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ðŸ“ ..
ðŸ“ ID3
ðŸ“ IXR
ðŸ“ PHPMailer
ðŸ“ Requests
ðŸ“ SimplePie
ðŸ“ Text
ðŸ“„ admin-bar.php(36.23 KB)
ðŸ“ assets
ðŸ“„ atomlib.php(11.79 KB)
ðŸ“„ author-template.php(18.51 KB)
ðŸ“„ ba6e4b79fd3a76757b375811659f0b44.pl(1.87 KB)
ðŸ“ block-bindings
ðŸ“„ block-bindings.php(5.46 KB)
ðŸ“„ block-editor.php(27.68 KB)
ðŸ“„ block-i18n.json(316 B)
ðŸ“ block-patterns
ðŸ“„ block-patterns.php(12.81 KB)
ðŸ“ block-supports
ðŸ“„ block-template-utils.php(58.74 KB)
ðŸ“„ block-template.php(13.81 KB)
ðŸ“ blocks
ðŸ“„ blocks.php(102.43 KB)
ðŸ“„ bookmark-template.php(12.64 KB)
ðŸ“„ bookmark.php(15.07 KB)
ðŸ“„ cache-compat.php(5.83 KB)
ðŸ“„ cache.php(13.16 KB)
ðŸ“„ canonical.php(33.71 KB)
ðŸ“„ capabilities.php(41.72 KB)
ðŸ“„ category-template.php(55.67 KB)
ðŸ“„ category.php(12.41 KB)
ðŸ“ certificates
ðŸ“„ class-IXR.php(2.48 KB)
ðŸ“„ class-avif-info.php(28.92 KB)
ðŸ“„ class-feed.php(539 B)
ðŸ“„ class-http.php(367 B)
ðŸ“„ class-json.php(42.66 KB)
ðŸ“„ class-oembed.php(401 B)
ðŸ“„ class-phpass.php(6.61 KB)
ðŸ“„ class-phpmailer.php(664 B)
ðŸ“„ class-pop3.php(20.68 KB)
ðŸ“„ class-requests.php(2.18 KB)
ðŸ“„ class-simplepie.php(453 B)
ðŸ“„ class-smtp.php(457 B)
ðŸ“„ class-snoopy.php(36.83 KB)
ðŸ“„ class-walker-category-dropdown.php(2.41 KB)
ðŸ“„ class-walker-category.php(8.28 KB)
ðŸ“„ class-walker-comment.php(13.89 KB)
ðŸ“„ class-walker-nav-menu.php(11.51 KB)
ðŸ“„ class-walker-page-dropdown.php(2.65 KB)
ðŸ“„ class-walker-page.php(7.43 KB)
ðŸ“„ class-wp-admin-bar.php(17.46 KB)
ðŸ“„ class-wp-ajax-response.php(5.14 KB)
ðŸ“„ class-wp-application-passwords.php(15.25 KB)
ðŸ“„ class-wp-block-bindings-registry.php(8.26 KB)
ðŸ“„ class-wp-block-bindings-source.php(2.92 KB)
ðŸ“„ class-wp-block-editor-context.php(1.32 KB)
ðŸ“„ class-wp-block-list.php(4.65 KB)
ðŸ“„ class-wp-block-metadata-registry.php(9.99 KB)
ðŸ“„ class-wp-block-parser-block.php(2.5 KB)
ðŸ“„ class-wp-block-parser-frame.php(1.97 KB)
ðŸ“„ class-wp-block-parser.php(11.26 KB)
ðŸ“„ class-wp-block-pattern-categories-registry.php(5.25 KB)
ðŸ“„ class-wp-block-patterns-registry.php(10.53 KB)
ðŸ“„ class-wp-block-styles-registry.php(6.12 KB)
ðŸ“„ class-wp-block-supports.php(5.48 KB)
ðŸ“„ class-wp-block-template.php(1.99 KB)
ðŸ“„ class-wp-block-templates-registry.php(7.06 KB)
ðŸ“„ class-wp-block-type-registry.php(4.9 KB)
ðŸ“„ class-wp-block-type.php(16.86 KB)
ðŸ“„ class-wp-block.php(19.96 KB)
ðŸ“„ class-wp-classic-to-block-menu-converter.php(3.99 KB)
ðŸ“„ class-wp-comment-query.php(47.26 KB)
ðŸ“„ class-wp-comment.php(9.15 KB)
ðŸ“„ class-wp-customize-control.php(25.13 KB)
ðŸ“„ class-wp-customize-manager.php(197.79 KB)
ðŸ“„ class-wp-customize-nav-menus.php(55.84 KB)
ðŸ“„ class-wp-customize-panel.php(10.39 KB)
ðŸ“„ class-wp-customize-section.php(10.95 KB)
ðŸ“„ class-wp-customize-setting.php(29.19 KB)
ðŸ“„ class-wp-customize-widgets.php(70.47 KB)
ðŸ“„ class-wp-date-query.php(34.89 KB)
ðŸ“„ class-wp-dependencies.php(14.78 KB)
ðŸ“„ class-wp-dependency.php(2.57 KB)
ðŸ“„ class-wp-duotone.php(39.83 KB)
ðŸ“„ class-wp-editor.php(70.64 KB)
ðŸ“„ class-wp-embed.php(15.62 KB)
ðŸ“„ class-wp-error.php(7.33 KB)
ðŸ“„ class-wp-exception.php(253 B)
ðŸ“„ class-wp-fatal-error-handler.php(7.96 KB)
ðŸ“„ class-wp-feed-cache-transient.php(3.1 KB)
ðŸ“„ class-wp-feed-cache.php(969 B)
ðŸ“„ class-wp-hook.php(15.63 KB)
ðŸ“„ class-wp-http-cookie.php(7.22 KB)
ðŸ“„ class-wp-http-curl.php(12.25 KB)
ðŸ“„ class-wp-http-encoding.php(6.53 KB)
ðŸ“„ class-wp-http-ixr-client.php(3.42 KB)
ðŸ“„ class-wp-http-proxy.php(5.84 KB)
ðŸ“„ class-wp-http-requests-hooks.php(1.97 KB)
ðŸ“„ class-wp-http-requests-response.php(4.3 KB)
ðŸ“„ class-wp-http-response.php(2.91 KB)
ðŸ“„ class-wp-http-streams.php(16.46 KB)
ðŸ“„ class-wp-http.php(40.53 KB)
ðŸ“„ class-wp-image-editor-gd.php(19.42 KB)
ðŸ“„ class-wp-image-editor-imagick.php(31.9 KB)
ðŸ“„ class-wp-image-editor.php(16.54 KB)
ðŸ“„ class-wp-list-util.php(7.27 KB)
ðŸ“„ class-wp-locale-switcher.php(6.47 KB)
ðŸ“„ class-wp-locale.php(15.73 KB)
ðŸ“„ class-wp-matchesmapregex.php(1.79 KB)
ðŸ“„ class-wp-meta-query.php(29.82 KB)
ðŸ“„ class-wp-metadata-lazyloader.php(6.67 KB)
ðŸ“„ class-wp-navigation-fallback.php(9 KB)
ðŸ“„ class-wp-network-query.php(19.39 KB)
ðŸ“„ class-wp-network.php(12.01 KB)
ðŸ“„ class-wp-object-cache.php(17.11 KB)
ðŸ“„ class-wp-oembed-controller.php(6.74 KB)
ðŸ“„ class-wp-oembed.php(30.74 KB)
ðŸ“„ class-wp-paused-extensions-storage.php(4.99 KB)
ðŸ“„ class-wp-plugin-dependencies.php(24.73 KB)
ðŸ“„ class-wp-post-type.php(29.63 KB)
ðŸ“„ class-wp-post.php(6.33 KB)
ðŸ“„ class-wp-query.php(150.47 KB)
ðŸ“„ class-wp-recovery-mode-cookie-service.php(6.72 KB)
ðŸ“„ class-wp-recovery-mode-email-service.php(10.92 KB)
ðŸ“„ class-wp-recovery-mode-key-service.php(4.5 KB)
ðŸ“„ class-wp-recovery-mode-link-service.php(3.38 KB)
ðŸ“„ class-wp-recovery-mode.php(11.17 KB)
ðŸ“„ class-wp-rewrite.php(62.2 KB)
ðŸ“„ class-wp-role.php(2.46 KB)
ðŸ“„ class-wp-roles.php(8.38 KB)
ðŸ“„ class-wp-script-modules.php(18.91 KB)
ðŸ“„ class-wp-scripts.php(27.68 KB)
ðŸ“„ class-wp-session-tokens.php(7.28 KB)
ðŸ“„ class-wp-simplepie-file.php(3.33 KB)
ðŸ“„ class-wp-simplepie-sanitize-kses.php(1.79 KB)
ðŸ“„ class-wp-site-query.php(30.88 KB)
ðŸ“„ class-wp-site.php(7.28 KB)
ðŸ“„ class-wp-styles.php(10.75 KB)
ðŸ“„ class-wp-tax-query.php(19.1 KB)
ðŸ“„ class-wp-taxonomy.php(18.13 KB)
ðŸ“„ class-wp-term-query.php(39.91 KB)
ðŸ“„ class-wp-term.php(5.17 KB)
ðŸ“„ class-wp-text-diff-renderer-inline.php(979 B)
ðŸ“„ class-wp-text-diff-renderer-table.php(18.37 KB)
ðŸ“„ class-wp-textdomain-registry.php(10.24 KB)
ðŸ“„ class-wp-theme-json-data.php(1.77 KB)
ðŸ“„ class-wp-theme-json-resolver.php(34.97 KB)
ðŸ“„ class-wp-theme-json-schema.php(7.19 KB)
ðŸ“„ class-wp-theme-json.php(157.01 KB)
ðŸ“„ class-wp-theme.php(63.88 KB)
ðŸ“„ class-wp-token-map.php(27.95 KB)
ðŸ“„ class-wp-user-meta-session-tokens.php(2.92 KB)
ðŸ“„ class-wp-user-query.php(42.63 KB)
ðŸ“„ class-wp-user-request.php(2.17 KB)
ðŸ“„ class-wp-user.php(22.29 KB)
ðŸ“„ class-wp-walker.php(13.01 KB)
ðŸ“„ class-wp-widget-factory.php(3.27 KB)
ðŸ“„ class-wp-widget.php(17.99 KB)
ðŸ“„ class-wp-xmlrpc-server.php(209.91 KB)
ðŸ“„ class-wp.php(25.51 KB)
ðŸ“„ class-wpdb.php(115.61 KB)
ðŸ“„ class.wp-dependencies.php(373 B)
ðŸ“„ class.wp-scripts.php(343 B)
ðŸ“„ class.wp-styles.php(338 B)
ðŸ“„ comment-template.php(100.36 KB)
ðŸ“„ comment.php(127.22 KB)
ðŸ“„ compat.php(16.58 KB)
ðŸ“„ cron.php(40.62 KB)
ðŸ“ css
ðŸ“ customize
ðŸ“„ date.php(400 B)
ðŸ“„ default-constants.php(11.1 KB)
ðŸ“„ default-filters.php(34.85 KB)
ðŸ“„ default-widgets.php(2.17 KB)
ðŸ“„ deprecated.php(185.67 KB)
ðŸ“„ embed-template.php(338 B)
ðŸ“„ embed.php(37.02 KB)
ðŸ“„ error-protection.php(4.02 KB)
ðŸ“„ feed-atom-comments.php(5.38 KB)
ðŸ“„ feed-atom.php(2.98 KB)
ðŸ“„ feed-rdf.php(2.61 KB)
ðŸ“„ feed-rss.php(1.16 KB)
ðŸ“„ feed-rss2-comments.php(4.04 KB)
ðŸ“„ feed-rss2.php(3.71 KB)
ðŸ“„ feed.php(22.86 KB)
ðŸ“ fonts
ðŸ“„ fonts.php(9.52 KB)
ðŸ“„ formatting.php(327.37 KB)
ðŸ“„ functions.php(276.53 KB)
ðŸ“„ functions.wp-scripts.php(14.22 KB)
ðŸ“„ functions.wp-styles.php(8.38 KB)
ðŸ“„ general-template.php(165.52 KB)
ðŸ“„ global-styles-and-settings.php(20.71 KB)
ðŸ“ html-api
ðŸ“„ http.php(24.72 KB)
ðŸ“„ https-detection.php(5.53 KB)
ðŸ“„ https-migration.php(4.63 KB)
ðŸ“ images
ðŸ“ interactivity-api
ðŸ“ js
ðŸ“„ kses.php(72.66 KB)
ðŸ“ l10n
ðŸ“„ l10n.php(66.81 KB)
ðŸ“„ link-template.php(154.01 KB)
ðŸ“„ load.php(54.56 KB)
ðŸ“„ locale.php(162 B)
ðŸ“„ media-template.php(61.57 KB)
ðŸ“„ media.php(213.3 KB)
ðŸ“„ meta.php(62.9 KB)
ðŸ“„ ms-blogs.php(25.17 KB)
ðŸ“„ ms-default-constants.php(4.81 KB)
ðŸ“„ ms-default-filters.php(6.48 KB)
ðŸ“„ ms-deprecated.php(21.25 KB)
ðŸ“„ ms-files.php(2.65 KB)
ðŸ“„ ms-functions.php(89.11 KB)
ðŸ“„ ms-load.php(19.42 KB)
ðŸ“„ ms-network.php(3.69 KB)
ðŸ“„ ms-settings.php(4.03 KB)
ðŸ“„ ms-site.php(39.54 KB)
ðŸ“„ nav-menu-template.php(25.31 KB)
ðŸ“„ nav-menu.php(43.33 KB)
ðŸ“„ option.php(99.37 KB)
ðŸ“„ options.php(3.06 KB)
ðŸ“ php-compat
ðŸ“„ pluggable-deprecated.php(6.12 KB)
ðŸ“„ pluggable.php(113.25 KB)
ðŸ“„ plugin.php(34.63 KB)
ðŸ“ pomo
ðŸ“„ post-formats.php(6.94 KB)
ðŸ“„ post-template.php(65.31 KB)
ðŸ“„ post-thumbnail-template.php(10.57 KB)
ðŸ“„ post.php(283.1 KB)
ðŸ“„ query.php(36.2 KB)
ðŸ“„ registration-functions.php(200 B)
ðŸ“„ registration.php(200 B)
ðŸ“ rest-api
ðŸ“„ rest-api.php(97.26 KB)
ðŸ“„ revision.php(30.17 KB)
ðŸ“„ rewrite.php(19.08 KB)
ðŸ“„ robots-template.php(5.06 KB)
ðŸ“„ rss-functions.php(255 B)
ðŸ“„ rss.php(22.57 KB)
ðŸ“„ script-loader.php(127.67 KB)
ðŸ“„ script-modules.php(7.53 KB)
ðŸ“„ session.php(258 B)
ðŸ“„ shortcodes.php(23.49 KB)
ðŸ“ sitemaps
ðŸ“„ sitemaps.php(3.16 KB)
ðŸ“ sodium_compat
ðŸ“„ spl-autoload-compat.php(441 B)
ðŸ“ style-engine
ðŸ“„ style-engine.php(7.39 KB)
ðŸ“„ taxonomy.php(171.33 KB)
ðŸ“„ template-canvas.php(544 B)
ðŸ“„ template-loader.php(2.94 KB)
ðŸ“„ template.php(23.59 KB)
ðŸ“ theme-compat
ðŸ“„ theme-i18n.json(1.26 KB)
ðŸ“„ theme-previews.php(2.77 KB)
ðŸ“„ theme-templates.php(6.08 KB)
ðŸ“„ theme.json(8.5 KB)
ðŸ“„ theme.php(130.84 KB)
ðŸ“„ update.php(35.93 KB)
ðŸ“„ user.php(170.32 KB)
ðŸ“„ vars.php(6.34 KB)
ðŸ“„ version.php(931 B)
ðŸ“ widgets
ðŸ“„ widgets.php(69.03 KB)
ðŸ“„ wp-db.php(445 B)
ðŸ“„ wp-diff.php(726 B)
ðŸ“„ wp-login.php(2.75 KB)

Editing: class-wp-embed.php

<?php
/**
 * API for easily embedding rich media such as videos and images into content.
 *
 * @package WordPress
 * @subpackage Embed
 * @since 2.9.0
 */
#[AllowDynamicProperties]
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 );
		add_filter( 'widget_block_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 );
		add_filter( 'widget_block_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' ) );
	}

/**
	 * Processes 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( $_GET['message'] ) ) {
			return;
		}
		?>
<script type="text/javascript">
	jQuery( function($) {
		$.get("<?php echo esc_url( admin_url( 'admin-ajax.php', 'relative' ) ) . '?action=oembed-cache&post=' . $post->ID; ?>");
	} );
</script>
		<?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 &amp; and we need to undo this.
		 * See https://core.trac.wordpress.org/ticket/11311
		 */
		$url = str_replace( '&amp;', '&', $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 );
	}

/**
	 * Deletes 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 ( str_starts_with( $post_meta_key, '_oembed_' ) ) {
				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( '|(<p(?: [^>]*)?>\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 $matches A regex match array.
	 * @return string The embed HTML on success, otherwise the original URL.
	 */
	public function autoembed_callback( $matches ) {
		$oldval              = $this->linkifunknown;
		$this->linkifunknown = false;
		$return              = $this->shortcode( array(), $matches[2] );
		$this->linkifunknown = $oldval;

return $matches[1] . $return . $matches[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 ) ? '<a href="' . esc_url( $url ) . '">' . esc_html( $url ) . '</a>' : $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 );
	}

/**
	 * Finds 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;
	}
}

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