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1 <?php
2 /**
3  * oEmbed API: Top-level oEmbed functionality
4  *
5  * @package WordPress
6  * @subpackage oEmbed
7  * @since 4.4.0
8  */
9
10 /**
11  * Registers an embed handler.
12  *
13  * Should probably only be used for sites that do not support oEmbed.
14  *
15  * @since 2.9.0
16  *
17  * @global WP_Embed $wp_embed
18  *
19  * @param string   $id       An internal ID/name for the handler. Needs to be unique.
20  * @param string   $regex    The regex that will be used to see if this handler should be used for a URL.
21  * @param callable $callback The callback function that will be called if the regex is matched.
22  * @param int      $priority Optional. Used to specify the order in which the registered handlers will
23  *                           be tested. Default 10.
24  */
25 function wp_embed_register_handler( $id, $regex, $callback, $priority = 10 ) {
26         global $wp_embed;
27         $wp_embed->register_handler( $id, $regex, $callback, $priority );
28 }
29
30 /**
31  * Unregisters a previously-registered embed handler.
32  *
33  * @since 2.9.0
34  *
35  * @global WP_Embed $wp_embed
36  *
37  * @param string $id       The handler ID that should be removed.
38  * @param int    $priority Optional. The priority of the handler to be removed. Default 10.
39  */
40 function wp_embed_unregister_handler( $id, $priority = 10 ) {
41         global $wp_embed;
42         $wp_embed->unregister_handler( $id, $priority );
43 }
44
45 /**
46  * Creates default array of embed parameters.
47  *
48  * The width defaults to the content width as specified by the theme. If the
49  * theme does not specify a content width, then 500px is used.
50  *
51  * The default height is 1.5 times the width, or 1000px, whichever is smaller.
52  *
53  * The {@see 'embed_defaults'} filter can be used to adjust either of these values.
54  *
55  * @since 2.9.0
56  *
57  * @global int $content_width
58  *
59  * @param string $url Optional. The URL that should be embedded. Default empty.
60  *
61  * @return array Default embed parameters.
62  */
63 function wp_embed_defaults( $url = '' ) {
64         if ( ! empty( $GLOBALS['content_width'] ) )
65                 $width = (int) $GLOBALS['content_width'];
66
67         if ( empty( $width ) )
68                 $width = 500;
69
70         $height = min( ceil( $width * 1.5 ), 1000 );
71
72         /**
73          * Filters the default array of embed dimensions.
74          *
75          * @since 2.9.0
76          *
77          * @param array  $size An array of embed width and height values
78          *                     in pixels (in that order).
79          * @param string $url  The URL that should be embedded.
80          */
81         return apply_filters( 'embed_defaults', compact( 'width', 'height' ), $url );
82 }
83
84 /**
85  * Attempts to fetch the embed HTML for a provided URL using oEmbed.
86  *
87  * @since 2.9.0
88  *
89  * @see WP_oEmbed
90  *
91  * @param string $url  The URL that should be embedded.
92  * @param array  $args Optional. Additional arguments and parameters for retrieving embed HTML.
93  *                     Default empty.
94  * @return false|string False on failure or the embed HTML on success.
95  */
96 function wp_oembed_get( $url, $args = '' ) {
97         require_once( ABSPATH . WPINC . '/class-oembed.php' );
98         $oembed = _wp_oembed_get_object();
99         return $oembed->get_html( $url, $args );
100 }
101
102 /**
103  * Adds a URL format and oEmbed provider URL pair.
104  *
105  * @since 2.9.0
106  *
107  * @see WP_oEmbed
108  *
109  * @param string  $format   The format of URL that this provider can handle. You can use asterisks
110  *                          as wildcards.
111  * @param string  $provider The URL to the oEmbed provider.
112  * @param boolean $regex    Optional. Whether the `$format` parameter is in a RegEx format. Default false.
113  */
114 function wp_oembed_add_provider( $format, $provider, $regex = false ) {
115         require_once( ABSPATH . WPINC . '/class-oembed.php' );
116
117         if ( did_action( 'plugins_loaded' ) ) {
118                 $oembed = _wp_oembed_get_object();
119                 $oembed->providers[$format] = array( $provider, $regex );
120         } else {
121                 WP_oEmbed::_add_provider_early( $format, $provider, $regex );
122         }
123 }
124
125 /**
126  * Removes an oEmbed provider.
127  *
128  * @since 3.5.0
129  *
130  * @see WP_oEmbed
131  *
132  * @param string $format The URL format for the oEmbed provider to remove.
133  * @return bool Was the provider removed successfully?
134  */
135 function wp_oembed_remove_provider( $format ) {
136         require_once( ABSPATH . WPINC . '/class-oembed.php' );
137
138         if ( did_action( 'plugins_loaded' ) ) {
139                 $oembed = _wp_oembed_get_object();
140
141                 if ( isset( $oembed->providers[ $format ] ) ) {
142                         unset( $oembed->providers[ $format ] );
143                         return true;
144                 }
145         } else {
146                 WP_oEmbed::_remove_provider_early( $format );
147         }
148
149         return false;
150 }
151
152 /**
153  * Determines if default embed handlers should be loaded.
154  *
155  * Checks to make sure that the embeds library hasn't already been loaded. If
156  * it hasn't, then it will load the embeds library.
157  *
158  * @since 2.9.0
159  *
160  * @see wp_embed_register_handler()
161  */
162 function wp_maybe_load_embeds() {
163         /**
164          * Filters whether to load the default embed handlers.
165          *
166          * Returning a falsey value will prevent loading the default embed handlers.
167          *
168          * @since 2.9.0
169          *
170          * @param bool $maybe_load_embeds Whether to load the embeds library. Default true.
171          */
172         if ( ! apply_filters( 'load_default_embeds', true ) ) {
173                 return;
174         }
175
176         wp_embed_register_handler( 'youtube_embed_url', '#https?://(www.)?youtube\.com/(?:v|embed)/([^/]+)#i', 'wp_embed_handler_youtube' );
177
178         /**
179          * Filters the audio embed handler callback.
180          *
181          * @since 3.6.0
182          *
183          * @param callable $handler Audio embed handler callback function.
184          */
185         wp_embed_register_handler( 'audio', '#^https?://.+?\.(' . join( '|', wp_get_audio_extensions() ) . ')$#i', apply_filters( 'wp_audio_embed_handler', 'wp_embed_handler_audio' ), 9999 );
186
187         /**
188          * Filters the video embed handler callback.
189          *
190          * @since 3.6.0
191          *
192          * @param callable $handler Video embed handler callback function.
193          */
194         wp_embed_register_handler( 'video', '#^https?://.+?\.(' . join( '|', wp_get_video_extensions() ) . ')$#i', apply_filters( 'wp_video_embed_handler', 'wp_embed_handler_video' ), 9999 );
195 }
196
197 /**
198  * YouTube iframe embed handler callback.
199  *
200  * Catches YouTube iframe embed URLs that are not parsable by oEmbed but can be translated into a URL that is.
201  *
202  * @since 4.0.0
203  *
204  * @global WP_Embed $wp_embed
205  *
206  * @param array  $matches The RegEx matches from the provided regex when calling
207  *                        wp_embed_register_handler().
208  * @param array  $attr    Embed attributes.
209  * @param string $url     The original URL that was matched by the regex.
210  * @param array  $rawattr The original unmodified attributes.
211  * @return string The embed HTML.
212  */
213 function wp_embed_handler_youtube( $matches, $attr, $url, $rawattr ) {
214         global $wp_embed;
215         $embed = $wp_embed->autoembed( "https://youtube.com/watch?v={$matches[2]}" );
216
217         /**
218          * Filters the YoutTube embed output.
219          *
220          * @since 4.0.0
221          *
222          * @see wp_embed_handler_youtube()
223          *
224          * @param string $embed   YouTube embed output.
225          * @param array  $attr    An array of embed attributes.
226          * @param string $url     The original URL that was matched by the regex.
227          * @param array  $rawattr The original unmodified attributes.
228          */
229         return apply_filters( 'wp_embed_handler_youtube', $embed, $attr, $url, $rawattr );
230 }
231
232 /**
233  * Audio embed handler callback.
234  *
235  * @since 3.6.0
236  *
237  * @param array  $matches The RegEx matches from the provided regex when calling wp_embed_register_handler().
238  * @param array  $attr Embed attributes.
239  * @param string $url The original URL that was matched by the regex.
240  * @param array  $rawattr The original unmodified attributes.
241  * @return string The embed HTML.
242  */
243 function wp_embed_handler_audio( $matches, $attr, $url, $rawattr ) {
244         $audio = sprintf( '[audio src="%s" /]', esc_url( $url ) );
245
246         /**
247          * Filters the audio embed output.
248          *
249          * @since 3.6.0
250          *
251          * @param string $audio   Audio embed output.
252          * @param array  $attr    An array of embed attributes.
253          * @param string $url     The original URL that was matched by the regex.
254          * @param array  $rawattr The original unmodified attributes.
255          */
256         return apply_filters( 'wp_embed_handler_audio', $audio, $attr, $url, $rawattr );
257 }
258
259 /**
260  * Video embed handler callback.
261  *
262  * @since 3.6.0
263  *
264  * @param array  $matches The RegEx matches from the provided regex when calling wp_embed_register_handler().
265  * @param array  $attr    Embed attributes.
266  * @param string $url     The original URL that was matched by the regex.
267  * @param array  $rawattr The original unmodified attributes.
268  * @return string The embed HTML.
269  */
270 function wp_embed_handler_video( $matches, $attr, $url, $rawattr ) {
271         $dimensions = '';
272         if ( ! empty( $rawattr['width'] ) && ! empty( $rawattr['height'] ) ) {
273                 $dimensions .= sprintf( 'width="%d" ', (int) $rawattr['width'] );
274                 $dimensions .= sprintf( 'height="%d" ', (int) $rawattr['height'] );
275         }
276         $video = sprintf( '[video %s src="%s" /]', $dimensions, esc_url( $url ) );
277
278         /**
279          * Filters the video embed output.
280          *
281          * @since 3.6.0
282          *
283          * @param string $video   Video embed output.
284          * @param array  $attr    An array of embed attributes.
285          * @param string $url     The original URL that was matched by the regex.
286          * @param array  $rawattr The original unmodified attributes.
287          */
288         return apply_filters( 'wp_embed_handler_video', $video, $attr, $url, $rawattr );
289 }
290
291 /**
292  * Registers the oEmbed REST API route.
293  *
294  * @since 4.4.0
295  */
296 function wp_oembed_register_route() {
297         $controller = new WP_oEmbed_Controller();
298         $controller->register_routes();
299 }
300
301 /**
302  * Adds oEmbed discovery links in the website <head>.
303  *
304  * @since 4.4.0
305  */
306 function wp_oembed_add_discovery_links() {
307         $output = '';
308
309         if ( is_singular() ) {
310                 $output .= '<link rel="alternate" type="application/json+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink() ) ) . '" />' . "\n";
311
312                 if ( class_exists( 'SimpleXMLElement' ) ) {
313                         $output .= '<link rel="alternate" type="text/xml+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink(), 'xml' ) ) . '" />' . "\n";
314                 }
315         }
316
317         /**
318          * Filters the oEmbed discovery links HTML.
319          *
320          * @since 4.4.0
321          *
322          * @param string $output HTML of the discovery links.
323          */
324         echo apply_filters( 'oembed_discovery_links', $output );
325 }
326
327 /**
328  * Adds the necessary JavaScript to communicate with the embedded iframes.
329  *
330  * @since 4.4.0
331  */
332 function wp_oembed_add_host_js() {
333         wp_enqueue_script( 'wp-embed' );
334 }
335
336 /**
337  * Retrieves the URL to embed a specific post in an iframe.
338  *
339  * @since 4.4.0
340  *
341  * @param int|WP_Post $post Optional. Post ID or object. Defaults to the current post.
342  * @return string|false The post embed URL on success, false if the post doesn't exist.
343  */
344 function get_post_embed_url( $post = null ) {
345         $post = get_post( $post );
346
347         if ( ! $post ) {
348                 return false;
349         }
350
351         $embed_url     = trailingslashit( get_permalink( $post ) ) . user_trailingslashit( 'embed' );
352         $path_conflict = get_page_by_path( str_replace( home_url(), '', $embed_url ), OBJECT, get_post_types( array( 'public' => true ) ) );
353
354         if ( ! get_option( 'permalink_structure' ) || $path_conflict ) {
355                 $embed_url = add_query_arg( array( 'embed' => 'true' ), get_permalink( $post ) );
356         }
357
358         /**
359          * Filters the URL to embed a specific post.
360          *
361          * @since 4.4.0
362          *
363          * @param string  $embed_url The post embed URL.
364          * @param WP_Post $post      The corresponding post object.
365          */
366         return esc_url_raw( apply_filters( 'post_embed_url', $embed_url, $post ) );
367 }
368
369 /**
370  * Retrieves the oEmbed endpoint URL for a given permalink.
371  *
372  * Pass an empty string as the first argument to get the endpoint base URL.
373  *
374  * @since 4.4.0
375  *
376  * @param string $permalink Optional. The permalink used for the `url` query arg. Default empty.
377  * @param string $format    Optional. The requested response format. Default 'json'.
378  * @return string The oEmbed endpoint URL.
379  */
380 function get_oembed_endpoint_url( $permalink = '', $format = 'json' ) {
381         $url = rest_url( 'oembed/1.0/embed' );
382
383         if ( 'json' === $format ) {
384                 $format = false;
385         }
386
387         if ( '' !== $permalink ) {
388                 $url = add_query_arg( array(
389                         'url'    => urlencode( $permalink ),
390                         'format' => $format,
391                 ), $url );
392         }
393
394         /**
395          * Filters the oEmbed endpoint URL.
396          *
397          * @since 4.4.0
398          *
399          * @param string $url       The URL to the oEmbed endpoint.
400          * @param string $permalink The permalink used for the `url` query arg.
401          * @param string $format    The requested response format.
402          */
403         return apply_filters( 'oembed_endpoint_url', $url, $permalink, $format );
404 }
405
406 /**
407  * Retrieves the embed code for a specific post.
408  *
409  * @since 4.4.0
410  *
411  * @param int         $width  The width for the response.
412  * @param int         $height The height for the response.
413  * @param int|WP_Post $post   Optional. Post ID or object. Default is global `$post`.
414  * @return string|false Embed code on success, false if post doesn't exist.
415  */
416 function get_post_embed_html( $width, $height, $post = null ) {
417         $post = get_post( $post );
418
419         if ( ! $post ) {
420                 return false;
421         }
422
423         $embed_url = get_post_embed_url( $post );
424
425         $output = '<blockquote class="wp-embedded-content"><a href="' . esc_url( get_permalink( $post ) ) . '">' . get_the_title( $post ) . "</a></blockquote>\n";
426
427         $output .= "<script type='text/javascript'>\n";
428         $output .= "<!--//--><![CDATA[//><!--\n";
429         if ( SCRIPT_DEBUG ) {
430                 $output .= file_get_contents( ABSPATH . WPINC . '/js/wp-embed.js' );
431         } else {
432                 /*
433                  * If you're looking at a src version of this file, you'll see an "include"
434                  * statement below. This is used by the `grunt build` process to directly
435                  * include a minified version of wp-embed.js, instead of using the
436                  * file_get_contents() method from above.
437                  *
438                  * If you're looking at a build version of this file, you'll see a string of
439                  * minified JavaScript. If you need to debug it, please turn on SCRIPT_DEBUG
440                  * and edit wp-embed.js directly.
441                  */
442                 $output .=<<<JS
443                 !function(a,b){"use strict";function c(){if(!e){e=!0;var a,c,d,f,g=-1!==navigator.appVersion.indexOf("MSIE 10"),h=!!navigator.userAgent.match(/Trident.*rv:11\./),i=b.querySelectorAll("iframe.wp-embedded-content");for(c=0;c<i.length;c++)if(d=i[c],!d.getAttribute("data-secret")){if(f=Math.random().toString(36).substr(2,10),d.src+="#?secret="+f,d.setAttribute("data-secret",f),g||h)a=d.cloneNode(!0),a.removeAttribute("security"),d.parentNode.replaceChild(a,d)}else;}}var d=!1,e=!1;if(b.querySelector)if(a.addEventListener)d=!0;if(a.wp=a.wp||{},!a.wp.receiveEmbedMessage)if(a.wp.receiveEmbedMessage=function(c){var d=c.data;if(d.secret||d.message||d.value)if(!/[^a-zA-Z0-9]/.test(d.secret)){var e,f,g,h,i,j=b.querySelectorAll('iframe[data-secret="'+d.secret+'"]'),k=b.querySelectorAll('blockquote[data-secret="'+d.secret+'"]');for(e=0;e<k.length;e++)k[e].style.display="none";for(e=0;e<j.length;e++)if(f=j[e],c.source===f.contentWindow){if(f.removeAttribute("style"),"height"===d.message){if(g=parseInt(d.value,10),g>1e3)g=1e3;else if(~~g<200)g=200;f.height=g}if("link"===d.message)if(h=b.createElement("a"),i=b.createElement("a"),h.href=f.getAttribute("src"),i.href=d.value,i.host===h.host)if(b.activeElement===f)a.top.location.href=d.value}else;}},d)a.addEventListener("message",a.wp.receiveEmbedMessage,!1),b.addEventListener("DOMContentLoaded",c,!1),a.addEventListener("load",c,!1)}(window,document);
444 JS;
445         }
446         $output .= "\n//--><!]]>";
447         $output .= "\n</script>";
448
449         $output .= sprintf(
450                 '<iframe sandbox="allow-scripts" security="restricted" src="%1$s" width="%2$d" height="%3$d" title="%4$s" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe>',
451                 esc_url( $embed_url ),
452                 absint( $width ),
453                 absint( $height ),
454                 esc_attr(
455                         sprintf(
456                                 /* translators: 1: post title, 2: site name */
457                                 __( '&#8220;%1$s&#8221; &#8212; %2$s' ),
458                                 get_the_title( $post ),
459                                 get_bloginfo( 'name' )
460                         )
461                 )
462         );
463
464         /**
465          * Filters the embed HTML output for a given post.
466          *
467          * @since 4.4.0
468          *
469          * @param string  $output The default HTML.
470          * @param WP_Post $post   Current post object.
471          * @param int     $width  Width of the response.
472          * @param int     $height Height of the response.
473          */
474         return apply_filters( 'embed_html', $output, $post, $width, $height );
475 }
476
477 /**
478  * Retrieves the oEmbed response data for a given post.
479  *
480  * @since 4.4.0
481  *
482  * @param WP_Post|int $post  Post object or ID.
483  * @param int         $width The requested width.
484  * @return array|false Response data on success, false if post doesn't exist.
485  */
486 function get_oembed_response_data( $post, $width ) {
487         $post  = get_post( $post );
488         $width = absint( $width );
489
490         if ( ! $post ) {
491                 return false;
492         }
493
494         if ( 'publish' !== get_post_status( $post ) ) {
495                 return false;
496         }
497
498         /**
499          * Filters the allowed minimum and maximum widths for the oEmbed response.
500          *
501          * @since 4.4.0
502          *
503          * @param array $min_max_width {
504          *     Minimum and maximum widths for the oEmbed response.
505          *
506          *     @type int $min Minimum width. Default 200.
507          *     @type int $max Maximum width. Default 600.
508          * }
509          */
510         $min_max_width = apply_filters( 'oembed_min_max_width', array(
511                 'min' => 200,
512                 'max' => 600
513         ) );
514
515         $width  = min( max( $min_max_width['min'], $width ), $min_max_width['max'] );
516         $height = max( ceil( $width / 16 * 9 ), 200 );
517
518         $data = array(
519                 'version'       => '1.0',
520                 'provider_name' => get_bloginfo( 'name' ),
521                 'provider_url'  => get_home_url(),
522                 'author_name'   => get_bloginfo( 'name' ),
523                 'author_url'    => get_home_url(),
524                 'title'         => $post->post_title,
525                 'type'          => 'link',
526         );
527
528         $author = get_userdata( $post->post_author );
529
530         if ( $author ) {
531                 $data['author_name'] = $author->display_name;
532                 $data['author_url']  = get_author_posts_url( $author->ID );
533         }
534
535         /**
536          * Filters the oEmbed response data.
537          *
538          * @since 4.4.0
539          *
540          * @param array   $data   The response data.
541          * @param WP_Post $post   The post object.
542          * @param int     $width  The requested width.
543          * @param int     $height The calculated height.
544          */
545         return apply_filters( 'oembed_response_data', $data, $post, $width, $height );
546 }
547
548 /**
549  * Filters the oEmbed response data to return an iframe embed code.
550  *
551  * @since 4.4.0
552  *
553  * @param array   $data   The response data.
554  * @param WP_Post $post   The post object.
555  * @param int     $width  The requested width.
556  * @param int     $height The calculated height.
557  * @return array The modified response data.
558  */
559 function get_oembed_response_data_rich( $data, $post, $width, $height ) {
560         $data['width']  = absint( $width );
561         $data['height'] = absint( $height );
562         $data['type']   = 'rich';
563         $data['html']   = get_post_embed_html( $width, $height, $post );
564
565         // Add post thumbnail to response if available.
566         $thumbnail_id = false;
567
568         if ( has_post_thumbnail( $post->ID ) ) {
569                 $thumbnail_id = get_post_thumbnail_id( $post->ID );
570         }
571
572         if ( 'attachment' === get_post_type( $post ) ) {
573                 if ( wp_attachment_is_image( $post ) ) {
574                         $thumbnail_id = $post->ID;
575                 } else if ( wp_attachment_is( 'video', $post ) ) {
576                         $thumbnail_id = get_post_thumbnail_id( $post );
577                         $data['type'] = 'video';
578                 }
579         }
580
581         if ( $thumbnail_id ) {
582                 list( $thumbnail_url, $thumbnail_width, $thumbnail_height ) = wp_get_attachment_image_src( $thumbnail_id, array( $width, 99999 ) );
583                 $data['thumbnail_url']    = $thumbnail_url;
584                 $data['thumbnail_width']  = $thumbnail_width;
585                 $data['thumbnail_height'] = $thumbnail_height;
586         }
587
588         return $data;
589 }
590
591 /**
592  * Ensures that the specified format is either 'json' or 'xml'.
593  *
594  * @since 4.4.0
595  *
596  * @param string $format The oEmbed response format. Accepts 'json' or 'xml'.
597  * @return string The format, either 'xml' or 'json'. Default 'json'.
598  */
599 function wp_oembed_ensure_format( $format ) {
600         if ( ! in_array( $format, array( 'json', 'xml' ), true ) ) {
601                 return 'json';
602         }
603
604         return $format;
605 }
606
607 /**
608  * Hooks into the REST API output to print XML instead of JSON.
609  *
610  * This is only done for the oEmbed API endpoint,
611  * which supports both formats.
612  *
613  * @access private
614  * @since 4.4.0
615  *
616  * @param bool                      $served  Whether the request has already been served.
617  * @param WP_HTTP_ResponseInterface $result  Result to send to the client. Usually a WP_REST_Response.
618  * @param WP_REST_Request           $request Request used to generate the response.
619  * @param WP_REST_Server            $server  Server instance.
620  * @return true
621  */
622 function _oembed_rest_pre_serve_request( $served, $result, $request, $server ) {
623         $params = $request->get_params();
624
625         if ( '/oembed/1.0/embed' !== $request->get_route() || 'GET' !== $request->get_method() ) {
626                 return $served;
627         }
628
629         if ( ! isset( $params['format'] ) || 'xml' !== $params['format'] ) {
630                 return $served;
631         }
632
633         // Embed links inside the request.
634         $data = $server->response_to_data( $result, false );
635
636         if ( ! class_exists( 'SimpleXMLElement' ) ) {
637                 status_header( 501 );
638                 die( get_status_header_desc( 501 ) );
639         }
640
641         $result = _oembed_create_xml( $data );
642
643         // Bail if there's no XML.
644         if ( ! $result ) {
645                 status_header( 501 );
646                 return get_status_header_desc( 501 );
647         }
648
649         if ( ! headers_sent() ) {
650                 $server->send_header( 'Content-Type', 'text/xml; charset=' . get_option( 'blog_charset' ) );
651         }
652
653         echo $result;
654
655         return true;
656 }
657
658 /**
659  * Creates an XML string from a given array.
660  *
661  * @since 4.4.0
662  * @access private
663  *
664  * @param array            $data The original oEmbed response data.
665  * @param SimpleXMLElement $node Optional. XML node to append the result to recursively.
666  * @return string|false XML string on success, false on error.
667  */
668 function _oembed_create_xml( $data, $node = null ) {
669         if ( ! is_array( $data ) || empty( $data ) ) {
670                 return false;
671         }
672
673         if ( null === $node ) {
674                 $node = new SimpleXMLElement( '<oembed></oembed>' );
675         }
676
677         foreach ( $data as $key => $value ) {
678                 if ( is_numeric( $key ) ) {
679                         $key = 'oembed';
680                 }
681
682                 if ( is_array( $value ) ) {
683                         $item = $node->addChild( $key );
684                         _oembed_create_xml( $value, $item );
685                 } else {
686                         $node->addChild( $key, esc_html( $value ) );
687                 }
688         }
689
690         return $node->asXML();
691 }
692
693 /**
694  * Filters the given oEmbed HTML.
695  *
696  * If the `$url` isn't on the trusted providers list,
697  * we need to filter the HTML heavily for security.
698  *
699  * Only filters 'rich' and 'html' response types.
700  *
701  * @since 4.4.0
702  *
703  * @param string $result The oEmbed HTML result.
704  * @param object $data   A data object result from an oEmbed provider.
705  * @param string $url    The URL of the content to be embedded.
706  * @return string The filtered and sanitized oEmbed result.
707  */
708 function wp_filter_oembed_result( $result, $data, $url ) {
709         if ( false === $result || ! in_array( $data->type, array( 'rich', 'video' ) ) ) {
710                 return $result;
711         }
712
713         require_once( ABSPATH . WPINC . '/class-oembed.php' );
714         $wp_oembed = _wp_oembed_get_object();
715
716         // Don't modify the HTML for trusted providers.
717         if ( false !== $wp_oembed->get_provider( $url, array( 'discover' => false ) ) ) {
718                 return $result;
719         }
720
721         $allowed_html = array(
722                 'a'          => array(
723                         'href'         => true,
724                 ),
725                 'blockquote' => array(),
726                 'iframe'     => array(
727                         'src'          => true,
728                         'width'        => true,
729                         'height'       => true,
730                         'frameborder'  => true,
731                         'marginwidth'  => true,
732                         'marginheight' => true,
733                         'scrolling'    => true,
734                         'title'        => true,
735                 ),
736         );
737
738         $html = wp_kses( $result, $allowed_html );
739
740         preg_match( '|(<blockquote>.*?</blockquote>)?.*(<iframe.*?></iframe>)|ms', $html, $content );
741         // We require at least the iframe to exist.
742         if ( empty( $content[2] ) ) {
743                 return false;
744         }
745         $html = $content[1] . $content[2];
746
747         if ( ! empty( $content[1] ) ) {
748                 // We have a blockquote to fall back on. Hide the iframe by default.
749                 $html = str_replace( '<iframe', '<iframe style="position: absolute; clip: rect(1px, 1px, 1px, 1px);"', $html );
750                 $html = str_replace( '<blockquote', '<blockquote class="wp-embedded-content"', $html );
751         }
752
753         $html = str_replace( '<iframe', '<iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted"', $html );
754
755         preg_match( '/ src=[\'"]([^\'"]*)[\'"]/', $html, $results );
756
757         if ( ! empty( $results ) ) {
758                 $secret = wp_generate_password( 10, false );
759
760                 $url = esc_url( "{$results[1]}#?secret=$secret" );
761
762                 $html = str_replace( $results[0], " src=\"$url\" data-secret=\"$secret\"", $html );
763                 $html = str_replace( '<blockquote', "<blockquote data-secret=\"$secret\"", $html );
764         }
765
766         return $html;
767 }
768
769 /**
770  * Filters the string in the 'more' link displayed after a trimmed excerpt.
771  *
772  * Replaces '[...]' (appended to automatically generated excerpts) with an
773  * ellipsis and a "Continue reading" link in the embed template.
774  *
775  * @since 4.4.0
776  *
777  * @param string $more_string Default 'more' string.
778  * @return string 'Continue reading' link prepended with an ellipsis.
779  */
780 function wp_embed_excerpt_more( $more_string ) {
781         if ( ! is_embed() ) {
782                 return $more_string;
783         }
784
785         $link = sprintf( '<a href="%1$s" class="wp-embed-more" target="_top">%2$s</a>',
786                 esc_url( get_permalink() ),
787                 /* translators: %s: Name of current post */
788                 sprintf( __( 'Continue reading %s' ), '<span class="screen-reader-text">' . get_the_title() . '</span>' )
789         );
790         return ' &hellip; ' . $link;
791 }
792
793 /**
794  * Displays the post excerpt for the embed template.
795  *
796  * Intended to be used in 'The Loop'.
797  *
798  * @since 4.4.0
799  */
800 function the_excerpt_embed() {
801         $output = get_the_excerpt();
802
803         /**
804          * Filters the post excerpt for the embed template.
805          *
806          * @since 4.4.0
807          *
808          * @param string $output The current post excerpt.
809          */
810         echo apply_filters( 'the_excerpt_embed', $output );
811 }
812
813 /**
814  * Filters the post excerpt for the embed template.
815  *
816  * Shows players for video and audio attachments.
817  *
818  * @since 4.4.0
819  *
820  * @param string $content The current post excerpt.
821  * @return string The modified post excerpt.
822  */
823 function wp_embed_excerpt_attachment( $content ) {
824         if ( is_attachment() ) {
825                 return prepend_attachment( '' );
826         }
827
828         return $content;
829 }
830
831 /**
832  * Enqueue embed iframe default CSS and JS & fire do_action('enqueue_embed_scripts')
833  *
834  * Enqueue PNG fallback CSS for embed iframe for legacy versions of IE.
835  *
836  * Allows plugins to queue scripts for the embed iframe end using wp_enqueue_script().
837  * Runs first in oembed_head().
838  *
839  * @since 4.4.0
840  */
841 function enqueue_embed_scripts() {
842         wp_enqueue_style( 'wp-embed-template-ie' );
843
844         /**
845          * Fires when scripts and styles are enqueued for the embed iframe.
846          *
847          * @since 4.4.0
848          */
849         do_action( 'enqueue_embed_scripts' );
850 }
851
852 /**
853  * Prints the CSS in the embed iframe header.
854  *
855  * @since 4.4.0
856  */
857 function print_embed_styles() {
858         ?>
859         <style type="text/css">
860         <?php
861                 if ( SCRIPT_DEBUG ) {
862                         readfile( ABSPATH . WPINC . "/css/wp-embed-template.css" );
863                 } else {
864                         /*
865                          * If you're looking at a src version of this file, you'll see an "include"
866                          * statement below. This is used by the `grunt build` process to directly
867                          * include a minified version of wp-oembed-embed.css, instead of using the
868                          * readfile() method from above.
869                          *
870                          * If you're looking at a build version of this file, you'll see a string of
871                          * minified CSS. If you need to debug it, please turn on SCRIPT_DEBUG
872                          * and edit wp-embed-template.css directly.
873                          */
874                         ?>
875                         body,html{padding:0;margin:0}body{font-family:sans-serif}.wp-embed,.wp-embed-share-input{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif}.screen-reader-text{clip:rect(1px,1px,1px,1px);height:1px;overflow:hidden;position:absolute!important;width:1px}.dashicons{display:inline-block;width:20px;height:20px;background-color:transparent;background-repeat:no-repeat;-webkit-background-size:20px 20px;background-size:20px;background-position:center;-webkit-transition:background .1s ease-in;transition:background .1s ease-in;position:relative;top:5px}.dashicons-no{background-image:url("data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20viewBox%3D%270%200%2020%2020%27%3E%3Cpath%20d%3D%27M15.55%2013.7l-2.19%202.06-3.42-3.65-3.64%203.43-2.06-2.18%203.64-3.43-3.42-3.64%202.18-2.06%203.43%203.64%203.64-3.42%202.05%202.18-3.64%203.43z%27%20fill%3D%27%23fff%27%2F%3E%3C%2Fsvg%3E")}.dashicons-admin-comments{background-image:url("data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20viewBox%3D%270%200%2020%2020%27%3E%3Cpath%20d%3D%27M5%202h9q.82%200%201.41.59T16%204v7q0%20.82-.59%201.41T14%2013h-2l-5%205v-5H5q-.82%200-1.41-.59T3%2011V4q0-.82.59-1.41T5%202z%27%20fill%3D%27%2382878c%27%2F%3E%3C%2Fsvg%3E")}.wp-embed-comments a:hover .dashicons-admin-comments{background-image:url("data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20viewBox%3D%270%200%2020%2020%27%3E%3Cpath%20d%3D%27M5%202h9q.82%200%201.41.59T16%204v7q0%20.82-.59%201.41T14%2013h-2l-5%205v-5H5q-.82%200-1.41-.59T3%2011V4q0-.82.59-1.41T5%202z%27%20fill%3D%27%230073aa%27%2F%3E%3C%2Fsvg%3E")}.dashicons-share{background-image:url("data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20viewBox%3D%270%200%2020%2020%27%3E%3Cpath%20d%3D%27M14.5%2012q1.24%200%202.12.88T17.5%2015t-.88%202.12-2.12.88-2.12-.88T11.5%2015q0-.34.09-.69l-4.38-2.3Q6.32%2013%205%2013q-1.24%200-2.12-.88T2%2010t.88-2.12T5%207q1.3%200%202.21.99l4.38-2.3q-.09-.35-.09-.69%200-1.24.88-2.12T14.5%202t2.12.88T17.5%205t-.88%202.12T14.5%208q-1.3%200-2.21-.99l-4.38%202.3Q8%209.66%208%2010t-.09.69l4.38%202.3q.89-.99%202.21-.99z%27%20fill%3D%27%2382878c%27%2F%3E%3C%2Fsvg%3E");display:none}.js .dashicons-share{display:inline-block}.wp-embed-share-dialog-open:hover .dashicons-share{background-image:url("data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20viewBox%3D%270%200%2020%2020%27%3E%3Cpath%20d%3D%27M14.5%2012q1.24%200%202.12.88T17.5%2015t-.88%202.12-2.12.88-2.12-.88T11.5%2015q0-.34.09-.69l-4.38-2.3Q6.32%2013%205%2013q-1.24%200-2.12-.88T2%2010t.88-2.12T5%207q1.3%200%202.21.99l4.38-2.3q-.09-.35-.09-.69%200-1.24.88-2.12T14.5%202t2.12.88T17.5%205t-.88%202.12T14.5%208q-1.3%200-2.21-.99l-4.38%202.3Q8%209.66%208%2010t-.09.69l4.38%202.3q.89-.99%202.21-.99z%27%20fill%3D%27%230073aa%27%2F%3E%3C%2Fsvg%3E")}.wp-embed{padding:25px;font-size:14px;font-weight:400;line-height:1.5;color:#82878c;background:#fff;border:1px solid #e5e5e5;-webkit-box-shadow:0 1px 1px rgba(0,0,0,.05);box-shadow:0 1px 1px rgba(0,0,0,.05);overflow:auto;zoom:1}.wp-embed a{color:#82878c;text-decoration:none}.wp-embed a:hover{text-decoration:underline}.wp-embed-featured-image{margin-bottom:20px}.wp-embed-featured-image img{width:100%;height:auto;border:none}.wp-embed-featured-image.square{float:left;max-width:160px;margin-right:20px}.wp-embed p{margin:0}p.wp-embed-heading{margin:0 0 15px;font-weight:600;font-size:22px;line-height:1.3}.wp-embed-heading a{color:#32373c}.wp-embed .wp-embed-more{color:#b4b9be}.wp-embed-footer{display:table;width:100%;margin-top:30px}.wp-embed-site-icon{position:absolute;top:50%;left:0;-webkit-transform:translateY(-50%);-ms-transform:translateY(-50%);transform:translateY(-50%);height:25px;width:25px;border:0}.wp-embed-site-title{font-weight:600;line-height:25px}.wp-embed-site-title a{position:relative;display:inline-block;padding-left:35px}.wp-embed-meta,.wp-embed-site-title{display:table-cell}.wp-embed-meta{text-align:right;white-space:nowrap;vertical-align:middle}.wp-embed-comments,.wp-embed-share{display:inline}.wp-embed-comments a,.wp-embed-share-tab-button{display:inline-block}.wp-embed-meta a:hover{text-decoration:none;color:#0073aa}.wp-embed-comments a{line-height:25px}.wp-embed-comments+.wp-embed-share{margin-left:10px}.wp-embed-share-dialog{position:absolute;top:0;left:0;right:0;bottom:0;background-color:#222;background-color:rgba(10,10,10,.9);color:#fff;opacity:1;-webkit-transition:opacity .25s ease-in-out;transition:opacity .25s ease-in-out}.wp-embed-share-dialog.hidden{opacity:0;visibility:hidden}.wp-embed-share-dialog-close,.wp-embed-share-dialog-open{margin:-8px 0 0;padding:0;background:0 0;border:none;cursor:pointer;outline:0}.wp-embed-share-dialog-close .dashicons,.wp-embed-share-dialog-open .dashicons{padding:4px}.wp-embed-share-dialog-open .dashicons{top:8px}.wp-embed-share-dialog-close:focus .dashicons,.wp-embed-share-dialog-open:focus .dashicons{-webkit-box-shadow:0 0 0 1px #5b9dd9,0 0 2px 1px rgba(30,140,190,.8);box-shadow:0 0 0 1px #5b9dd9,0 0 2px 1px rgba(30,140,190,.8);-webkit-border-radius:100%;border-radius:100%}.wp-embed-share-dialog-close{position:absolute;top:20px;right:20px;font-size:22px}.wp-embed-share-dialog-close:hover{text-decoration:none}.wp-embed-share-dialog-close .dashicons{height:24px;width:24px;-webkit-background-size:24px 24px;background-size:24px}.wp-embed-share-dialog-content{height:100%;-webkit-transform-style:preserve-3d;transform-style:preserve-3d;overflow:hidden}.wp-embed-share-dialog-text{margin-top:25px;padding:20px}.wp-embed-share-tabs{margin:0 0 20px;padding:0;list-style:none}.wp-embed-share-tab-button button{margin:0;padding:0;border:none;background:0 0;font-size:16px;line-height:1.3;color:#aaa;cursor:pointer;-webkit-transition:color .1s ease-in;transition:color .1s ease-in}.wp-embed-share-tab-button [aria-selected=true],.wp-embed-share-tab-button button:hover{color:#fff}.wp-embed-share-tab-button+.wp-embed-share-tab-button{margin:0 0 0 10px;padding:0 0 0 11px;border-left:1px solid #aaa}.wp-embed-share-tab[aria-hidden=true]{display:none}p.wp-embed-share-description{margin:0;font-size:14px;line-height:1;font-style:italic;color:#aaa}.wp-embed-share-input{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;width:100%;border:none;height:28px;margin:0 0 10px;padding:0 5px;font-size:14px;font-weight:400;line-height:1.5;resize:none;cursor:text}textarea.wp-embed-share-input{height:72px}html[dir=rtl] .wp-embed-featured-image.square{float:right;margin-right:0;margin-left:20px}html[dir=rtl] .wp-embed-site-title a{padding-left:0;padding-right:35px}html[dir=rtl] .wp-embed-site-icon{margin-right:0;margin-left:10px;left:auto;right:0}html[dir=rtl] .wp-embed-meta{text-align:left}html[dir=rtl] .wp-embed-share{margin-left:0;margin-right:10px}html[dir=rtl] .wp-embed-share-dialog-close{right:auto;left:20px}html[dir=rtl] .wp-embed-share-tab-button+.wp-embed-share-tab-button{margin:0 10px 0 0;padding:0 11px 0 0;border-left:none;border-right:1px solid #aaa}
876                         <?php
877                 }
878         ?>
879         </style>
880         <?php
881 }
882
883 /**
884  * Prints the JavaScript in the embed iframe header.
885  *
886  * @since 4.4.0
887  */
888 function print_embed_scripts() {
889         ?>
890         <script type="text/javascript">
891         <?php
892                 if ( SCRIPT_DEBUG ) {
893                         readfile( ABSPATH . WPINC . "/js/wp-embed-template.js" );
894                 } else {
895                         /*
896                          * If you're looking at a src version of this file, you'll see an "include"
897                          * statement below. This is used by the `grunt build` process to directly
898                          * include a minified version of wp-embed-template.js, instead of using the
899                          * readfile() method from above.
900                          *
901                          * If you're looking at a build version of this file, you'll see a string of
902                          * minified JavaScript. If you need to debug it, please turn on SCRIPT_DEBUG
903                          * and edit wp-embed-template.js directly.
904                          */
905                         ?>
906                         !function(a,b){"use strict";function c(b,c){a.parent.postMessage({message:b,value:c,secret:g},"*")}function d(){function d(){l.className=l.className.replace("hidden",""),b.querySelector('.wp-embed-share-tab-button [aria-selected="true"]').focus()}function e(){l.className+=" hidden",b.querySelector(".wp-embed-share-dialog-open").focus()}function f(a){var c=b.querySelector('.wp-embed-share-tab-button [aria-selected="true"]');c.setAttribute("aria-selected","false"),b.querySelector("#"+c.getAttribute("aria-controls")).setAttribute("aria-hidden","true"),a.target.setAttribute("aria-selected","true"),b.querySelector("#"+a.target.getAttribute("aria-controls")).setAttribute("aria-hidden","false")}function g(a){var c,d,e=a.target,f=e.parentElement.previousElementSibling,g=e.parentElement.nextElementSibling;if(37===a.keyCode)c=f;else{if(39!==a.keyCode)return!1;c=g}"rtl"===b.documentElement.getAttribute("dir")&&(c=c===f?g:f),c&&(d=c.firstElementChild,e.setAttribute("tabindex","-1"),e.setAttribute("aria-selected",!1),b.querySelector("#"+e.getAttribute("aria-controls")).setAttribute("aria-hidden","true"),d.setAttribute("tabindex","0"),d.setAttribute("aria-selected","true"),d.focus(),b.querySelector("#"+d.getAttribute("aria-controls")).setAttribute("aria-hidden","false"))}function h(a){var c=b.querySelector('.wp-embed-share-tab-button [aria-selected="true"]');n!==a.target||a.shiftKey?c===a.target&&a.shiftKey&&(n.focus(),a.preventDefault()):(c.focus(),a.preventDefault())}function i(a){var b,d=a.target;b=d.hasAttribute("href")?d.getAttribute("href"):d.parentElement.getAttribute("href"),b&&(c("link",b),a.preventDefault())}if(!k){k=!0;var j,l=b.querySelector(".wp-embed-share-dialog"),m=b.querySelector(".wp-embed-share-dialog-open"),n=b.querySelector(".wp-embed-share-dialog-close"),o=b.querySelectorAll(".wp-embed-share-input"),p=b.querySelectorAll(".wp-embed-share-tab-button button"),q=b.querySelector(".wp-embed-featured-image img");if(o)for(j=0;j<o.length;j++)o[j].addEventListener("click",function(a){a.target.select()});if(m&&m.addEventListener("click",function(){d()}),n&&n.addEventListener("click",function(){e()}),p)for(j=0;j<p.length;j++)p[j].addEventListener("click",f),p[j].addEventListener("keydown",g);b.addEventListener("keydown",function(a){27===a.keyCode&&-1===l.className.indexOf("hidden")?e():9===a.keyCode&&h(a)},!1),a.self!==a.top&&(c("height",Math.ceil(b.body.getBoundingClientRect().height)),q&&q.addEventListener("load",function(){c("height",Math.ceil(b.body.getBoundingClientRect().height))}),b.addEventListener("click",i))}}function e(){a.self!==a.top&&(clearTimeout(i),i=setTimeout(function(){c("height",Math.ceil(b.body.getBoundingClientRect().height))},100))}function f(){a.self===a.top||g||(g=a.location.hash.replace(/.*secret=([\d\w]{10}).*/,"$1"),clearTimeout(h),h=setTimeout(function(){f()},100))}var g,h,i,j=b.querySelector&&a.addEventListener,k=!1;j&&(f(),b.documentElement.className=b.documentElement.className.replace(/\bno-js\b/,"")+" js",b.addEventListener("DOMContentLoaded",d,!1),a.addEventListener("load",d,!1),a.addEventListener("resize",e,!1))}(window,document);
907                         <?php
908                 }
909         ?>
910         </script>
911         <?php
912 }
913
914 /**
915  * Prepare the oembed HTML to be displayed in an RSS feed.
916  *
917  * @since 4.4.0
918  * @access private
919  *
920  * @param string $content The content to filter.
921  * @return string The filtered content.
922  */
923 function _oembed_filter_feed_content( $content ) {
924         return str_replace( '<iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted" style="position: absolute; clip: rect(1px, 1px, 1px, 1px);"', '<iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted"', $content );
925 }
926
927 /**
928  * Prints the necessary markup for the embed comments button.
929  *
930  * @since 4.4.0
931  */
932 function print_embed_comments_button() {
933         if ( is_404() || ! ( get_comments_number() || comments_open() ) ) {
934                 return;
935         }
936         ?>
937         <div class="wp-embed-comments">
938                 <a href="<?php comments_link(); ?>" target="_top">
939                         <span class="dashicons dashicons-admin-comments"></span>
940                         <?php
941                         printf(
942                                 _n(
943                                         '%s <span class="screen-reader-text">Comment</span>',
944                                         '%s <span class="screen-reader-text">Comments</span>',
945                                         get_comments_number()
946                                 ),
947                                 number_format_i18n( get_comments_number() )
948                         );
949                         ?>
950                 </a>
951         </div>
952         <?php
953 }
954
955 /**
956  * Prints the necessary markup for the embed sharing button.
957  *
958  * @since 4.4.0
959  */
960 function print_embed_sharing_button() {
961         if ( is_404() ) {
962                 return;
963         }
964         ?>
965         <div class="wp-embed-share">
966                 <button type="button" class="wp-embed-share-dialog-open" aria-label="<?php esc_attr_e( 'Open sharing dialog' ); ?>">
967                         <span class="dashicons dashicons-share"></span>
968                 </button>
969         </div>
970         <?php
971 }
972
973 /**
974  * Prints the necessary markup for the embed sharing dialog.
975  *
976  * @since 4.4.0
977  */
978 function print_embed_sharing_dialog() {
979         if ( is_404() ) {
980                 return;
981         }
982         ?>
983         <div class="wp-embed-share-dialog hidden" role="dialog" aria-label="<?php esc_attr_e( 'Sharing options' ); ?>">
984                 <div class="wp-embed-share-dialog-content">
985                         <div class="wp-embed-share-dialog-text">
986                                 <ul class="wp-embed-share-tabs" role="tablist">
987                                         <li class="wp-embed-share-tab-button wp-embed-share-tab-button-wordpress" role="presentation">
988                                                 <button type="button" role="tab" aria-controls="wp-embed-share-tab-wordpress" aria-selected="true" tabindex="0"><?php esc_html_e( 'WordPress Embed' ); ?></button>
989                                         </li>
990                                         <li class="wp-embed-share-tab-button wp-embed-share-tab-button-html" role="presentation">
991                                                 <button type="button" role="tab" aria-controls="wp-embed-share-tab-html" aria-selected="false" tabindex="-1"><?php esc_html_e( 'HTML Embed' ); ?></button>
992                                         </li>
993                                 </ul>
994                                 <div id="wp-embed-share-tab-wordpress" class="wp-embed-share-tab" role="tabpanel" aria-hidden="false">
995                                         <input type="text" value="<?php the_permalink(); ?>" class="wp-embed-share-input" aria-describedby="wp-embed-share-description-wordpress" tabindex="0" readonly/>
996
997                                         <p class="wp-embed-share-description" id="wp-embed-share-description-wordpress">
998                                                 <?php _e( 'Copy and paste this URL into your WordPress site to embed' ); ?>
999                                         </p>
1000                                 </div>
1001                                 <div id="wp-embed-share-tab-html" class="wp-embed-share-tab" role="tabpanel" aria-hidden="true">
1002                                         <textarea class="wp-embed-share-input" aria-describedby="wp-embed-share-description-html" tabindex="0" readonly><?php echo esc_textarea( get_post_embed_html( 600, 400 ) ); ?></textarea>
1003
1004                                         <p class="wp-embed-share-description" id="wp-embed-share-description-html">
1005                                                 <?php _e( 'Copy and paste this code into your site to embed' ); ?>
1006                                         </p>
1007                                 </div>
1008                         </div>
1009
1010                         <button type="button" class="wp-embed-share-dialog-close" aria-label="<?php esc_attr_e( 'Close sharing dialog' ); ?>">
1011                                 <span class="dashicons dashicons-no"></span>
1012                         </button>
1013                 </div>
1014         </div>
1015         <?php
1016 }
1017
1018 /**
1019  * Prints the necessary markup for the site title in an embed template.
1020  *
1021  * @since 4.5.0
1022  */
1023 function the_embed_site_title() {
1024         $site_title = sprintf(
1025                 '<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>',
1026                 esc_url( home_url() ),
1027                 esc_url( get_site_icon_url( 32, admin_url( 'images/w-logo-blue.png' ) ) ),
1028                 esc_url( get_site_icon_url( 64, admin_url( 'images/w-logo-blue.png' ) ) ),
1029                 esc_html( get_bloginfo( 'name' ) )
1030         );
1031
1032         $site_title = '<div class="wp-embed-site-title">' . $site_title . '</div>';
1033
1034         /**
1035          * Filters the site title HTML in the embed footer.
1036          *
1037          * @since 4.4.0
1038          *
1039          * @param string $site_title The site title HTML.
1040          */
1041         echo apply_filters( 'embed_site_title_html', $site_title );
1042 }
1043
1044 /**
1045  * Filters the oEmbed result before any HTTP requests are made.
1046  *
1047  * If the URL belongs to the current site, the result is fetched directly instead of
1048  * going through the oEmbed discovery process.
1049  *
1050  * @since 4.5.3
1051  *
1052  * @param null|string $result The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. Default null.
1053  * @param string      $url    The URL that should be inspected for discovery `<link>` tags.
1054  * @param array       $args   oEmbed remote get arguments.
1055  * @return null|string The UNSANITIZED (and potentially unsafe) HTML that should be used to embed.
1056  *                     Null if the URL does not belong to the current site.
1057  */
1058 function wp_filter_pre_oembed_result( $result, $url, $args ) {
1059         $post_id = url_to_postid( $url );
1060
1061         /** This filter is documented in wp-includes/class-wp-oembed-controller.php */
1062         $post_id = apply_filters( 'oembed_request_post_id', $post_id, $url );
1063
1064         if ( ! $post_id ) {
1065                 return $result;
1066         }
1067
1068         $width = isset( $args['width'] ) ? $args['width'] : 0;
1069
1070         $data = get_oembed_response_data( $post_id, $width );
1071         $data = _wp_oembed_get_object()->data2html( (object) $data, $url );
1072
1073         if ( ! $data ) {
1074                 return $result;
1075         }
1076
1077         return $data;
1078 }