register_handler( $id, $regex, $callback, $priority ); } /** * Unregisters a previously-registered embed handler. * * @since 2.9.0 * * @global WP_Embed $wp_embed * * @param string $id The handler ID that should be removed. * @param int $priority Optional. The priority of the handler to be removed. Default 10. */ function wp_embed_unregister_handler( $id, $priority = 10 ) { global $wp_embed; $wp_embed->unregister_handler( $id, $priority ); } /** * Creates default array of embed parameters. * * The width defaults to the content width as specified by the theme. If the * theme does not specify a content width, then 500px is used. * * The default height is 1.5 times the width, or 1000px, whichever is smaller. * * The {@see 'embed_defaults'} filter can be used to adjust either of these values. * * @since 2.9.0 * * @global int $content_width * * @param string $url Optional. The URL that should be embedded. Default empty. * @return array { * Indexed array of the embed width and height in pixels. * * @type int $0 The embed width. * @type int $1 The embed height. * } */ function wp_embed_defaults( $url = '' ) { if ( ! empty( $GLOBALS['content_width'] ) ) { $width = (int) $GLOBALS['content_width']; } if ( empty( $width ) ) { $width = 500; } $height = min( ceil( $width * 1.5 ), 1000 ); /** * Filters the default array of embed dimensions. * * @since 2.9.0 * * @param int[] $size { * Indexed array of the embed width and height in pixels. * * @type int $0 The embed width. * @type int $1 The embed height. * } * @param string $url The URL that should be embedded. */ return apply_filters( 'embed_defaults', compact( 'width', 'height' ), $url ); } /** * Attempts to fetch the embed HTML for a provided URL using oEmbed. * * @since 2.9.0 * * @see WP_oEmbed * * @param string $url The URL that should be embedded. * @param array|string $args { * Optional. Additional arguments for retrieving embed HTML. Default empty. * * @type int|string $width Optional. The `maxwidth` value passed to the provider URL. * @type int|string $height Optional. The `maxheight` value passed to the provider URL. * @type bool $discover Optional. Determines whether to attempt to discover link tags * at the given URL for an oEmbed provider when the provider URL * is not found in the built-in providers list. Default true. * } * @return string|false The embed HTML on success, false on failure. */ function wp_oembed_get( $url, $args = '' ) { $oembed = _wp_oembed_get_object(); return $oembed->get_html( $url, $args ); } /** * Returns the initialized WP_oEmbed object. * * @since 2.9.0 * @access private * * @return WP_oEmbed object. */ function _wp_oembed_get_object() { static $wp_oembed = null; if ( is_null( $wp_oembed ) ) { $wp_oembed = new WP_oEmbed(); } return $wp_oembed; } /** * Adds a URL format and oEmbed provider URL pair. * * @since 2.9.0 * * @see WP_oEmbed * * @param string $format The format of URL that this provider can handle. You can use asterisks * as wildcards. * @param string $provider The URL to the oEmbed provider. * @param bool $regex Optional. Whether the `$format` parameter is in a RegEx format. Default false. */ function wp_oembed_add_provider( $format, $provider, $regex = false ) { if ( did_action( 'plugins_loaded' ) ) { $oembed = _wp_oembed_get_object(); $oembed->providers[ $format ] = array( $provider, $regex ); } else { WP_oEmbed::_add_provider_early( $format, $provider, $regex ); } } /** * Removes an oEmbed provider. * * @since 3.5.0 * * @see WP_oEmbed * * @param string $format The URL format for the oEmbed provider to remove. * @return bool Was the provider removed successfully? */ function wp_oembed_remove_provider( $format ) { if ( did_action( 'plugins_loaded' ) ) { $oembed = _wp_oembed_get_object(); if ( isset( $oembed->providers[ $format ] ) ) { unset( $oembed->providers[ $format ] ); return true; } } else { WP_oEmbed::_remove_provider_early( $format ); } return false; } /** * Determines if default embed handlers should be loaded. * * Checks to make sure that the embeds library hasn't already been loaded. If * it hasn't, then it will load the embeds library. * * @since 2.9.0 * * @see wp_embed_register_handler() */ function wp_maybe_load_embeds() { /** * Filters whether to load the default embed handlers. * * Returning a falsey value will prevent loading the default embed handlers. * * @since 2.9.0 * * @param bool $maybe_load_embeds Whether to load the embeds library. Default true. */ if ( ! apply_filters( 'load_default_embeds', true ) ) { return; } wp_embed_register_handler( 'youtube_embed_url', '#https?://(www.)?youtube\.com/(?:v|embed)/([^/]+)#i', 'wp_embed_handler_youtube' ); /** * Filters the audio embed handler callback. * * @since 3.6.0 * * @param callable $handler Audio embed handler callback function. */ wp_embed_register_handler( 'audio', '#^https?://.+?\.(' . implode( '|', wp_get_audio_extensions() ) . ')$#i', apply_filters( 'wp_audio_embed_handler', 'wp_embed_handler_audio' ), 9999 ); /** * Filters the video embed handler callback. * * @since 3.6.0 * * @param callable $handler Video embed handler callback function. */ wp_embed_register_handler( 'video', '#^https?://.+?\.(' . implode( '|', wp_get_video_extensions() ) . ')$#i', apply_filters( 'wp_video_embed_handler', 'wp_embed_handler_video' ), 9999 ); } /** * YouTube iframe embed handler callback. * * Catches YouTube iframe embed URLs that are not parsable by oEmbed but can be translated into a URL that is. * * @since 4.0.0 * * @global WP_Embed $wp_embed * * @param array $matches The RegEx matches from the provided regex when calling * wp_embed_register_handler(). * @param array $attr Embed attributes. * @param string $url The original URL that was matched by the regex. * @param array $rawattr The original unmodified attributes. * @return string The embed HTML. */ function wp_embed_handler_youtube( $matches, $attr, $url, $rawattr ) { global $wp_embed; $embed = $wp_embed->autoembed( sprintf( 'https://youtube.com/watch?v=%s', urlencode( $matches[2] ) ) ); /** * Filters the YoutTube embed output. * * @since 4.0.0 * * @see wp_embed_handler_youtube() * * @param string $embed YouTube embed output. * @param array $attr An array of embed attributes. * @param string $url The original URL that was matched by the regex. * @param array $rawattr The original unmodified attributes. */ return apply_filters( 'wp_embed_handler_youtube', $embed, $attr, $url, $rawattr ); } /** * Audio embed handler callback. * * @since 3.6.0 * * @param array $matches The RegEx matches from the provided regex when calling wp_embed_register_handler(). * @param array $attr Embed attributes. * @param string $url The original URL that was matched by the regex. * @param array $rawattr The original unmodified attributes. * @return string The embed HTML. */ function wp_embed_handler_audio( $matches, $attr, $url, $rawattr ) { $audio = sprintf( '[audio src="%s" /]', esc_url( $url ) ); /** * Filters the audio embed output. * * @since 3.6.0 * * @param string $audio Audio embed output. * @param array $attr An array of embed attributes. * @param string $url The original URL that was matched by the regex. * @param array $rawattr The original unmodified attributes. */ return apply_filters( 'wp_embed_handler_audio', $audio, $attr, $url, $rawattr ); } /** * Video embed handler callback. * * @since 3.6.0 * * @param array $matches The RegEx matches from the provided regex when calling wp_embed_register_handler(). * @param array $attr Embed attributes. * @param string $url The original URL that was matched by the regex. * @param array $rawattr The original unmodified attributes. * @return string The embed HTML. */ function wp_embed_handler_video( $matches, $attr, $url, $rawattr ) { $dimensions = ''; if ( ! empty( $rawattr['width'] ) && ! empty( $rawattr['height'] ) ) { $dimensions .= sprintf( 'width="%d" ', (int) $rawattr['width'] ); $dimensions .= sprintf( 'height="%d" ', (int) $rawattr['height'] ); } $video = sprintf( '[video %s src="%s" /]', $dimensions, esc_url( $url ) ); /** * Filters the video embed output. * * @since 3.6.0 * * @param string $video Video embed output. * @param array $attr An array of embed attributes. * @param string $url The original URL that was matched by the regex. * @param array $rawattr The original unmodified attributes. */ return apply_filters( 'wp_embed_handler_video', $video, $attr, $url, $rawattr ); } /** * Registers the oEmbed REST API route. * * @since 4.4.0 */ function wp_oembed_register_route() { $controller = new WP_oEmbed_Controller(); $controller->register_routes(); } /** * Adds oEmbed discovery links in the website
. * * @since 4.4.0 */ function wp_oembed_add_discovery_links() { $output = ''; if ( is_singular() ) { $output .= '' . "\n"; if ( class_exists( 'SimpleXMLElement' ) ) { $output .= '' . "\n"; } } /** * Filters the oEmbed discovery links HTML. * * @since 4.4.0 * * @param string $output HTML of the discovery links. */ echo apply_filters( 'oembed_discovery_links', $output ); } /** * Adds the necessary JavaScript to communicate with the embedded iframes. * * @since 4.4.0 */ function wp_oembed_add_host_js() { wp_enqueue_script( 'wp-embed' ); } /** * Retrieves the URL to embed a specific post in an iframe. * * @since 4.4.0 * * @param int|WP_Post $post Optional. Post ID or object. Defaults to the current post. * @return string|false The post embed URL on success, false if the post doesn't exist. */ function get_post_embed_url( $post = null ) { $post = get_post( $post ); if ( ! $post ) { return false; } $embed_url = trailingslashit( get_permalink( $post ) ) . user_trailingslashit( 'embed' ); $path_conflict = get_page_by_path( str_replace( home_url(), '', $embed_url ), OBJECT, get_post_types( array( 'public' => true ) ) ); if ( ! get_option( 'permalink_structure' ) || $path_conflict ) { $embed_url = add_query_arg( array( 'embed' => 'true' ), get_permalink( $post ) ); } /** * Filters the URL to embed a specific post. * * @since 4.4.0 * * @param string $embed_url The post embed URL. * @param WP_Post $post The corresponding post object. */ return esc_url_raw( apply_filters( 'post_embed_url', $embed_url, $post ) ); } /** * Retrieves the oEmbed endpoint URL for a given permalink. * * Pass an empty string as the first argument to get the endpoint base URL. * * @since 4.4.0 * * @param string $permalink Optional. The permalink used for the `url` query arg. Default empty. * @param string $format Optional. The requested response format. Default 'json'. * @return string The oEmbed endpoint URL. */ function get_oembed_endpoint_url( $permalink = '', $format = 'json' ) { $url = rest_url( 'oembed/1.0/embed' ); if ( '' !== $permalink ) { $url = add_query_arg( array( 'url' => urlencode( $permalink ), 'format' => ( 'json' !== $format ) ? $format : false, ), $url ); } /** * Filters the oEmbed endpoint URL. * * @since 4.4.0 * * @param string $url The URL to the oEmbed endpoint. * @param string $permalink The permalink used for the `url` query arg. * @param string $format The requested response format. */ return apply_filters( 'oembed_endpoint_url', $url, $permalink, $format ); } /** * Retrieves the embed code for a specific post. * * @since 4.4.0 * * @param int $width The width for the response. * @param int $height The height for the response. * @param int|WP_Post $post Optional. Post ID or object. Default is global `$post`. * @return string|false Embed code on success, false if post doesn't exist. */ function get_post_embed_html( $width, $height, $post = null ) { $post = get_post( $post ); if ( ! $post ) { return false; } $embed_url = get_post_embed_url( $post ); $output = '' . get_the_title( $post ) . "\n"; $output .= ""; $output .= sprintf( '', esc_url( $embed_url ), absint( $width ), absint( $height ), esc_attr( sprintf( /* translators: 1: Post title, 2: Site title. */ __( '“%1$s” — %2$s' ), get_the_title( $post ), get_bloginfo( 'name' ) ) ) ); /** * Filters the embed HTML output for a given post. * * @since 4.4.0 * * @param string $output The default iframe tag to display embedded content. * @param WP_Post $post Current post object. * @param int $width Width of the response. * @param int $height Height of the response. */ return apply_filters( 'embed_html', $output, $post, $width, $height ); } /** * Retrieves the oEmbed response data for a given post. * * @since 4.4.0 * * @param WP_Post|int $post Post object or ID. * @param int $width The requested width. * @return array|false Response data on success, false if post doesn't exist * or is not publicly viewable. */ function get_oembed_response_data( $post, $width ) { $post = get_post( $post ); $width = absint( $width ); if ( ! $post ) { return false; } if ( ! is_post_publicly_viewable( $post ) ) { return false; } /** * Filters the allowed minimum and maximum widths for the oEmbed response. * * @since 4.4.0 * * @param array $min_max_width { * Minimum and maximum widths for the oEmbed response. * * @type int $min Minimum width. Default 200. * @type int $max Maximum width. Default 600. * } */ $min_max_width = apply_filters( 'oembed_min_max_width', array( 'min' => 200, 'max' => 600, ) ); $width = min( max( $min_max_width['min'], $width ), $min_max_width['max'] ); $height = max( ceil( $width / 16 * 9 ), 200 ); $data = array( 'version' => '1.0', 'provider_name' => get_bloginfo( 'name' ), 'provider_url' => get_home_url(), 'author_name' => get_bloginfo( 'name' ), 'author_url' => get_home_url(), 'title' => get_the_title( $post ), 'type' => 'link', ); $author = get_userdata( $post->post_author ); if ( $author ) { $data['author_name'] = $author->display_name; $data['author_url'] = get_author_posts_url( $author->ID ); } /** * Filters the oEmbed response data. * * @since 4.4.0 * * @param array $data The response data. * @param WP_Post $post The post object. * @param int $width The requested width. * @param int $height The calculated height. */ return apply_filters( 'oembed_response_data', $data, $post, $width, $height ); } /** * Retrieves the oEmbed response data for a given URL. * * @since 5.0.0 * * @param string $url The URL that should be inspected for discovery `` tags. * @param array $args oEmbed remote get arguments. * @return object|false oEmbed response data if the URL does belong to the current site. False otherwise. */ function get_oembed_response_data_for_url( $url, $args ) { $switched_blog = false; if ( is_multisite() ) { $url_parts = wp_parse_args( wp_parse_url( $url ), array( 'host' => '', 'path' => '/', ) ); $qv = array( 'domain' => $url_parts['host'], 'path' => '/', 'update_site_meta_cache' => false, ); // In case of subdirectory configs, set the path. if ( ! is_subdomain_install() ) { $path = explode( '/', ltrim( $url_parts['path'], '/' ) ); $path = reset( $path ); if ( $path ) { $qv['path'] = get_network()->path . $path . '/'; } } $sites = get_sites( $qv ); $site = reset( $sites ); // Do not allow embeds for deleted/archived/spam sites. if ( ! empty( $site->deleted ) || ! empty( $site->spam ) || ! empty( $site->archived ) ) { return false; } if ( $site && get_current_blog_id() !== (int) $site->blog_id ) { switch_to_blog( $site->blog_id ); $switched_blog = true; } } $post_id = url_to_postid( $url ); /** This filter is documented in wp-includes/class-wp-oembed-controller.php */ $post_id = apply_filters( 'oembed_request_post_id', $post_id, $url ); if ( ! $post_id ) { if ( $switched_blog ) { restore_current_blog(); } return false; } $width = isset( $args['width'] ) ? $args['width'] : 0; $data = get_oembed_response_data( $post_id, $width ); if ( $switched_blog ) { restore_current_blog(); } return $data ? (object) $data : false; } /** * Filters the oEmbed response data to return an iframe embed code. * * @since 4.4.0 * * @param array $data The response data. * @param WP_Post $post The post object. * @param int $width The requested width. * @param int $height The calculated height. * @return array The modified response data. */ function get_oembed_response_data_rich( $data, $post, $width, $height ) { $data['width'] = absint( $width ); $data['height'] = absint( $height ); $data['type'] = 'rich'; $data['html'] = get_post_embed_html( $width, $height, $post ); // Add post thumbnail to response if available. $thumbnail_id = false; if ( has_post_thumbnail( $post->ID ) ) { $thumbnail_id = get_post_thumbnail_id( $post->ID ); } if ( 'attachment' === get_post_type( $post ) ) { if ( wp_attachment_is_image( $post ) ) { $thumbnail_id = $post->ID; } elseif ( wp_attachment_is( 'video', $post ) ) { $thumbnail_id = get_post_thumbnail_id( $post ); $data['type'] = 'video'; } } if ( $thumbnail_id ) { list( $thumbnail_url, $thumbnail_width, $thumbnail_height ) = wp_get_attachment_image_src( $thumbnail_id, array( $width, 99999 ) ); $data['thumbnail_url'] = $thumbnail_url; $data['thumbnail_width'] = $thumbnail_width; $data['thumbnail_height'] = $thumbnail_height; } return $data; } /** * Ensures that the specified format is either 'json' or 'xml'. * * @since 4.4.0 * * @param string $format The oEmbed response format. Accepts 'json' or 'xml'. * @return string The format, either 'xml' or 'json'. Default 'json'. */ function wp_oembed_ensure_format( $format ) { if ( ! in_array( $format, array( 'json', 'xml' ), true ) ) { return 'json'; } return $format; } /** * Hooks into the REST API output to print XML instead of JSON. * * This is only done for the oEmbed API endpoint, * which supports both formats. * * @access private * @since 4.4.0 * * @param bool $served Whether the request has already been served. * @param WP_HTTP_ResponseInterface $result Result to send to the client. Usually a WP_REST_Response. * @param WP_REST_Request $request Request used to generate the response. * @param WP_REST_Server $server Server instance. * @return true */ function _oembed_rest_pre_serve_request( $served, $result, $request, $server ) { $params = $request->get_params(); if ( '/oembed/1.0/embed' !== $request->get_route() || 'GET' !== $request->get_method() ) { return $served; } if ( ! isset( $params['format'] ) || 'xml' !== $params['format'] ) { return $served; } // Embed links inside the request. $data = $server->response_to_data( $result, false ); if ( ! class_exists( 'SimpleXMLElement' ) ) { status_header( 501 ); die( get_status_header_desc( 501 ) ); } $result = _oembed_create_xml( $data ); // Bail if there's no XML. if ( ! $result ) { status_header( 501 ); return get_status_header_desc( 501 ); } if ( ! headers_sent() ) { $server->send_header( 'Content-Type', 'text/xml; charset=' . get_option( 'blog_charset' ) ); } echo $result; return true; } /** * Creates an XML string from a given array. * * @since 4.4.0 * @access private * * @param array $data The original oEmbed response data. * @param SimpleXMLElement $node Optional. XML node to append the result to recursively. * @return string|false XML string on success, false on error. */ function _oembed_create_xml( $data, $node = null ) { if ( ! is_array( $data ) || empty( $data ) ) { return false; } if ( null === $node ) { $node = new SimpleXMLElement( '