WordPress 4.7
[autoinstalls/wordpress.git] / wp-includes / embed.php
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         $oembed = _wp_oembed_get_object();
98         return $oembed->get_html( $url, $args );
99 }
100
101 /**
102  * Returns the initialized WP_oEmbed object.
103  *
104  * @since 2.9.0
105  * @access private
106  *
107  * @staticvar WP_oEmbed $wp_oembed
108  *
109  * @return WP_oEmbed object.
110  */
111 function _wp_oembed_get_object() {
112         static $wp_oembed = null;
113
114         if ( is_null( $wp_oembed ) ) {
115                 $wp_oembed = new WP_oEmbed();
116         }
117         return $wp_oembed;
118 }
119
120 /**
121  * Adds a URL format and oEmbed provider URL pair.
122  *
123  * @since 2.9.0
124  *
125  * @see WP_oEmbed
126  *
127  * @param string  $format   The format of URL that this provider can handle. You can use asterisks
128  *                          as wildcards.
129  * @param string  $provider The URL to the oEmbed provider.
130  * @param boolean $regex    Optional. Whether the `$format` parameter is in a RegEx format. Default false.
131  */
132 function wp_oembed_add_provider( $format, $provider, $regex = false ) {
133         if ( did_action( 'plugins_loaded' ) ) {
134                 $oembed = _wp_oembed_get_object();
135                 $oembed->providers[$format] = array( $provider, $regex );
136         } else {
137                 WP_oEmbed::_add_provider_early( $format, $provider, $regex );
138         }
139 }
140
141 /**
142  * Removes an oEmbed provider.
143  *
144  * @since 3.5.0
145  *
146  * @see WP_oEmbed
147  *
148  * @param string $format The URL format for the oEmbed provider to remove.
149  * @return bool Was the provider removed successfully?
150  */
151 function wp_oembed_remove_provider( $format ) {
152         if ( did_action( 'plugins_loaded' ) ) {
153                 $oembed = _wp_oembed_get_object();
154
155                 if ( isset( $oembed->providers[ $format ] ) ) {
156                         unset( $oembed->providers[ $format ] );
157                         return true;
158                 }
159         } else {
160                 WP_oEmbed::_remove_provider_early( $format );
161         }
162
163         return false;
164 }
165
166 /**
167  * Determines if default embed handlers should be loaded.
168  *
169  * Checks to make sure that the embeds library hasn't already been loaded. If
170  * it hasn't, then it will load the embeds library.
171  *
172  * @since 2.9.0
173  *
174  * @see wp_embed_register_handler()
175  */
176 function wp_maybe_load_embeds() {
177         /**
178          * Filters whether to load the default embed handlers.
179          *
180          * Returning a falsey value will prevent loading the default embed handlers.
181          *
182          * @since 2.9.0
183          *
184          * @param bool $maybe_load_embeds Whether to load the embeds library. Default true.
185          */
186         if ( ! apply_filters( 'load_default_embeds', true ) ) {
187                 return;
188         }
189
190         wp_embed_register_handler( 'youtube_embed_url', '#https?://(www.)?youtube\.com/(?:v|embed)/([^/]+)#i', 'wp_embed_handler_youtube' );
191
192         /**
193          * Filters the audio embed handler callback.
194          *
195          * @since 3.6.0
196          *
197          * @param callable $handler Audio embed handler callback function.
198          */
199         wp_embed_register_handler( 'audio', '#^https?://.+?\.(' . join( '|', wp_get_audio_extensions() ) . ')$#i', apply_filters( 'wp_audio_embed_handler', 'wp_embed_handler_audio' ), 9999 );
200
201         /**
202          * Filters the video embed handler callback.
203          *
204          * @since 3.6.0
205          *
206          * @param callable $handler Video embed handler callback function.
207          */
208         wp_embed_register_handler( 'video', '#^https?://.+?\.(' . join( '|', wp_get_video_extensions() ) . ')$#i', apply_filters( 'wp_video_embed_handler', 'wp_embed_handler_video' ), 9999 );
209 }
210
211 /**
212  * YouTube iframe embed handler callback.
213  *
214  * Catches YouTube iframe embed URLs that are not parsable by oEmbed but can be translated into a URL that is.
215  *
216  * @since 4.0.0
217  *
218  * @global WP_Embed $wp_embed
219  *
220  * @param array  $matches The RegEx matches from the provided regex when calling
221  *                        wp_embed_register_handler().
222  * @param array  $attr    Embed attributes.
223  * @param string $url     The original URL that was matched by the regex.
224  * @param array  $rawattr The original unmodified attributes.
225  * @return string The embed HTML.
226  */
227 function wp_embed_handler_youtube( $matches, $attr, $url, $rawattr ) {
228         global $wp_embed;
229         $embed = $wp_embed->autoembed( "https://youtube.com/watch?v={$matches[2]}" );
230
231         /**
232          * Filters the YoutTube embed output.
233          *
234          * @since 4.0.0
235          *
236          * @see wp_embed_handler_youtube()
237          *
238          * @param string $embed   YouTube embed output.
239          * @param array  $attr    An array of embed attributes.
240          * @param string $url     The original URL that was matched by the regex.
241          * @param array  $rawattr The original unmodified attributes.
242          */
243         return apply_filters( 'wp_embed_handler_youtube', $embed, $attr, $url, $rawattr );
244 }
245
246 /**
247  * Audio embed handler callback.
248  *
249  * @since 3.6.0
250  *
251  * @param array  $matches The RegEx matches from the provided regex when calling wp_embed_register_handler().
252  * @param array  $attr Embed attributes.
253  * @param string $url The original URL that was matched by the regex.
254  * @param array  $rawattr The original unmodified attributes.
255  * @return string The embed HTML.
256  */
257 function wp_embed_handler_audio( $matches, $attr, $url, $rawattr ) {
258         $audio = sprintf( '[audio src="%s" /]', esc_url( $url ) );
259
260         /**
261          * Filters the audio embed output.
262          *
263          * @since 3.6.0
264          *
265          * @param string $audio   Audio embed output.
266          * @param array  $attr    An array of embed attributes.
267          * @param string $url     The original URL that was matched by the regex.
268          * @param array  $rawattr The original unmodified attributes.
269          */
270         return apply_filters( 'wp_embed_handler_audio', $audio, $attr, $url, $rawattr );
271 }
272
273 /**
274  * Video embed handler callback.
275  *
276  * @since 3.6.0
277  *
278  * @param array  $matches The RegEx matches from the provided regex when calling wp_embed_register_handler().
279  * @param array  $attr    Embed attributes.
280  * @param string $url     The original URL that was matched by the regex.
281  * @param array  $rawattr The original unmodified attributes.
282  * @return string The embed HTML.
283  */
284 function wp_embed_handler_video( $matches, $attr, $url, $rawattr ) {
285         $dimensions = '';
286         if ( ! empty( $rawattr['width'] ) && ! empty( $rawattr['height'] ) ) {
287                 $dimensions .= sprintf( 'width="%d" ', (int) $rawattr['width'] );
288                 $dimensions .= sprintf( 'height="%d" ', (int) $rawattr['height'] );
289         }
290         $video = sprintf( '[video %s src="%s" /]', $dimensions, esc_url( $url ) );
291
292         /**
293          * Filters the video embed output.
294          *
295          * @since 3.6.0
296          *
297          * @param string $video   Video embed output.
298          * @param array  $attr    An array of embed attributes.
299          * @param string $url     The original URL that was matched by the regex.
300          * @param array  $rawattr The original unmodified attributes.
301          */
302         return apply_filters( 'wp_embed_handler_video', $video, $attr, $url, $rawattr );
303 }
304
305 /**
306  * Registers the oEmbed REST API route.
307  *
308  * @since 4.4.0
309  */
310 function wp_oembed_register_route() {
311         $controller = new WP_oEmbed_Controller();
312         $controller->register_routes();
313 }
314
315 /**
316  * Adds oEmbed discovery links in the website <head>.
317  *
318  * @since 4.4.0
319  */
320 function wp_oembed_add_discovery_links() {
321         $output = '';
322
323         if ( is_singular() ) {
324                 $output .= '<link rel="alternate" type="application/json+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink() ) ) . '" />' . "\n";
325
326                 if ( class_exists( 'SimpleXMLElement' ) ) {
327                         $output .= '<link rel="alternate" type="text/xml+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink(), 'xml' ) ) . '" />' . "\n";
328                 }
329         }
330
331         /**
332          * Filters the oEmbed discovery links HTML.
333          *
334          * @since 4.4.0
335          *
336          * @param string $output HTML of the discovery links.
337          */
338         echo apply_filters( 'oembed_discovery_links', $output );
339 }
340
341 /**
342  * Adds the necessary JavaScript to communicate with the embedded iframes.
343  *
344  * @since 4.4.0
345  */
346 function wp_oembed_add_host_js() {
347         wp_enqueue_script( 'wp-embed' );
348 }
349
350 /**
351  * Retrieves the URL to embed a specific post in an iframe.
352  *
353  * @since 4.4.0
354  *
355  * @param int|WP_Post $post Optional. Post ID or object. Defaults to the current post.
356  * @return string|false The post embed URL on success, false if the post doesn't exist.
357  */
358 function get_post_embed_url( $post = null ) {
359         $post = get_post( $post );
360
361         if ( ! $post ) {
362                 return false;
363         }
364
365         $embed_url     = trailingslashit( get_permalink( $post ) ) . user_trailingslashit( 'embed' );
366         $path_conflict = get_page_by_path( str_replace( home_url(), '', $embed_url ), OBJECT, get_post_types( array( 'public' => true ) ) );
367
368         if ( ! get_option( 'permalink_structure' ) || $path_conflict ) {
369                 $embed_url = add_query_arg( array( 'embed' => 'true' ), get_permalink( $post ) );
370         }
371
372         /**
373          * Filters the URL to embed a specific post.
374          *
375          * @since 4.4.0
376          *
377          * @param string  $embed_url The post embed URL.
378          * @param WP_Post $post      The corresponding post object.
379          */
380         return esc_url_raw( apply_filters( 'post_embed_url', $embed_url, $post ) );
381 }
382
383 /**
384  * Retrieves the oEmbed endpoint URL for a given permalink.
385  *
386  * Pass an empty string as the first argument to get the endpoint base URL.
387  *
388  * @since 4.4.0
389  *
390  * @param string $permalink Optional. The permalink used for the `url` query arg. Default empty.
391  * @param string $format    Optional. The requested response format. Default 'json'.
392  * @return string The oEmbed endpoint URL.
393  */
394 function get_oembed_endpoint_url( $permalink = '', $format = 'json' ) {
395         $url = rest_url( 'oembed/1.0/embed' );
396
397         if ( '' !== $permalink ) {
398                 $url = add_query_arg( array(
399                         'url'    => urlencode( $permalink ),
400                         'format' => ( 'json' !== $format ) ? $format : false,
401                 ), $url );
402         }
403
404         /**
405          * Filters the oEmbed endpoint URL.
406          *
407          * @since 4.4.0
408          *
409          * @param string $url       The URL to the oEmbed endpoint.
410          * @param string $permalink The permalink used for the `url` query arg.
411          * @param string $format    The requested response format.
412          */
413         return apply_filters( 'oembed_endpoint_url', $url, $permalink, $format );
414 }
415
416 /**
417  * Retrieves the embed code for a specific post.
418  *
419  * @since 4.4.0
420  *
421  * @param int         $width  The width for the response.
422  * @param int         $height The height for the response.
423  * @param int|WP_Post $post   Optional. Post ID or object. Default is global `$post`.
424  * @return string|false Embed code on success, false if post doesn't exist.
425  */
426 function get_post_embed_html( $width, $height, $post = null ) {
427         $post = get_post( $post );
428
429         if ( ! $post ) {
430                 return false;
431         }
432
433         $embed_url = get_post_embed_url( $post );
434
435         $output = '<blockquote class="wp-embedded-content"><a href="' . esc_url( get_permalink( $post ) ) . '">' . get_the_title( $post ) . "</a></blockquote>\n";
436
437         $output .= "<script type='text/javascript'>\n";
438         $output .= "<!--//--><![CDATA[//><!--\n";
439         if ( SCRIPT_DEBUG ) {
440                 $output .= file_get_contents( ABSPATH . WPINC . '/js/wp-embed.js' );
441         } else {
442                 /*
443                  * If you're looking at a src version of this file, you'll see an "include"
444                  * statement below. This is used by the `grunt build` process to directly
445                  * include a minified version of wp-embed.js, instead of using the
446                  * file_get_contents() method from above.
447                  *
448                  * If you're looking at a build version of this file, you'll see a string of
449                  * minified JavaScript. If you need to debug it, please turn on SCRIPT_DEBUG
450                  * and edit wp-embed.js directly.
451                  */
452                 $output .=<<<JS
453                 !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"))f=Math.random().toString(36).substr(2,10),d.src+="#?secret="+f,d.setAttribute("data-secret",f);if(g||h)a=d.cloneNode(!0),a.removeAttribute("security"),d.parentNode.replaceChild(a,d)}}}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);
454 JS;
455         }
456         $output .= "\n//--><!]]>";
457         $output .= "\n</script>";
458
459         $output .= sprintf(
460                 '<iframe sandbox="allow-scripts" security="restricted" src="%1$s" width="%2$d" height="%3$d" title="%4$s" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe>',
461                 esc_url( $embed_url ),
462                 absint( $width ),
463                 absint( $height ),
464                 esc_attr(
465                         sprintf(
466                                 /* translators: 1: post title, 2: site name */
467                                 __( '&#8220;%1$s&#8221; &#8212; %2$s' ),
468                                 get_the_title( $post ),
469                                 get_bloginfo( 'name' )
470                         )
471                 )
472         );
473
474         /**
475          * Filters the embed HTML output for a given post.
476          *
477          * @since 4.4.0
478          *
479          * @param string  $output The default HTML.
480          * @param WP_Post $post   Current post object.
481          * @param int     $width  Width of the response.
482          * @param int     $height Height of the response.
483          */
484         return apply_filters( 'embed_html', $output, $post, $width, $height );
485 }
486
487 /**
488  * Retrieves the oEmbed response data for a given post.
489  *
490  * @since 4.4.0
491  *
492  * @param WP_Post|int $post  Post object or ID.
493  * @param int         $width The requested width.
494  * @return array|false Response data on success, false if post doesn't exist.
495  */
496 function get_oembed_response_data( $post, $width ) {
497         $post  = get_post( $post );
498         $width = absint( $width );
499
500         if ( ! $post ) {
501                 return false;
502         }
503
504         if ( 'publish' !== get_post_status( $post ) ) {
505                 return false;
506         }
507
508         /**
509          * Filters the allowed minimum and maximum widths for the oEmbed response.
510          *
511          * @since 4.4.0
512          *
513          * @param array $min_max_width {
514          *     Minimum and maximum widths for the oEmbed response.
515          *
516          *     @type int $min Minimum width. Default 200.
517          *     @type int $max Maximum width. Default 600.
518          * }
519          */
520         $min_max_width = apply_filters( 'oembed_min_max_width', array(
521                 'min' => 200,
522                 'max' => 600
523         ) );
524
525         $width  = min( max( $min_max_width['min'], $width ), $min_max_width['max'] );
526         $height = max( ceil( $width / 16 * 9 ), 200 );
527
528         $data = array(
529                 'version'       => '1.0',
530                 'provider_name' => get_bloginfo( 'name' ),
531                 'provider_url'  => get_home_url(),
532                 'author_name'   => get_bloginfo( 'name' ),
533                 'author_url'    => get_home_url(),
534                 'title'         => $post->post_title,
535                 'type'          => 'link',
536         );
537
538         $author = get_userdata( $post->post_author );
539
540         if ( $author ) {
541                 $data['author_name'] = $author->display_name;
542                 $data['author_url']  = get_author_posts_url( $author->ID );
543         }
544
545         /**
546          * Filters the oEmbed response data.
547          *
548          * @since 4.4.0
549          *
550          * @param array   $data   The response data.
551          * @param WP_Post $post   The post object.
552          * @param int     $width  The requested width.
553          * @param int     $height The calculated height.
554          */
555         return apply_filters( 'oembed_response_data', $data, $post, $width, $height );
556 }
557
558 /**
559  * Filters the oEmbed response data to return an iframe embed code.
560  *
561  * @since 4.4.0
562  *
563  * @param array   $data   The response data.
564  * @param WP_Post $post   The post object.
565  * @param int     $width  The requested width.
566  * @param int     $height The calculated height.
567  * @return array The modified response data.
568  */
569 function get_oembed_response_data_rich( $data, $post, $width, $height ) {
570         $data['width']  = absint( $width );
571         $data['height'] = absint( $height );
572         $data['type']   = 'rich';
573         $data['html']   = get_post_embed_html( $width, $height, $post );
574
575         // Add post thumbnail to response if available.
576         $thumbnail_id = false;
577
578         if ( has_post_thumbnail( $post->ID ) ) {
579                 $thumbnail_id = get_post_thumbnail_id( $post->ID );
580         }
581
582         if ( 'attachment' === get_post_type( $post ) ) {
583                 if ( wp_attachment_is_image( $post ) ) {
584                         $thumbnail_id = $post->ID;
585                 } else if ( wp_attachment_is( 'video', $post ) ) {
586                         $thumbnail_id = get_post_thumbnail_id( $post );
587                         $data['type'] = 'video';
588                 }
589         }
590
591         if ( $thumbnail_id ) {
592                 list( $thumbnail_url, $thumbnail_width, $thumbnail_height ) = wp_get_attachment_image_src( $thumbnail_id, array( $width, 99999 ) );
593                 $data['thumbnail_url']    = $thumbnail_url;
594                 $data['thumbnail_width']  = $thumbnail_width;
595                 $data['thumbnail_height'] = $thumbnail_height;
596         }
597
598         return $data;
599 }
600
601 /**
602  * Ensures that the specified format is either 'json' or 'xml'.
603  *
604  * @since 4.4.0
605  *
606  * @param string $format The oEmbed response format. Accepts 'json' or 'xml'.
607  * @return string The format, either 'xml' or 'json'. Default 'json'.
608  */
609 function wp_oembed_ensure_format( $format ) {
610         if ( ! in_array( $format, array( 'json', 'xml' ), true ) ) {
611                 return 'json';
612         }
613
614         return $format;
615 }
616
617 /**
618  * Hooks into the REST API output to print XML instead of JSON.
619  *
620  * This is only done for the oEmbed API endpoint,
621  * which supports both formats.
622  *
623  * @access private
624  * @since 4.4.0
625  *
626  * @param bool                      $served  Whether the request has already been served.
627  * @param WP_HTTP_ResponseInterface $result  Result to send to the client. Usually a WP_REST_Response.
628  * @param WP_REST_Request           $request Request used to generate the response.
629  * @param WP_REST_Server            $server  Server instance.
630  * @return true
631  */
632 function _oembed_rest_pre_serve_request( $served, $result, $request, $server ) {
633         $params = $request->get_params();
634
635         if ( '/oembed/1.0/embed' !== $request->get_route() || 'GET' !== $request->get_method() ) {
636                 return $served;
637         }
638
639         if ( ! isset( $params['format'] ) || 'xml' !== $params['format'] ) {
640                 return $served;
641         }
642
643         // Embed links inside the request.
644         $data = $server->response_to_data( $result, false );
645
646         if ( ! class_exists( 'SimpleXMLElement' ) ) {
647                 status_header( 501 );
648                 die( get_status_header_desc( 501 ) );
649         }
650
651         $result = _oembed_create_xml( $data );
652
653         // Bail if there's no XML.
654         if ( ! $result ) {
655                 status_header( 501 );
656                 return get_status_header_desc( 501 );
657         }
658
659         if ( ! headers_sent() ) {
660                 $server->send_header( 'Content-Type', 'text/xml; charset=' . get_option( 'blog_charset' ) );
661         }
662
663         echo $result;
664
665         return true;
666 }
667
668 /**
669  * Creates an XML string from a given array.
670  *
671  * @since 4.4.0
672  * @access private
673  *
674  * @param array            $data The original oEmbed response data.
675  * @param SimpleXMLElement $node Optional. XML node to append the result to recursively.
676  * @return string|false XML string on success, false on error.
677  */
678 function _oembed_create_xml( $data, $node = null ) {
679         if ( ! is_array( $data ) || empty( $data ) ) {
680                 return false;
681         }
682
683         if ( null === $node ) {
684                 $node = new SimpleXMLElement( '<oembed></oembed>' );
685         }
686
687         foreach ( $data as $key => $value ) {
688                 if ( is_numeric( $key ) ) {
689                         $key = 'oembed';
690                 }
691
692                 if ( is_array( $value ) ) {
693                         $item = $node->addChild( $key );
694                         _oembed_create_xml( $value, $item );
695                 } else {
696                         $node->addChild( $key, esc_html( $value ) );
697                 }
698         }
699
700         return $node->asXML();
701 }
702
703 /**
704  * Filters the given oEmbed HTML.
705  *
706  * If the `$url` isn't on the trusted providers list,
707  * we need to filter the HTML heavily for security.
708  *
709  * Only filters 'rich' and 'html' response types.
710  *
711  * @since 4.4.0
712  *
713  * @param string $result The oEmbed HTML result.
714  * @param object $data   A data object result from an oEmbed provider.
715  * @param string $url    The URL of the content to be embedded.
716  * @return string The filtered and sanitized oEmbed result.
717  */
718 function wp_filter_oembed_result( $result, $data, $url ) {
719         if ( false === $result || ! in_array( $data->type, array( 'rich', 'video' ) ) ) {
720                 return $result;
721         }
722
723         $wp_oembed = _wp_oembed_get_object();
724
725         // Don't modify the HTML for trusted providers.
726         if ( false !== $wp_oembed->get_provider( $url, array( 'discover' => false ) ) ) {
727                 return $result;
728         }
729
730         $allowed_html = array(
731                 'a'          => array(
732                         'href'         => true,
733                 ),
734                 'blockquote' => array(),
735                 'iframe'     => array(
736                         'src'          => true,
737                         'width'        => true,
738                         'height'       => true,
739                         'frameborder'  => true,
740                         'marginwidth'  => true,
741                         'marginheight' => true,
742                         'scrolling'    => true,
743                         'title'        => true,
744                 ),
745         );
746
747         $html = wp_kses( $result, $allowed_html );
748
749         preg_match( '|(<blockquote>.*?</blockquote>)?.*(<iframe.*?></iframe>)|ms', $html, $content );
750         // We require at least the iframe to exist.
751         if ( empty( $content[2] ) ) {
752                 return false;
753         }
754         $html = $content[1] . $content[2];
755
756         if ( ! empty( $content[1] ) ) {
757                 // We have a blockquote to fall back on. Hide the iframe by default.
758                 $html = str_replace( '<iframe', '<iframe style="position: absolute; clip: rect(1px, 1px, 1px, 1px);"', $html );
759                 $html = str_replace( '<blockquote', '<blockquote class="wp-embedded-content"', $html );
760         }
761
762         $html = str_replace( '<iframe', '<iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted"', $html );
763
764         preg_match( '/ src=[\'"]([^\'"]*)[\'"]/', $html, $results );
765
766         if ( ! empty( $results ) ) {
767                 $secret = wp_generate_password( 10, false );
768
769                 $url = esc_url( "{$results[1]}#?secret=$secret" );
770
771                 $html = str_replace( $results[0], " src=\"$url\" data-secret=\"$secret\"", $html );
772                 $html = str_replace( '<blockquote', "<blockquote data-secret=\"$secret\"", $html );
773         }
774
775         return $html;
776 }
777
778 /**
779  * Filters the string in the 'more' link displayed after a trimmed excerpt.
780  *
781  * Replaces '[...]' (appended to automatically generated excerpts) with an
782  * ellipsis and a "Continue reading" link in the embed template.
783  *
784  * @since 4.4.0
785  *
786  * @param string $more_string Default 'more' string.
787  * @return string 'Continue reading' link prepended with an ellipsis.
788  */
789 function wp_embed_excerpt_more( $more_string ) {
790         if ( ! is_embed() ) {
791                 return $more_string;
792         }
793
794         $link = sprintf( '<a href="%1$s" class="wp-embed-more" target="_top">%2$s</a>',
795                 esc_url( get_permalink() ),
796                 /* translators: %s: Name of current post */
797                 sprintf( __( 'Continue reading %s' ), '<span class="screen-reader-text">' . get_the_title() . '</span>' )
798         );
799         return ' &hellip; ' . $link;
800 }
801
802 /**
803  * Displays the post excerpt for the embed template.
804  *
805  * Intended to be used in 'The Loop'.
806  *
807  * @since 4.4.0
808  */
809 function the_excerpt_embed() {
810         $output = get_the_excerpt();
811
812         /**
813          * Filters the post excerpt for the embed template.
814          *
815          * @since 4.4.0
816          *
817          * @param string $output The current post excerpt.
818          */
819         echo apply_filters( 'the_excerpt_embed', $output );
820 }
821
822 /**
823  * Filters the post excerpt for the embed template.
824  *
825  * Shows players for video and audio attachments.
826  *
827  * @since 4.4.0
828  *
829  * @param string $content The current post excerpt.
830  * @return string The modified post excerpt.
831  */
832 function wp_embed_excerpt_attachment( $content ) {
833         if ( is_attachment() ) {
834                 return prepend_attachment( '' );
835         }
836
837         return $content;
838 }
839
840 /**
841  * Enqueue embed iframe default CSS and JS & fire do_action('enqueue_embed_scripts')
842  *
843  * Enqueue PNG fallback CSS for embed iframe for legacy versions of IE.
844  *
845  * Allows plugins to queue scripts for the embed iframe end using wp_enqueue_script().
846  * Runs first in oembed_head().
847  *
848  * @since 4.4.0
849  */
850 function enqueue_embed_scripts() {
851         wp_enqueue_style( 'wp-embed-template-ie' );
852
853         /**
854          * Fires when scripts and styles are enqueued for the embed iframe.
855          *
856          * @since 4.4.0
857          */
858         do_action( 'enqueue_embed_scripts' );
859 }
860
861 /**
862  * Prints the CSS in the embed iframe header.
863  *
864  * @since 4.4.0
865  */
866 function print_embed_styles() {
867         ?>
868         <style type="text/css">
869         <?php
870                 if ( SCRIPT_DEBUG ) {
871                         readfile( ABSPATH . WPINC . "/css/wp-embed-template.css" );
872                 } else {
873                         /*
874                          * If you're looking at a src version of this file, you'll see an "include"
875                          * statement below. This is used by the `grunt build` process to directly
876                          * include a minified version of wp-oembed-embed.css, instead of using the
877                          * readfile() method from above.
878                          *
879                          * If you're looking at a build version of this file, you'll see a string of
880                          * minified CSS. If you need to debug it, please turn on SCRIPT_DEBUG
881                          * and edit wp-embed-template.css directly.
882                          */
883                         ?>
884                         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}
885                         <?php
886                 }
887         ?>
888         </style>
889         <?php
890 }
891
892 /**
893  * Prints the JavaScript in the embed iframe header.
894  *
895  * @since 4.4.0
896  */
897 function print_embed_scripts() {
898         ?>
899         <script type="text/javascript">
900         <?php
901                 if ( SCRIPT_DEBUG ) {
902                         readfile( ABSPATH . WPINC . "/js/wp-embed-template.js" );
903                 } else {
904                         /*
905                          * If you're looking at a src version of this file, you'll see an "include"
906                          * statement below. This is used by the `grunt build` process to directly
907                          * include a minified version of wp-embed-template.js, instead of using the
908                          * readfile() method from above.
909                          *
910                          * If you're looking at a build version of this file, you'll see a string of
911                          * minified JavaScript. If you need to debug it, please turn on SCRIPT_DEBUG
912                          * and edit wp-embed-template.js directly.
913                          */
914                         ?>
915                         !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);
916                         <?php
917                 }
918         ?>
919         </script>
920         <?php
921 }
922
923 /**
924  * Prepare the oembed HTML to be displayed in an RSS feed.
925  *
926  * @since 4.4.0
927  * @access private
928  *
929  * @param string $content The content to filter.
930  * @return string The filtered content.
931  */
932 function _oembed_filter_feed_content( $content ) {
933         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 );
934 }
935
936 /**
937  * Prints the necessary markup for the embed comments button.
938  *
939  * @since 4.4.0
940  */
941 function print_embed_comments_button() {
942         if ( is_404() || ! ( get_comments_number() || comments_open() ) ) {
943                 return;
944         }
945         ?>
946         <div class="wp-embed-comments">
947                 <a href="<?php comments_link(); ?>" target="_top">
948                         <span class="dashicons dashicons-admin-comments"></span>
949                         <?php
950                         printf(
951                                 _n(
952                                         '%s <span class="screen-reader-text">Comment</span>',
953                                         '%s <span class="screen-reader-text">Comments</span>',
954                                         get_comments_number()
955                                 ),
956                                 number_format_i18n( get_comments_number() )
957                         );
958                         ?>
959                 </a>
960         </div>
961         <?php
962 }
963
964 /**
965  * Prints the necessary markup for the embed sharing button.
966  *
967  * @since 4.4.0
968  */
969 function print_embed_sharing_button() {
970         if ( is_404() ) {
971                 return;
972         }
973         ?>
974         <div class="wp-embed-share">
975                 <button type="button" class="wp-embed-share-dialog-open" aria-label="<?php esc_attr_e( 'Open sharing dialog' ); ?>">
976                         <span class="dashicons dashicons-share"></span>
977                 </button>
978         </div>
979         <?php
980 }
981
982 /**
983  * Prints the necessary markup for the embed sharing dialog.
984  *
985  * @since 4.4.0
986  */
987 function print_embed_sharing_dialog() {
988         if ( is_404() ) {
989                 return;
990         }
991         ?>
992         <div class="wp-embed-share-dialog hidden" role="dialog" aria-label="<?php esc_attr_e( 'Sharing options' ); ?>">
993                 <div class="wp-embed-share-dialog-content">
994                         <div class="wp-embed-share-dialog-text">
995                                 <ul class="wp-embed-share-tabs" role="tablist">
996                                         <li class="wp-embed-share-tab-button wp-embed-share-tab-button-wordpress" role="presentation">
997                                                 <button type="button" role="tab" aria-controls="wp-embed-share-tab-wordpress" aria-selected="true" tabindex="0"><?php esc_html_e( 'WordPress Embed' ); ?></button>
998                                         </li>
999                                         <li class="wp-embed-share-tab-button wp-embed-share-tab-button-html" role="presentation">
1000                                                 <button type="button" role="tab" aria-controls="wp-embed-share-tab-html" aria-selected="false" tabindex="-1"><?php esc_html_e( 'HTML Embed' ); ?></button>
1001                                         </li>
1002                                 </ul>
1003                                 <div id="wp-embed-share-tab-wordpress" class="wp-embed-share-tab" role="tabpanel" aria-hidden="false">
1004                                         <input type="text" value="<?php the_permalink(); ?>" class="wp-embed-share-input" aria-describedby="wp-embed-share-description-wordpress" tabindex="0" readonly/>
1005
1006                                         <p class="wp-embed-share-description" id="wp-embed-share-description-wordpress">
1007                                                 <?php _e( 'Copy and paste this URL into your WordPress site to embed' ); ?>
1008                                         </p>
1009                                 </div>
1010                                 <div id="wp-embed-share-tab-html" class="wp-embed-share-tab" role="tabpanel" aria-hidden="true">
1011                                         <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>
1012
1013                                         <p class="wp-embed-share-description" id="wp-embed-share-description-html">
1014                                                 <?php _e( 'Copy and paste this code into your site to embed' ); ?>
1015                                         </p>
1016                                 </div>
1017                         </div>
1018
1019                         <button type="button" class="wp-embed-share-dialog-close" aria-label="<?php esc_attr_e( 'Close sharing dialog' ); ?>">
1020                                 <span class="dashicons dashicons-no"></span>
1021                         </button>
1022                 </div>
1023         </div>
1024         <?php
1025 }
1026
1027 /**
1028  * Prints the necessary markup for the site title in an embed template.
1029  *
1030  * @since 4.5.0
1031  */
1032 function the_embed_site_title() {
1033         $site_title = sprintf(
1034                 '<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>',
1035                 esc_url( home_url() ),
1036                 esc_url( get_site_icon_url( 32, admin_url( 'images/w-logo-blue.png' ) ) ),
1037                 esc_url( get_site_icon_url( 64, admin_url( 'images/w-logo-blue.png' ) ) ),
1038                 esc_html( get_bloginfo( 'name' ) )
1039         );
1040
1041         $site_title = '<div class="wp-embed-site-title">' . $site_title . '</div>';
1042
1043         /**
1044          * Filters the site title HTML in the embed footer.
1045          *
1046          * @since 4.4.0
1047          *
1048          * @param string $site_title The site title HTML.
1049          */
1050         echo apply_filters( 'embed_site_title_html', $site_title );
1051 }
1052
1053 /**
1054  * Filters the oEmbed result before any HTTP requests are made.
1055  *
1056  * If the URL belongs to the current site, the result is fetched directly instead of
1057  * going through the oEmbed discovery process.
1058  *
1059  * @since 4.5.3
1060  *
1061  * @param null|string $result The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. Default null.
1062  * @param string      $url    The URL that should be inspected for discovery `<link>` tags.
1063  * @param array       $args   oEmbed remote get arguments.
1064  * @return null|string The UNSANITIZED (and potentially unsafe) HTML that should be used to embed.
1065  *                     Null if the URL does not belong to the current site.
1066  */
1067 function wp_filter_pre_oembed_result( $result, $url, $args ) {
1068         $post_id = url_to_postid( $url );
1069
1070         /** This filter is documented in wp-includes/class-wp-oembed-controller.php */
1071         $post_id = apply_filters( 'oembed_request_post_id', $post_id, $url );
1072
1073         if ( ! $post_id ) {
1074                 return $result;
1075         }
1076
1077         $width = isset( $args['width'] ) ? $args['width'] : 0;
1078
1079         $data = get_oembed_response_data( $post_id, $width );
1080         $data = _wp_oembed_get_object()->data2html( (object) $data, $url );
1081
1082         if ( ! $data ) {
1083                 return $result;
1084         }
1085
1086         return $data;
1087 }