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Edit File : embed.php \| Size : 37.28 KB
<?php /** * oEmbed API: Top-level oEmbed functionality * * @package WordPress * @subpackage oEmbed * @since 4.4.0 / /* * Registers an embed handler. * * Should probably only be used for sites that do not support oEmbed. * * @since 2.9.0 * * @global WP_Embed $wp_embed WordPress Embed object. * * @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. Default 10. / function wp_embed_register_handler( $id, $regex, $callback, $priority = 10 ) { global $wp_embed; $wp_embed->register_handler( $id, $regex, $callback, $priority ); } /* * Unregisters a previously-registered embed handler. * * @since 2.9.0 * * @global WP_Embed $wp_embed WordPress Embed object. * * @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 int[] { * 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( (int) 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 WordPress Embed object. * * @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 YouTube 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 head element of the website. * * @since 4.4.0 * @since 6.8.0 Output was adjusted to only embed if the post supports it. / function wp_oembed_add_discovery_links() { $output = ''; if ( is_singular() && is_post_embeddable() ) { $output .= '<link rel="alternate" title="' . _x( 'oEmbed (JSON)', 'oEmbed resource link name' ) . '" type="application/json+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink() ) ) . '" />' . "\n"; if ( class_exists( 'SimpleXMLElement' ) ) { $output .= '<link rel="alternate" title="' . _x( 'oEmbed (XML)', 'oEmbed resource link name' ) . '" type="text/xml+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink(), 'xml' ) ) . '" />' . "\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. * * This function is no longer used directly. For back-compat it exists exclusively as a way to indicate that the oEmbed * host JS _should_ be added. In `default-filters.php` there remains this code: * * add_action( 'wp_head', 'wp_oembed_add_host_js' ) * * Historically a site has been able to disable adding the oEmbed host script by doing: * * remove_action( 'wp_head', 'wp_oembed_add_host_js' ) * * In order to ensure that such code still works as expected, this function remains. There is now a `has_action()` check * in `wp_maybe_enqueue_oembed_host_js()` to see if `wp_oembed_add_host_js()` has not been unhooked from running at the * `wp_head` action. * * @since 4.4.0 * @deprecated 5.9.0 Use {@see wp_maybe_enqueue_oembed_host_js()} instead. / function wp_oembed_add_host_js() {} /* * Enqueue the wp-embed script if the provided oEmbed HTML contains a post embed. * * In order to only enqueue the wp-embed script on pages that actually contain post embeds, this function checks if the * provided HTML contains post embed markup and if so enqueues the script so that it will get printed in the footer. * * @since 5.9.0 * * @param string $html Embed markup. * @return string Embed markup (without modifications). / function wp_maybe_enqueue_oembed_host_js( $html ) { if ( has_action( 'wp_head', 'wp_oembed_add_host_js' ) && preg_match( '/<blockquote\s[^>]?wp-embedded-content/', $html ) ) { wp_enqueue_script( 'wp-embed' ); } return $html; } /** * 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 sanitize_url( 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 ); $secret = wp_generate_password( 10, false ); $embed_url .= "#?secret={$secret}"; $output = sprintf( '<blockquote class="wp-embedded-content" data-secret="%1$s"><a href="%2$s">%3$s</a></blockquote>', esc_attr( $secret ), esc_url( get_permalink( $post ) ), get_the_title( $post ) ); $output .= sprintf( '<iframe sandbox="allow-scripts" security="restricted" src="%1$s" width="%2$d" height="%3$d" title="%4$s" data-secret="%5$s" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe>', 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' ) ) ), esc_attr( $secret ) ); / * Note that the script must be placed after the <blockquote> and <iframe> due to a regexp parsing issue in * `wp_filter_oembed_result()`. Because of the regex pattern starts with `\|(<blockquote>.?</blockquote>)?.\|` * wherein the <blockquote> is marked as being optional, if it is not at the beginning of the string then the group * will fail to match and everything will be matched by `.` and not included in the group. This regex issue goes back to WordPress 4.4, so in order to not break older installs this script must come at the end. / $output .= wp_get_inline_script_tag( file_get_contents( ABSPATH . WPINC . '/js/wp-embed' . wp_scripts_get_suffix() . '.js' ) ); /* * 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 * @since 6.8.0 Output was adjusted to only embed if the post type supports it. * * @param WP_Post\|int $post Post ID or post object. * @param int $width The requested width. * @return array\|false Response data on success, false if post doesn't exist, * is not publicly viewable or post type is not embeddable. / 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; } if ( ! is_post_embeddable( $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( (int) 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 `<link>` 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' => '', 'port' => null, 'path' => '/', ) ); $qv = array( 'domain' => $url_parts['host'] . ( $url_parts['port'] ? ':' . $url_parts['port'] : '' ), '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, 0 ) ); $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_Response $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( '<oembed></oembed>' ); } foreach ( $data as $key => $value ) { if ( is_numeric( $key ) ) { $key = 'oembed'; } if ( is_array( $value ) ) { $item = $node->addChild( $key ); _oembed_create_xml( $value, $item ); } else { $node->addChild( $key, esc_html( $value ) ); } } return $node->asXML(); } /* * Filters the given oEmbed HTML to make sure iframes have a title attribute. * * @since 5.2.0 * * @param string $result The oEmbed HTML result. * @param object $data A data object result from an oEmbed provider. * @param string $url The URL of the content to be embedded. * @return string The filtered oEmbed result. / function wp_filter_oembed_iframe_title_attribute( $result, $data, $url ) { if ( false === $result \|\| ! in_array( $data->type, array( 'rich', 'video' ), true ) ) { return $result; } $title = ! empty( $data->title ) ? $data->title : ''; $pattern = '`<iframe([^>])>`i'; if ( preg_match( $pattern, $result, $matches ) ) { $attrs = wp_kses_hair( $matches[1], wp_allowed_protocols() ); foreach ( $attrs as $attr => $item ) { $lower_attr = strtolower( $attr ); if ( $lower_attr === $attr ) { continue; } if ( ! isset( $attrs[ $lower_attr ] ) ) { $attrs[ $lower_attr ] = $item; unset( $attrs[ $attr ] ); } } } if ( ! empty( $attrs['title']['value'] ) ) { $title = $attrs['title']['value']; } /** * Filters the title attribute of the given oEmbed HTML iframe. * * @since 5.2.0 * * @param string $title The title attribute. * @param string $result The oEmbed HTML result. * @param object $data A data object result from an oEmbed provider. * @param string $url The URL of the content to be embedded. / $title = apply_filters( 'oembed_iframe_title_attribute', $title, $result, $data, $url ); if ( '' === $title ) { return $result; } if ( isset( $attrs['title'] ) ) { unset( $attrs['title'] ); $attr_string = implode( ' ', wp_list_pluck( $attrs, 'whole' ) ); $result = str_replace( $matches[0], '<iframe ' . trim( $attr_string ) . '>', $result ); } return str_ireplace( '<iframe ', sprintf( '<iframe title="%s" ', esc_attr( $title ) ), $result ); } /* * Filters the given oEmbed HTML. * * If the `$url` isn't on the trusted providers list, * we need to filter the HTML heavily for security. * * Only filters 'rich' and 'video' response types. * * @since 4.4.0 * * @param string $result The oEmbed HTML result. * @param object $data A data object result from an oEmbed provider. * @param string $url The URL of the content to be embedded. * @return string The filtered and sanitized oEmbed result. / function wp_filter_oembed_result( $result, $data, $url ) { if ( false === $result \|\| ! in_array( $data->type, array( 'rich', 'video' ), true ) ) { return $result; } $wp_oembed = _wp_oembed_get_object(); // Don't modify the HTML for trusted providers. if ( false !== $wp_oembed->get_provider( $url, array( 'discover' => false ) ) ) { return $result; } $allowed_html = array( 'a' => array( 'href' => true, ), 'blockquote' => array(), 'iframe' => array( 'src' => true, 'width' => true, 'height' => true, 'frameborder' => true, 'marginwidth' => true, 'marginheight' => true, 'scrolling' => true, 'title' => true, ), ); $html = wp_kses( $result, $allowed_html ); preg_match( '\|(<blockquote>.?</blockquote>)?.(<iframe.?></iframe>)\|ms', $html, $content ); // We require at least the iframe to exist. if ( empty( $content[2] ) ) { return false; } $html = $content[1] . $content[2]; preg_match( '/ src=([\'"])(.?)\1/', $html, $results ); if ( ! empty( $results ) ) { $secret = wp_generate_password( 10, false ); $url = esc_url( "{$results[2]}#?secret=$secret" ); $q = $results[1]; $html = str_replace( $results[0], ' src=' . $q . $url . $q . ' data-secret=' . $q . $secret . $q, $html ); $html = str_replace( '<blockquote', "<blockquote data-secret=\"$secret\"", $html ); } $allowed_html['blockquote']['data-secret'] = true; $allowed_html['iframe']['data-secret'] = true; $html = wp_kses( $html, $allowed_html ); if ( ! empty( $content[1] ) ) { // We have a blockquote to fall back on. Hide the iframe by default. $html = str_replace( '<iframe', '<iframe style="position: absolute; visibility: hidden;"', $html ); $html = str_replace( '<blockquote', '<blockquote class="wp-embedded-content"', $html ); } $html = str_ireplace( '<iframe', '<iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted"', $html ); return $html; } /* * Filters the string in the 'more' link displayed after a trimmed excerpt. * * Replaces '[...]' (appended to automatically generated excerpts) with an * ellipsis and a "Continue reading" link in the embed template. * * @since 4.4.0 * * @param string $more_string Default 'more' string. * @return string 'Continue reading' link prepended with an ellipsis. / function wp_embed_excerpt_more( $more_string ) { if ( ! is_embed() ) { return $more_string; } $link = sprintf( '<a href="%1$s" class="wp-embed-more" target="_top">%2$s</a>', esc_url( get_permalink() ), / translators: %s: Post title. / sprintf( __( 'Continue reading %s' ), '<span class="screen-reader-text">' . get_the_title() . '</span>' ) ); return ' … ' . $link; } /* * Displays the post excerpt for the embed template. * * Intended to be used in 'The Loop'. * * @since 4.4.0 / function the_excerpt_embed() { $output = get_the_excerpt(); /* * Filters the post excerpt for the embed template. * * @since 4.4.0 * * @param string $output The current post excerpt. / echo apply_filters( 'the_excerpt_embed', $output ); } /* * Filters the post excerpt for the embed template. * * Shows players for video and audio attachments. * * @since 4.4.0 * * @param string $content The current post excerpt. * @return string The modified post excerpt. / function wp_embed_excerpt_attachment( $content ) { if ( is_attachment() ) { return prepend_attachment( '' ); } return $content; } /* * Enqueues embed iframe default CSS and JS. * * Enqueue PNG fallback CSS for embed iframe for legacy versions of IE. * * Allows plugins to queue scripts for the embed iframe end using wp_enqueue_script(). * Runs first in oembed_head(). * * @since 4.4.0 / function enqueue_embed_scripts() { wp_enqueue_style( 'wp-embed-template-ie' ); /* * Fires when scripts and styles are enqueued for the embed iframe. * * @since 4.4.0 / do_action( 'enqueue_embed_scripts' ); } /* * Enqueues the CSS in the embed iframe header. * * @since 6.4.0 / function wp_enqueue_embed_styles() { // Back-compat for plugins that disable functionality by unhooking this action. if ( ! has_action( 'embed_head', 'print_embed_styles' ) ) { return; } remove_action( 'embed_head', 'print_embed_styles' ); $suffix = wp_scripts_get_suffix(); $handle = 'wp-embed-template'; wp_register_style( $handle, false ); wp_add_inline_style( $handle, file_get_contents( ABSPATH . WPINC . "/css/wp-embed-template$suffix.css" ) ); wp_enqueue_style( $handle ); } /* * Prints the JavaScript in the embed iframe header. * * @since 4.4.0 / function print_embed_scripts() { wp_print_inline_script_tag( file_get_contents( ABSPATH . WPINC . '/js/wp-embed-template' . wp_scripts_get_suffix() . '.js' ) ); } /* * Prepare the oembed HTML to be displayed in an RSS feed. * * @since 4.4.0 * @access private * * @param string $content The content to filter. * @return string The filtered content. / function _oembed_filter_feed_content( $content ) { $p = new WP_HTML_Tag_Processor( $content ); while ( $p->next_tag( array( 'tag_name' => 'iframe' ) ) ) { if ( $p->has_class( 'wp-embedded-content' ) ) { $p->remove_attribute( 'style' ); } } return $p->get_updated_html(); } /* * Prints the necessary markup for the embed comments button. * * @since 4.4.0 / function print_embed_comments_button() { if ( is_404() \|\| ! ( get_comments_number() \|\| comments_open() ) ) { return; } ?> <div class="wp-embed-comments"> <a href="<?php comments_link(); ?>" target="_top"> <span class="dashicons dashicons-admin-comments"></span> <?php printf( / translators: %s: Number of comments. / _n( '%s <span class="screen-reader-text">Comment</span>', '%s <span class="screen-reader-text">Comments</span>', get_comments_number() ), number_format_i18n( get_comments_number() ) ); ?> </a> </div> <?php } /* * Prints the necessary markup for the embed sharing button. * * @since 4.4.0 / function print_embed_sharing_button() { if ( is_404() ) { return; } ?> <div class="wp-embed-share"> <button type="button" class="wp-embed-share-dialog-open" aria-label="<?php esc_attr_e( 'Open sharing dialog' ); ?>"> <span class="dashicons dashicons-share"></span> </button> </div> <?php } /* * Prints the necessary markup for the embed sharing dialog. * * @since 4.4.0 / function print_embed_sharing_dialog() { if ( is_404() ) { return; } $unique_suffix = get_the_ID() . '-' . wp_rand(); $share_tab_wordpress_id = 'wp-embed-share-tab-wordpress-' . $unique_suffix; $share_tab_html_id = 'wp-embed-share-tab-html-' . $unique_suffix; $description_wordpress_id = 'wp-embed-share-description-wordpress-' . $unique_suffix; $description_html_id = 'wp-embed-share-description-html-' . $unique_suffix; ?> <div class="wp-embed-share-dialog hidden" role="dialog" aria-label="<?php esc_attr_e( 'Sharing options' ); ?>"> <div class="wp-embed-share-dialog-content"> <div class="wp-embed-share-dialog-text"> <ul class="wp-embed-share-tabs" role="tablist"> <li class="wp-embed-share-tab-button wp-embed-share-tab-button-wordpress" role="presentation"> <button type="button" role="tab" aria-controls="<?php echo $share_tab_wordpress_id; ?>" aria-selected="true" tabindex="0"><?php esc_html_e( 'WordPress Embed' ); ?></button> </li> <li class="wp-embed-share-tab-button wp-embed-share-tab-button-html" role="presentation"> <button type="button" role="tab" aria-controls="<?php echo $share_tab_html_id; ?>" aria-selected="false" tabindex="-1"><?php esc_html_e( 'HTML Embed' ); ?></button> </li> </ul> <div id="<?php echo $share_tab_wordpress_id; ?>" class="wp-embed-share-tab" role="tabpanel" aria-hidden="false"> <input type="text" value="<?php the_permalink(); ?>" class="wp-embed-share-input" aria-label="<?php esc_attr_e( 'URL' ); ?>" aria-describedby="<?php echo $description_wordpress_id; ?>" tabindex="0" readonly/> <p class="wp-embed-share-description" id="<?php echo $description_wordpress_id; ?>"> <?php _e( 'Copy and paste this URL into your WordPress site to embed' ); ?> </p> </div> <div id="<?php echo $share_tab_html_id; ?>" class="wp-embed-share-tab" role="tabpanel" aria-hidden="true"> <textarea class="wp-embed-share-input" aria-label="<?php esc_attr_e( 'HTML' ); ?>" aria-describedby="<?php echo $description_html_id; ?>" tabindex="0" readonly><?php echo esc_textarea( get_post_embed_html( 600, 400 ) ); ?></textarea> <p class="wp-embed-share-description" id="<?php echo $description_html_id; ?>"> <?php _e( 'Copy and paste this code into your site to embed' ); ?> </p> </div> </div> <button type="button" class="wp-embed-share-dialog-close" aria-label="<?php esc_attr_e( 'Close sharing dialog' ); ?>"> <span class="dashicons dashicons-no"></span> </button> </div> </div> <?php } /* * Prints the necessary markup for the site title in an embed template. * * @since 4.5.0 / function the_embed_site_title() { $site_title = sprintf( '<a href="%s" target="_top"><img src="%s" srcset="%s 2x" width="32" height="32" alt="" class="wp-embed-site-icon" /><span>%s</span></a>', esc_url( home_url() ), esc_url( get_site_icon_url( 32, includes_url( 'images/w-logo-blue.png' ) ) ), esc_url( get_site_icon_url( 64, includes_url( 'images/w-logo-blue.png' ) ) ), esc_html( get_bloginfo( 'name' ) ) ); $site_title = '<div class="wp-embed-site-title">' . $site_title . '</div>'; /* * Filters the site title HTML in the embed footer. * * @since 4.4.0 * * @param string $site_title The site title HTML. / echo apply_filters( 'embed_site_title_html', $site_title ); } /* * Filters the oEmbed result before any HTTP requests are made. * * If the URL belongs to the current site, the result is fetched directly instead of * going through the oEmbed discovery process. * * @since 4.5.3 * * @param null\|string $result The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. Default null. * @param string $url The URL that should be inspected for discovery `<link>` tags. * @param array $args oEmbed remote get arguments. * @return null\|string The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. * Null if the URL does not belong to the current site. */ function wp_filter_pre_oembed_result( $result, $url, $args ) { $data = get_oembed_response_data_for_url( $url, $args ); if ( $data ) { return _wp_oembed_get_object()->data2html( $data, $url ); } return $result; } Back

Edit File : embed.php | Size : 37.28 KB

<?php
/**
 * oEmbed API: Top-level oEmbed functionality
 *
 * @package WordPress
 * @subpackage oEmbed
 * @since 4.4.0
 */

/**
 * Registers an embed handler.
 *
 * Should probably only be used for sites that do not support oEmbed.
 *
 * @since 2.9.0
 *
 * @global WP_Embed $wp_embed WordPress Embed object.
 *
 * @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. Default 10.
 */
function wp_embed_register_handler( $id, $regex, $callback, $priority = 10 ) {
	global $wp_embed;
	$wp_embed->register_handler( $id, $regex, $callback, $priority );
}

/**
 * Unregisters a previously-registered embed handler.
 *
 * @since 2.9.0
 *
 * @global WP_Embed $wp_embed WordPress Embed object.
 *
 * @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 int[] {
 *     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( (int) 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 WordPress Embed object.
 *
 * @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 YouTube 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 head element of the website.
 *
 * @since 4.4.0
 * @since 6.8.0 Output was adjusted to only embed if the post supports it.
 */
function wp_oembed_add_discovery_links() {
	$output = '';

if ( is_singular() && is_post_embeddable() ) {
		$output .= '<link rel="alternate" title="' . _x( 'oEmbed (JSON)', 'oEmbed resource link name' ) . '" type="application/json+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink() ) ) . '" />' . "\n";

if ( class_exists( 'SimpleXMLElement' ) ) {
			$output .= '<link rel="alternate" title="' . _x( 'oEmbed (XML)', 'oEmbed resource link name' ) . '" type="text/xml+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink(), 'xml' ) ) . '" />' . "\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.
 *
 * This function is no longer used directly. For back-compat it exists exclusively as a way to indicate that the oEmbed
 * host JS _should_ be added. In `default-filters.php` there remains this code:
 *
 *     add_action( 'wp_head', 'wp_oembed_add_host_js' )
 *
 * Historically a site has been able to disable adding the oEmbed host script by doing:
 *
 *     remove_action( 'wp_head', 'wp_oembed_add_host_js' )
 *
 * In order to ensure that such code still works as expected, this function remains. There is now a `has_action()` check
 * in `wp_maybe_enqueue_oembed_host_js()` to see if `wp_oembed_add_host_js()` has not been unhooked from running at the
 * `wp_head` action.
 *
 * @since 4.4.0
 * @deprecated 5.9.0 Use {@see wp_maybe_enqueue_oembed_host_js()} instead.
 */
function wp_oembed_add_host_js() {}

/**
 * Enqueue the wp-embed script if the provided oEmbed HTML contains a post embed.
 *
 * In order to only enqueue the wp-embed script on pages that actually contain post embeds, this function checks if the
 * provided HTML contains post embed markup and if so enqueues the script so that it will get printed in the footer.
 *
 * @since 5.9.0
 *
 * @param string $html Embed markup.
 * @return string Embed markup (without modifications).
 */
function wp_maybe_enqueue_oembed_host_js( $html ) {
	if (
		has_action( 'wp_head', 'wp_oembed_add_host_js' )
		&&
		preg_match( '/<blockquote\s[^>]*?wp-embedded-content/', $html )
	) {
		wp_enqueue_script( 'wp-embed' );
	}
	return $html;
}

/**
 * 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 sanitize_url( 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 );

$secret     = wp_generate_password( 10, false );
	$embed_url .= "#?secret={$secret}";

$output = sprintf(
		'<blockquote class="wp-embedded-content" data-secret="%1$s"><a href="%2$s">%3$s</a></blockquote>',
		esc_attr( $secret ),
		esc_url( get_permalink( $post ) ),
		get_the_title( $post )
	);

$output .= sprintf(
		'<iframe sandbox="allow-scripts" security="restricted" src="%1$s" width="%2$d" height="%3$d" title="%4$s" data-secret="%5$s" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe>',
		esc_url( $embed_url ),
		absint( $width ),
		absint( $height ),
		esc_attr(
			sprintf(
				/* translators: 1: Post title, 2: Site title. */
				__( '&#8220;%1$s&#8221; &#8212; %2$s' ),
				get_the_title( $post ),
				get_bloginfo( 'name' )
			)
		),
		esc_attr( $secret )
	);

/*
	 * Note that the script must be placed after the <blockquote> and <iframe> due to a regexp parsing issue in
	 * `wp_filter_oembed_result()`. Because of the regex pattern starts with `|(<blockquote>.*?</blockquote>)?.*|`
	 * wherein the <blockquote> is marked as being optional, if it is not at the beginning of the string then the group
	 * will fail to match and everything will be matched by `.*` and not included in the group. This regex issue goes
	 * back to WordPress 4.4, so in order to not break older installs this script must come at the end.
	 */
	$output .= wp_get_inline_script_tag(
		file_get_contents( ABSPATH . WPINC . '/js/wp-embed' . wp_scripts_get_suffix() . '.js' )
	);

/**
	 * 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
 * @since 6.8.0 Output was adjusted to only embed if the post type supports it.
 *
 * @param WP_Post|int $post  Post ID or post object.
 * @param int         $width The requested width.
 * @return array|false Response data on success, false if post doesn't exist,
 *                     is not publicly viewable or post type is not embeddable.
 */
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;
	}

if ( ! is_post_embeddable( $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( (int) 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 `<link>` 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' => '',
				'port' => null,
				'path' => '/',
			)
		);

$qv = array(
			'domain'                 => $url_parts['host'] . ( $url_parts['port'] ? ':' . $url_parts['port'] : '' ),
			'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, 0 ) );
		$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_Response $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( '<oembed></oembed>' );
	}

foreach ( $data as $key => $value ) {
		if ( is_numeric( $key ) ) {
			$key = 'oembed';
		}

if ( is_array( $value ) ) {
			$item = $node->addChild( $key );
			_oembed_create_xml( $value, $item );
		} else {
			$node->addChild( $key, esc_html( $value ) );
		}
	}

return $node->asXML();
}

/**
 * Filters the given oEmbed HTML to make sure iframes have a title attribute.
 *
 * @since 5.2.0
 *
 * @param string $result The oEmbed HTML result.
 * @param object $data   A data object result from an oEmbed provider.
 * @param string $url    The URL of the content to be embedded.
 * @return string The filtered oEmbed result.
 */
function wp_filter_oembed_iframe_title_attribute( $result, $data, $url ) {
	if ( false === $result || ! in_array( $data->type, array( 'rich', 'video' ), true ) ) {
		return $result;
	}

$title = ! empty( $data->title ) ? $data->title : '';

$pattern = '`<iframe([^>]*)>`i';
	if ( preg_match( $pattern, $result, $matches ) ) {
		$attrs = wp_kses_hair( $matches[1], wp_allowed_protocols() );

foreach ( $attrs as $attr => $item ) {
			$lower_attr = strtolower( $attr );
			if ( $lower_attr === $attr ) {
				continue;
			}
			if ( ! isset( $attrs[ $lower_attr ] ) ) {
				$attrs[ $lower_attr ] = $item;
				unset( $attrs[ $attr ] );
			}
		}
	}

if ( ! empty( $attrs['title']['value'] ) ) {
		$title = $attrs['title']['value'];
	}

/**
	 * Filters the title attribute of the given oEmbed HTML iframe.
	 *
	 * @since 5.2.0
	 *
	 * @param string $title  The title attribute.
	 * @param string $result The oEmbed HTML result.
	 * @param object $data   A data object result from an oEmbed provider.
	 * @param string $url    The URL of the content to be embedded.
	 */
	$title = apply_filters( 'oembed_iframe_title_attribute', $title, $result, $data, $url );

if ( '' === $title ) {
		return $result;
	}

if ( isset( $attrs['title'] ) ) {
		unset( $attrs['title'] );
		$attr_string = implode( ' ', wp_list_pluck( $attrs, 'whole' ) );
		$result      = str_replace( $matches[0], '<iframe ' . trim( $attr_string ) . '>', $result );
	}
	return str_ireplace( '<iframe ', sprintf( '<iframe title="%s" ', esc_attr( $title ) ), $result );
}

/**
 * Filters the given oEmbed HTML.
 *
 * If the `$url` isn't on the trusted providers list,
 * we need to filter the HTML heavily for security.
 *
 * Only filters 'rich' and 'video' response types.
 *
 * @since 4.4.0
 *
 * @param string $result The oEmbed HTML result.
 * @param object $data   A data object result from an oEmbed provider.
 * @param string $url    The URL of the content to be embedded.
 * @return string The filtered and sanitized oEmbed result.
 */
function wp_filter_oembed_result( $result, $data, $url ) {
	if ( false === $result || ! in_array( $data->type, array( 'rich', 'video' ), true ) ) {
		return $result;
	}

$wp_oembed = _wp_oembed_get_object();

// Don't modify the HTML for trusted providers.
	if ( false !== $wp_oembed->get_provider( $url, array( 'discover' => false ) ) ) {
		return $result;
	}

$allowed_html = array(
		'a'          => array(
			'href' => true,
		),
		'blockquote' => array(),
		'iframe'     => array(
			'src'          => true,
			'width'        => true,
			'height'       => true,
			'frameborder'  => true,
			'marginwidth'  => true,
			'marginheight' => true,
			'scrolling'    => true,
			'title'        => true,
		),
	);

$html = wp_kses( $result, $allowed_html );

preg_match( '|(<blockquote>.*?</blockquote>)?.*(<iframe.*?></iframe>)|ms', $html, $content );
	// We require at least the iframe to exist.
	if ( empty( $content[2] ) ) {
		return false;
	}
	$html = $content[1] . $content[2];

preg_match( '/ src=([\'"])(.*?)\1/', $html, $results );

if ( ! empty( $results ) ) {
		$secret = wp_generate_password( 10, false );

$url = esc_url( "{$results[2]}#?secret=$secret" );
		$q   = $results[1];

$html = str_replace( $results[0], ' src=' . $q . $url . $q . ' data-secret=' . $q . $secret . $q, $html );
		$html = str_replace( '<blockquote', "<blockquote data-secret=\"$secret\"", $html );
	}

$allowed_html['blockquote']['data-secret'] = true;
	$allowed_html['iframe']['data-secret']     = true;

$html = wp_kses( $html, $allowed_html );

if ( ! empty( $content[1] ) ) {
		// We have a blockquote to fall back on. Hide the iframe by default.
		$html = str_replace( '<iframe', '<iframe style="position: absolute; visibility: hidden;"', $html );
		$html = str_replace( '<blockquote', '<blockquote class="wp-embedded-content"', $html );
	}

$html = str_ireplace( '<iframe', '<iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted"', $html );

return $html;
}

/**
 * Filters the string in the 'more' link displayed after a trimmed excerpt.
 *
 * Replaces '[...]' (appended to automatically generated excerpts) with an
 * ellipsis and a "Continue reading" link in the embed template.
 *
 * @since 4.4.0
 *
 * @param string $more_string Default 'more' string.
 * @return string 'Continue reading' link prepended with an ellipsis.
 */
function wp_embed_excerpt_more( $more_string ) {
	if ( ! is_embed() ) {
		return $more_string;
	}

$link = sprintf(
		'<a href="%1$s" class="wp-embed-more" target="_top">%2$s</a>',
		esc_url( get_permalink() ),
		/* translators: %s: Post title. */
		sprintf( __( 'Continue reading %s' ), '<span class="screen-reader-text">' . get_the_title() . '</span>' )
	);
	return ' &hellip; ' . $link;
}

/**
 * Displays the post excerpt for the embed template.
 *
 * Intended to be used in 'The Loop'.
 *
 * @since 4.4.0
 */
function the_excerpt_embed() {
	$output = get_the_excerpt();

/**
	 * Filters the post excerpt for the embed template.
	 *
	 * @since 4.4.0
	 *
	 * @param string $output The current post excerpt.
	 */
	echo apply_filters( 'the_excerpt_embed', $output );
}

/**
 * Filters the post excerpt for the embed template.
 *
 * Shows players for video and audio attachments.
 *
 * @since 4.4.0
 *
 * @param string $content The current post excerpt.
 * @return string The modified post excerpt.
 */
function wp_embed_excerpt_attachment( $content ) {
	if ( is_attachment() ) {
		return prepend_attachment( '' );
	}

return $content;
}

/**
 * Enqueues embed iframe default CSS and JS.
 *
 * Enqueue PNG fallback CSS for embed iframe for legacy versions of IE.
 *
 * Allows plugins to queue scripts for the embed iframe end using wp_enqueue_script().
 * Runs first in oembed_head().
 *
 * @since 4.4.0
 */
function enqueue_embed_scripts() {
	wp_enqueue_style( 'wp-embed-template-ie' );

/**
	 * Fires when scripts and styles are enqueued for the embed iframe.
	 *
	 * @since 4.4.0
	 */
	do_action( 'enqueue_embed_scripts' );
}

/**
 * Enqueues the CSS in the embed iframe header.
 *
 * @since 6.4.0
 */
function wp_enqueue_embed_styles() {
	// Back-compat for plugins that disable functionality by unhooking this action.
	if ( ! has_action( 'embed_head', 'print_embed_styles' ) ) {
		return;
	}
	remove_action( 'embed_head', 'print_embed_styles' );

$suffix = wp_scripts_get_suffix();
	$handle = 'wp-embed-template';
	wp_register_style( $handle, false );
	wp_add_inline_style( $handle, file_get_contents( ABSPATH . WPINC . "/css/wp-embed-template$suffix.css" ) );
	wp_enqueue_style( $handle );
}

/**
 * Prints the JavaScript in the embed iframe header.
 *
 * @since 4.4.0
 */
function print_embed_scripts() {
	wp_print_inline_script_tag(
		file_get_contents( ABSPATH . WPINC . '/js/wp-embed-template' . wp_scripts_get_suffix() . '.js' )
	);
}

/**
 * Prepare the oembed HTML to be displayed in an RSS feed.
 *
 * @since 4.4.0
 * @access private
 *
 * @param string $content The content to filter.
 * @return string The filtered content.
 */
function _oembed_filter_feed_content( $content ) {
	$p = new WP_HTML_Tag_Processor( $content );
	while ( $p->next_tag( array( 'tag_name' => 'iframe' ) ) ) {
		if ( $p->has_class( 'wp-embedded-content' ) ) {
			$p->remove_attribute( 'style' );
		}
	}
	return $p->get_updated_html();
}

/**
 * Prints the necessary markup for the embed comments button.
 *
 * @since 4.4.0
 */
function print_embed_comments_button() {
	if ( is_404() || ! ( get_comments_number() || comments_open() ) ) {
		return;
	}
	?>
	<div class="wp-embed-comments">
		<a href="<?php comments_link(); ?>" target="_top">
			<span class="dashicons dashicons-admin-comments"></span>
			<?php
			printf(
				/* translators: %s: Number of comments. */
				_n(
					'%s <span class="screen-reader-text">Comment</span>',
					'%s <span class="screen-reader-text">Comments</span>',
					get_comments_number()
				),
				number_format_i18n( get_comments_number() )
			);
			?>
		</a>
	</div>
	<?php
}

/**
 * Prints the necessary markup for the embed sharing button.
 *
 * @since 4.4.0
 */
function print_embed_sharing_button() {
	if ( is_404() ) {
		return;
	}
	?>
	<div class="wp-embed-share">
		<button type="button" class="wp-embed-share-dialog-open" aria-label="<?php esc_attr_e( 'Open sharing dialog' ); ?>">
			<span class="dashicons dashicons-share"></span>
		</button>
	</div>
	<?php
}

/**
 * Prints the necessary markup for the embed sharing dialog.
 *
 * @since 4.4.0
 */
function print_embed_sharing_dialog() {
	if ( is_404() ) {
		return;
	}

$unique_suffix            = get_the_ID() . '-' . wp_rand();
	$share_tab_wordpress_id   = 'wp-embed-share-tab-wordpress-' . $unique_suffix;
	$share_tab_html_id        = 'wp-embed-share-tab-html-' . $unique_suffix;
	$description_wordpress_id = 'wp-embed-share-description-wordpress-' . $unique_suffix;
	$description_html_id      = 'wp-embed-share-description-html-' . $unique_suffix;
	?>
	<div class="wp-embed-share-dialog hidden" role="dialog" aria-label="<?php esc_attr_e( 'Sharing options' ); ?>">
		<div class="wp-embed-share-dialog-content">
			<div class="wp-embed-share-dialog-text">
				<ul class="wp-embed-share-tabs" role="tablist">
					<li class="wp-embed-share-tab-button wp-embed-share-tab-button-wordpress" role="presentation">
						<button type="button" role="tab" aria-controls="<?php echo $share_tab_wordpress_id; ?>" aria-selected="true" tabindex="0"><?php esc_html_e( 'WordPress Embed' ); ?></button>
					</li>
					<li class="wp-embed-share-tab-button wp-embed-share-tab-button-html" role="presentation">
						<button type="button" role="tab" aria-controls="<?php echo $share_tab_html_id; ?>" aria-selected="false" tabindex="-1"><?php esc_html_e( 'HTML Embed' ); ?></button>
					</li>
				</ul>
				<div id="<?php echo $share_tab_wordpress_id; ?>" class="wp-embed-share-tab" role="tabpanel" aria-hidden="false">
					<input type="text" value="<?php the_permalink(); ?>" class="wp-embed-share-input" aria-label="<?php esc_attr_e( 'URL' ); ?>" aria-describedby="<?php echo $description_wordpress_id; ?>" tabindex="0" readonly/>

<p class="wp-embed-share-description" id="<?php echo $description_wordpress_id; ?>">
						<?php _e( 'Copy and paste this URL into your WordPress site to embed' ); ?>
					</p>
				</div>
				<div id="<?php echo $share_tab_html_id; ?>" class="wp-embed-share-tab" role="tabpanel" aria-hidden="true">
					<textarea class="wp-embed-share-input" aria-label="<?php esc_attr_e( 'HTML' ); ?>" aria-describedby="<?php echo $description_html_id; ?>" tabindex="0" readonly><?php echo esc_textarea( get_post_embed_html( 600, 400 ) ); ?></textarea>

<button type="button" class="wp-embed-share-dialog-close" aria-label="<?php esc_attr_e( 'Close sharing dialog' ); ?>">
				<span class="dashicons dashicons-no"></span>
			</button>
		</div>
	</div>
	<?php
}

/**
 * Prints the necessary markup for the site title in an embed template.
 *
 * @since 4.5.0
 */
function the_embed_site_title() {
	$site_title = sprintf(
		'<a href="%s" target="_top"><img src="%s" srcset="%s 2x" width="32" height="32" alt="" class="wp-embed-site-icon" /><span>%s</span></a>',
		esc_url( home_url() ),
		esc_url( get_site_icon_url( 32, includes_url( 'images/w-logo-blue.png' ) ) ),
		esc_url( get_site_icon_url( 64, includes_url( 'images/w-logo-blue.png' ) ) ),
		esc_html( get_bloginfo( 'name' ) )
	);

$site_title = '<div class="wp-embed-site-title">' . $site_title . '</div>';

/**
	 * Filters the site title HTML in the embed footer.
	 *
	 * @since 4.4.0
	 *
	 * @param string $site_title The site title HTML.
	 */
	echo apply_filters( 'embed_site_title_html', $site_title );
}

/**
 * Filters the oEmbed result before any HTTP requests are made.
 *
 * If the URL belongs to the current site, the result is fetched directly instead of
 * going through the oEmbed discovery process.
 *
 * @since 4.5.3
 *
 * @param null|string $result The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. Default null.
 * @param string      $url    The URL that should be inspected for discovery `<link>` tags.
 * @param array       $args   oEmbed remote get arguments.
 * @return null|string The UNSANITIZED (and potentially unsafe) HTML that should be used to embed.
 *                     Null if the URL does not belong to the current site.
 */
function wp_filter_pre_oembed_result( $result, $url, $args ) {
	$data = get_oembed_response_data_for_url( $url, $args );

if ( $data ) {
		return _wp_oembed_get_object()->data2html( $data, $url );
	}

return $result;
}

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