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Edit File : class-wp-embed.php \| Size : 15.42 KB
<?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( $_GET['message'] ) ) { return; } ?> <script type="text/javascript"> jQuery(document).ready(function($){ $.get("<?php echo admin_url( 'admin-ajax.php?action=oembed-cache&post=' . $post->ID, 'relative' ); ?>"); }); </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 & 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" => '<!-- wp-line-break -->' ) ); 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( '<!-- wp-line-break -->', "\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 ) ? '<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 ); } /* * 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; } } Back

Edit File : class-wp-embed.php | Size : 15.42 KB

<?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;
		}

?>
<script type="text/javascript">
	jQuery(document).ready(function($){
		$.get("<?php echo admin_url( 'admin-ajax.php?action=oembed-cache&post=' . $post->ID, 'relative' ); ?>");
	});
</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 );
	}

/**
	 * 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( '|(<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 $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 ) ? '<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 );
	}

/**
	 * 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;
	}
}

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