metas as $post_meta_key ) {
			if ( '_oembed_' === substr( $post_meta_key, 0, 8 ) ) {
				delete_post_meta( $post_ID, $post_meta_key );
			}
		}
	}

	/**
	 * Triggers a caching of all oEmbed results.
	 *
	 * @param int $post_ID Post ID to do the caching for.
	 */
	public function cache_oembed( $post_ID ) {
		$post = get_post( $post_ID );

		$post_types = get_post_types( array( 'show_ui' => true ) );

		/**
		 * Filters the array of post types to cache oEmbed results for.
		 *
		 * @since 2.9.0
		 *
		 * @param string[] $post_types Array of post type names to cache oEmbed results for. Defaults to post types with `show_ui` set to true.
		 */
		$cache_oembed_types = apply_filters( 'embed_cache_oembed_types', $post_types );

		if ( empty( $post->ID ) || ! in_array( $post->post_type, $cache_oembed_types, true ) ) {
			return;
		}

		// Trigger a caching.
		if ( ! empty( $post->post_content ) ) {
			$this->post_ID  = $post->ID;
			$this->usecache = false;

			$content = $this->run_shortcode( $post->post_content );
			$this->autoembed( $content );

			$this->usecache = true;
		}
	}

	/**
	 * Passes any unlinked URLs that are on their own line to WP_Embed::shortcode() for potential embedding.
	 *
	 * @see WP_Embed::autoembed_callback()
	 *
	 * @param string $content The content to be searched.
	 * @return string Potentially modified $content.
	 */
	public function autoembed( $content ) {
		// Replace line breaks from all HTML elements with placeholders.
		$content = wp_replace_in_html_tags( $content, array( "\n" => '' ) );

		if ( preg_match( '#(^|\s|>)https?://#i', $content ) ) {
			// Find URLs on their own line.
			$content = preg_replace_callback( '|^(\s*)(https?://[^\s<>"]+)(\s*)$|im', array( $this, 'autoembed_callback' ), $content );
			// Find URLs in their own paragraph.
			$content = preg_replace_callback( '|(
]*)?>\s*)(https?://[^\s<>"]+)(\s*<\/p>)|i', array( $this, 'autoembed_callback' ), $content );
		}

		// Put the line breaks back.
		return str_replace( '', "\n", $content );
	}

	/**
	 * Callback function for WP_Embed::autoembed().
	 *
	 * @param array $match A regex match array.
	 * @return string The embed HTML on success, otherwise the original URL.
	 */
	public function autoembed_callback( $match ) {
		$oldval              = $this->linkifunknown;
		$this->linkifunknown = false;
		$return              = $this->shortcode( array(), $match[2] );
		$this->linkifunknown = $oldval;

		return $match[1] . $return . $match[3];
	}

	/**
	 * Conditionally makes a hyperlink based on an internal class variable.
	 *
	 * @param string $url URL to potentially be linked.
	 * @return string|false Linked URL or the original URL. False if 'return_false_on_fail' is true.
	 */
	public function maybe_make_link( $url ) {
		if ( $this->return_false_on_fail ) {
			return false;
		}

		$output = ( $this->linkifunknown ) ? '' . esc_html( $url ) . '' : $url;

		/**
		 * Filters the returned, maybe-linked embed URL.
		 *
		 * @since 2.9.0
		 *
		 * @param string $output The linked or original URL.
		 * @param string $url    The original URL.
		 */
		return apply_filters( 'embed_maybe_make_link', $output, $url );
	}

	/**
	 * Find the oEmbed cache post ID for a given cache key.
	 *
	 * @since 4.9.0
	 *
	 * @param string $cache_key oEmbed cache key.
	 * @return int|null Post ID on success, null on failure.
	 */
	public function find_oembed_post_id( $cache_key ) {
		$cache_group    = 'oembed_cache_post';
		$oembed_post_id = wp_cache_get( $cache_key, $cache_group );

		if ( $oembed_post_id && 'oembed_cache' === get_post_type( $oembed_post_id ) ) {
			return $oembed_post_id;
		}

		$oembed_post_query = new WP_Query(
			array(
				'post_type'              => 'oembed_cache',
				'post_status'            => 'publish',
				'name'                   => $cache_key,
				'posts_per_page'         => 1,
				'no_found_rows'          => true,
				'cache_results'          => true,
				'update_post_meta_cache' => false,
				'update_post_term_cache' => false,
				'lazy_load_term_meta'    => false,
			)
		);

		if ( ! empty( $oembed_post_query->posts ) ) {
			// Note: 'fields' => 'ids' is not being used in order to cache the post object as it will be needed.
			$oembed_post_id = $oembed_post_query->posts[0]->ID;
			wp_cache_set( $cache_key, $oembed_post_id, $cache_group );

			return $oembed_post_id;
		}

		return null;
	}
}


<?php
/**
 * WordPress Error API.
 *
 * Contains the WP_Error class and the is_wp_error() function.
 *
 * @package WordPress
 */

/**
 * WordPress Error class.
 *
 * Container for checking for WordPress errors and error messages. Return
 * WP_Error and use is_wp_error() to check if this class is returned. Many
 * core WordPress functions pass this class in the event of an error and
 * if not handled properly will result in code errors.
 *
 * @since 2.1.0
 */
class WP_Error {
	/**
	 * Stores the list of errors.
	 *
	 * @since 2.1.0
	 * @var array
	 */
	public $errors = array();

	/**
	 * Stores the list of data for error codes.
	 *
	 * @since 2.1.0
	 * @var array
	 */
	public $error_data = array();

	/**
	 * Initialize the error.
	 *
	 * If `$code` is empty, the other parameters will be ignored.
	 * When `$code` is not empty, `$message` will be used even if
	 * it is empty. The `$data` parameter will be used only if it
	 * is not empty.
	 *
	 * Though the class is constructed with a single error code and
	 * message, multiple codes can be added using the `add()` method.
	 *
	 * @since 2.1.0
	 *
	 * @param string|int $code    Error code.
	 * @param string     $message Error message.
	 * @param mixed      $data    Optional. Error data.
	 */
	public function __construct( $code = '', $message = '', $data = '' ) {
		if ( empty( $code ) ) {
			return;
		}

		$this->errors[ $code ][] = $message;

		if ( ! empty( $data ) ) {
			$this->error_data[ $code ] = $data;
		}
	}

	/**
	 * Retrieve all error codes.
	 *
	 * @since 2.1.0
	 *
	 * @return array List of error codes, if available.
	 */
	public function get_error_codes() {
		if ( ! $this->has_errors() ) {
			return array();
		}

		return array_keys( $this->errors );
	}

	/**
	 * Retrieve first error code available.
	 *
	 * @since 2.1.0
	 *
	 * @return string|int Empty string, if no error codes.
	 */
	public function get_error_code() {
		$codes = $this->get_error_codes();

		if ( empty( $codes ) ) {
			return '';
		}

		return $codes[0];
	}

	/**
	 * Retrieve all error messages or error messages matching code.
	 *
	 * @since 2.1.0
	 *
	 * @param string|int $code Optional. Retrieve messages matching code, if exists.
	 * @return array Error strings on success, or empty array on failure (if using code parameter).
	 */
	public function get_error_messages( $code = '' ) {
		// Return all messages if no code specified.
		if ( empty( $code ) ) {
			$all_messages = array();
			foreach ( (array) $this->errors as $code => $messages ) {
				$all_messages = array_merge( $all_messages, $messages );
			}

			return $all_messages;
		}

		if ( isset( $this->errors[ $code ] ) ) {
			return $this->errors[ $code ];
		} else {
			return array();
		}
	}

	/**
	 * Get single error message.
	 *
	 * This will get the first message available for the code. If no code is
	 * given then the first code available will be used.
	 *
	 * @since 2.1.0
	 *
	 * @param string|int $code Optional. Error code to retrieve message.
	 * @return string
	 */
	public function get_error_message( $code = '' ) {
		if ( empty( $code ) ) {
			$code = $this->get_error_code();
		}
		$messages = $this->get_error_messages( $code );
		if ( empty( $messages ) ) {
			return '';
		}
		return $messages[0];
	}

	/**
	 * Retrieve error data for error code.
	 *
	 * @since 2.1.0
	 *
	 * @param string|int $code Optional. Error code.
	 * @return mixed Error data, if it exists.
	 */
	public function get_error_data( $code = '' ) {
		if ( empty( $code ) ) {
			$code = $this->get_error_code();
		}

		if ( isset( $this->error_data[ $code ] ) ) {
			return $this->error_data[ $code ];
		}
	}

	/**
	 * Verify if the instance contains errors.
	 *
	 * @since 5.1.0
	 *
	 * @return bool
	 */
	public function has_errors() {
		if ( ! empty( $this->errors ) ) {
			return true;
		}
		return false;
	}

	/**
	 * Add an error or append additional message to an existing error.
	 *
	 * @since 2.1.0
	 *
	 * @param string|int $code    Error code.
	 * @param string     $message Error message.
	 * @param mixed      $data    Optional. Error data.
	 */
	public function add( $code, $message, $data = '' ) {
		$this->errors[ $code ][] = $message;
		if ( ! empty( $data ) ) {
			$this->error_data[ $code ] = $data;
		}
	}

	/**
	 * Add data for error code.
	 *
	 * The error code can only contain one error data.
	 *
	 * @since 2.1.0
	 *
	 * @param mixed      $data Error data.
	 * @param string|int $code Error code.
	 */
	public function add_data( $data, $code = '' ) {
		if ( empty( $code ) ) {
			$code = $this->get_error_code();
		}

		$this->error_data[ $code ] = $data;
	}

	/**
	 * Removes the specified error.
	 *
	 * This function removes all error messages associated with the specified
	 * error code, along with any error data for that code.
	 *
	 * @since 4.1.0
	 *
	 * @param string|int $code Error code.
	 */
	public function remove( $code ) {
		unset( $this->errors[ $code ] );
		unset( $this->error_data[ $code ] );
	}
}


<?php
/**
 * Error Protection API: WP_Fatal_Error_Handler class
 *
 * @package WordPress
 * @since 5.2.0
 */

/**
 * Core class used as the default shutdown handler for fatal errors.
 *
 * A drop-in 'fatal-error-handler.php' can be used to override the instance of this class and use a custom
 * implementation for the fatal error handler that WordPress registers. The custom class should extend this class and
 * can override its methods individually as necessary. The file must return the instance of the class that should be
 * registered.
 *
 * @since 5.2.0
 */
class WP_Fatal_Error_Handler {

	/**
	 * Runs the shutdown handler.
	 *
	 * This method is registered via `register_shutdown_function()`.
	 *
	 * @since 5.2.0
	 */
	public function handle() {
		if ( defined( 'WP_SANDBOX_SCRAPING' ) && WP_SANDBOX_SCRAPING ) {
			return;
		}

		// Do not trigger the fatal error handler while updates are being installed.
		if ( wp_is_maintenance_mode() ) {
			return;
		}

		try {
			// Bail if no error found.
			$error = $this->detect_error();
			if ( ! $error ) {
				return;
			}

			if ( ! isset( $GLOBALS['wp_locale'] ) && function_exists( 'load_default_textdomain' ) ) {
				load_default_textdomain();
			}

			$handled = false;

			if ( ! is_multisite() && wp_recovery_mode()->is_initialized() ) {
				$handled = wp_recovery_mode()->handle_error( $error );
			}

			// Display the PHP error template if headers not sent.
			if ( is_admin() || ! headers_sent() ) {
				$this->display_error_template( $error, $handled );
			}
		} catch ( Exception $e ) {
			// Catch exceptions and remain silent.
		}
	}

	/**
	 * Detects the error causing the crash if it should be handled.
	 *
	 * @since 5.2.0
	 *
	 * @return array|null Error that was triggered, or null if no error received or if the error should not be handled.
	 */
	protected function detect_error() {
		$error = error_get_last();

		// No error, just skip the error handling code.
		if ( null === $error ) {
			return null;
		}

		// Bail if this error should not be handled.
		if ( ! $this->should_handle_error( $error ) ) {
			return null;
		}

		return $error;
	}

	/**
	 * Determines whether we are dealing with an error that WordPress should handle
	 * in order to protect the admin backend against WSODs.
	 *
	 * @since 5.2.0
	 *
	 * @param array $error Error information retrieved from error_get_last().
	 * @return bool Whether WordPress should handle this error.
	 */
	protected function should_handle_error( $error ) {
		$error_types_to_handle = array(
			E_ERROR,
			E_PARSE,
			E_USER_ERROR,
			E_COMPILE_ERROR,
			E_RECOVERABLE_ERROR,
		);

		if ( isset( $error['type'] ) && in_array( $error['type'], $error_types_to_handle, true ) ) {
			return true;
		}

		/**
		 * Filters whether a given thrown error should be handled by the fatal error handler.
		 *
		 * This filter is only fired if the error is not already configured to be handled by WordPress core. As such,
		 * it exclusively allows adding further rules for which errors should be handled, but not removing existing
		 * ones.
		 *
		 * @since 5.2.0
		 *
		 * @param bool  $should_handle_error Whether the error should be handled by the fatal error handler.
		 * @param array $error               Error information retrieved from error_get_last().
		 */
		return (bool) apply_filters( 'wp_should_handle_php_error', false, $error );
	}

	/**
	 * Displays the PHP error template and sends the HTTP status code, typically 500.
	 *
	 * A drop-in 'php-error.php' can be used as a custom template. This drop-in should control the HTTP status code and
	 * print the HTML markup indicating that a PHP error occurred. Note that this drop-in may potentially be executed
	 * very early in the WordPress bootstrap process, so any core functions used that are not part of
	 * `wp-includes/load.php` should be checked for before being called.
	 *
	 * If no such drop-in is available, this will call {@see WP_Fatal_Error_Handler::display_default_error_template()}.
	 *
	 * @since 5.2.0
	 * @since 5.3.0 The `$handled` parameter was added.
	 *
	 * @param array         $error   Error information retrieved from `error_get_last()`.
	 * @param true|WP_Error $handled Whether Recovery Mode handled the fatal error.
	 */
	protected function display_error_template( $error, $handled ) {
		if ( defined( 'WP_CONTENT_DIR' ) ) {
			// Load custom PHP error template, if present.
			$php_error_pluggable = WP_CONTENT_DIR . '/php-error.php';
			if ( is_readable( $php_error_pluggable ) ) {
				require_once $php_error_pluggable;

				return;
			}
		}

		// Otherwise, display the default error template.
		$this->display_default_error_template( $error, $handled );
	}

	/**
	 * Displays the default PHP error template.
	 *
	 * This method is called conditionally if no 'php-error.php' drop-in is available.
	 *
	 * It calls {@see wp_die()} with a message indicating that the site is experiencing technical difficulties and a
	 * login link to the admin backend. The {@see 'wp_php_error_message'} and {@see 'wp_php_error_args'} filters can
	 * be used to modify these parameters.
	 *
	 * @since 5.2.0
	 * @since 5.3.0 The `$handled` parameter was added.
	 *
	 * @param array         $error   Error information retrieved from `error_get_last()`.
	 * @param true|WP_Error $handled Whether Recovery Mode handled the fatal error.
	 */
	protected function display_default_error_template( $error, $handled ) {
		if ( ! function_exists( '__' ) ) {
			wp_load_translations_early();
		}

		if ( ! function_exists( 'wp_die' ) ) {
			require_once ABSPATH . WPINC . '/functions.php';
		}

		if ( ! class_exists( 'WP_Error' ) ) {
			require_once ABSPATH . WPINC . '/class-wp-error.php';
		}

		if ( true === $handled && wp_is_recovery_mode() ) {
			$message = __( 'There has been a critical error on your website, putting it in recovery mode. Please check the Themes and Plugins screens for more details. If you just installed or updated a theme or plugin, check the relevant page for that first.' );
		} elseif ( is_protected_endpoint() ) {
			$message = __( 'There has been a critical error on your website. Please check your site admin email inbox for instructions.' );
		} else {
			$message = __( 'There has been a critical error on your website.' );
		}

		$message = sprintf(
			'
%s

%s
',
			$message,
			/* translators: Documentation explaining debugging in WordPress. */
			__( 'https://wordpress.org/support/article/debugging-in-wordpress/' ),
			__( 'Learn more about debugging in WordPress.' )
		);

		$args = array(
			'response' => 500,
			'exit'     => false,
		);

		/**
		 * Filters the message that the default PHP error template displays.
		 *
		 * @since 5.2.0
		 *
		 * @param string $message HTML error message to display.
		 * @param array  $error   Error information retrieved from `error_get_last()`.
		 */
		$message = apply_filters( 'wp_php_error_message', $message, $error );

		/**
		 * Filters the arguments passed to {@see wp_die()} for the default PHP error template.
		 *
		 * @since 5.2.0
		 *
		 * @param array $args Associative array of arguments passed to `wp_die()`. By default these contain a
		 *                    'response' key, and optionally 'link_url' and 'link_text' keys.
		 * @param array $error Error information retrieved from `error_get_last()`.
		 */
		$args = apply_filters( 'wp_php_error_args', $args, $error );

		$wp_error = new WP_Error(
			'internal_server_error',
			$message,
			array(
				'error' => $error,
			)
		);

		wp_die( $wp_error, '', $args );
	}
}


<?php
/**
 * Feed API: WP_Feed_Cache_Transient class
 *
 * @package WordPress
 * @subpackage Feed
 * @since 4.7.0
 */

/**
 * Core class used to implement feed cache transients.
 *
 * @since 2.8.0
 */
class WP_Feed_Cache_Transient {

	/**
	 * Holds the transient name.
	 *
	 * @since 2.8.0
	 * @var string
	 */
	public $name;

	/**
	 * Holds the transient mod name.
	 *
	 * @since 2.8.0
	 * @var string
	 */
	public $mod_name;

	/**
	 * Holds the cache duration in seconds.
	 *
	 * Defaults to 43200 seconds (12 hours).
	 *
	 * @since 2.8.0
	 * @var int
	 */
	public $lifetime = 43200;

	/**
	 * Constructor.
	 *
	 * @since 2.8.0
	 * @since 3.2.0 Updated to use a PHP5 constructor.
	 *
	 * @param string $location  URL location (scheme is used to determine handler).
	 * @param string $filename  Unique identifier for cache object.
	 * @param string $extension 'spi' or 'spc'.
	 */
	public function __construct( $location, $filename, $extension ) {
		$this->name     = 'feed_' . $filename;
		$this->mod_name = 'feed_mod_' . $filename;

		$lifetime = $this->lifetime;
		/**
		 * Filters the transient lifetime of the feed cache.
		 *
		 * @since 2.8.0
		 *
		 * @param int    $lifetime Cache duration in seconds. Default is 43200 seconds (12 hours).
		 * @param string $filename Unique identifier for the cache object.
		 */
		$this->lifetime = apply_filters( 'wp_feed_cache_transient_lifetime', $lifetime, $filename );
	}

	/**
	 * Sets the transient.
	 *
	 * @since 2.8.0
	 *
	 * @param SimplePie $data Data to save.
	 * @return true Always true.
	 */
	public function save( $data ) {
		if ( $data instanceof SimplePie ) {
			$data = $data->data;
		}

		set_transient( $this->name, $data, $this->lifetime );
		set_transient( $this->mod_name, time(), $this->lifetime );
		return true;
	}

	/**
	 * Gets the transient.
	 *
	 * @since 2.8.0
	 *
	 * @return mixed Transient value.
	 */
	public function load() {
		return get_transient( $this->name );
	}

	/**
	 * Gets mod transient.
	 *
	 * @since 2.8.0
	 *
	 * @return mixed Transient value.
	 */
	public function mtime() {
		return get_transient( $this->mod_name );
	}

	/**
	 * Sets mod transient.
	 *
	 * @since 2.8.0
	 *
	 * @return bool False if value was not set and true if value was set.
	 */
	public function touch() {
		return set_transient( $this->mod_name, time(), $this->lifetime );
	}

	/**
	 * Deletes transients.
	 *
	 * @since 2.8.0
	 *
	 * @return true Always true.
	 */
	public function unlink() {
		delete_transient( $this->name );
		delete_transient( $this->mod_name );
		return true;
	}
}


<?php
/**
 * Feed API: WP_Feed_Cache class
 *
 * @package WordPress
 * @subpackage Feed
 * @since 4.7.0
 */

/**
 * Core class used to implement a feed cache.
 *
 * @since 2.8.0
 *
 * @see SimplePie_Cache
 */
class WP_Feed_Cache extends SimplePie_Cache {

	/**
	 * Creates a new SimplePie_Cache object.
	 *
	 * @since 2.8.0
	 *
	 * @param string $location  URL location (scheme is used to determine handler).
	 * @param string $filename  Unique identifier for cache object.
	 * @param string $extension 'spi' or 'spc'.
	 * @return WP_Feed_Cache_Transient Feed cache handler object that uses transients.
	 */
	public function create( $location, $filename, $extension ) {
		return new WP_Feed_Cache_Transient( $location, $filename, $extension );
	}
}