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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 * @return array { 61 * Indexed array of the embed width and height in pixels. 62 * 63 * @type int $0 The embed width. 64 * @type int $1 The embed height. 65 * } 66 */ 67 function wp_embed_defaults( $url = '' ) { 68 if ( ! empty( $GLOBALS['content_width'] ) ) { 69 $width = (int) $GLOBALS['content_width']; 70 } 71 72 if ( empty( $width ) ) { 73 $width = 500; 74 } 75 76 $height = min( ceil( $width * 1.5 ), 1000 ); 77 78 /** 79 * Filters the default array of embed dimensions. 80 * 81 * @since 2.9.0 82 * 83 * @param int[] $size { 84 * Indexed array of the embed width and height in pixels. 85 * 86 * @type int $0 The embed width. 87 * @type int $1 The embed height. 88 * } 89 * @param string $url The URL that should be embedded. 90 */ 91 return apply_filters( 'embed_defaults', compact( 'width', 'height' ), $url ); 92 } 93 94 /** 95 * Attempts to fetch the embed HTML for a provided URL using oEmbed. 96 * 97 * @since 2.9.0 98 * 99 * @see WP_oEmbed 100 * 101 * @param string $url The URL that should be embedded. 102 * @param array $args { 103 * Optional. Additional arguments for retrieving embed HTML. Default empty. 104 * 105 * @type int|string $width Optional. The `maxwidth` value passed to the provider URL. 106 * @type int|string $height Optional. The `maxheight` value passed to the provider URL. 107 * @type bool $discover Optional. Determines whether to attempt to discover link tags 108 * at the given URL for an oEmbed provider when the provider URL 109 * is not found in the built-in providers list. Default true. 110 * } 111 * @return string|false The embed HTML on success, false on failure. 112 */ 113 function wp_oembed_get( $url, $args = '' ) { 114 $oembed = _wp_oembed_get_object(); 115 return $oembed->get_html( $url, $args ); 116 } 117 118 /** 119 * Returns the initialized WP_oEmbed object. 120 * 121 * @since 2.9.0 122 * @access private 123 * 124 * @return WP_oEmbed object. 125 */ 126 function _wp_oembed_get_object() { 127 static $wp_oembed = null; 128 129 if ( is_null( $wp_oembed ) ) { 130 $wp_oembed = new WP_oEmbed(); 131 } 132 return $wp_oembed; 133 } 134 135 /** 136 * Adds a URL format and oEmbed provider URL pair. 137 * 138 * @since 2.9.0 139 * 140 * @see WP_oEmbed 141 * 142 * @param string $format The format of URL that this provider can handle. You can use asterisks 143 * as wildcards. 144 * @param string $provider The URL to the oEmbed provider. 145 * @param bool $regex Optional. Whether the `$format` parameter is in a RegEx format. Default false. 146 */ 147 function wp_oembed_add_provider( $format, $provider, $regex = false ) { 148 if ( did_action( 'plugins_loaded' ) ) { 149 $oembed = _wp_oembed_get_object(); 150 $oembed->providers[ $format ] = array( $provider, $regex ); 151 } else { 152 WP_oEmbed::_add_provider_early( $format, $provider, $regex ); 153 } 154 } 155 156 /** 157 * Removes an oEmbed provider. 158 * 159 * @since 3.5.0 160 * 161 * @see WP_oEmbed 162 * 163 * @param string $format The URL format for the oEmbed provider to remove. 164 * @return bool Was the provider removed successfully? 165 */ 166 function wp_oembed_remove_provider( $format ) { 167 if ( did_action( 'plugins_loaded' ) ) { 168 $oembed = _wp_oembed_get_object(); 169 170 if ( isset( $oembed->providers[ $format ] ) ) { 171 unset( $oembed->providers[ $format ] ); 172 return true; 173 } 174 } else { 175 WP_oEmbed::_remove_provider_early( $format ); 176 } 177 178 return false; 179 } 180 181 /** 182 * Determines if default embed handlers should be loaded. 183 * 184 * Checks to make sure that the embeds library hasn't already been loaded. If 185 * it hasn't, then it will load the embeds library. 186 * 187 * @since 2.9.0 188 * 189 * @see wp_embed_register_handler() 190 */ 191 function wp_maybe_load_embeds() { 192 /** 193 * Filters whether to load the default embed handlers. 194 * 195 * Returning a falsey value will prevent loading the default embed handlers. 196 * 197 * @since 2.9.0 198 * 199 * @param bool $maybe_load_embeds Whether to load the embeds library. Default true. 200 */ 201 if ( ! apply_filters( 'load_default_embeds', true ) ) { 202 return; 203 } 204 205 wp_embed_register_handler( 'youtube_embed_url', '#https?://(www.)?youtube\.com/(?:v|embed)/([^/]+)#i', 'wp_embed_handler_youtube' ); 206 207 /** 208 * Filters the audio embed handler callback. 209 * 210 * @since 3.6.0 211 * 212 * @param callable $handler Audio embed handler callback function. 213 */ 214 wp_embed_register_handler( 'audio', '#^https?://.+?\.(' . implode( '|', wp_get_audio_extensions() ) . ')$#i', apply_filters( 'wp_audio_embed_handler', 'wp_embed_handler_audio' ), 9999 ); 215 216 /** 217 * Filters the video embed handler callback. 218 * 219 * @since 3.6.0 220 * 221 * @param callable $handler Video embed handler callback function. 222 */ 223 wp_embed_register_handler( 'video', '#^https?://.+?\.(' . implode( '|', wp_get_video_extensions() ) . ')$#i', apply_filters( 'wp_video_embed_handler', 'wp_embed_handler_video' ), 9999 ); 224 } 225 226 /** 227 * YouTube iframe embed handler callback. 228 * 229 * Catches YouTube iframe embed URLs that are not parsable by oEmbed but can be translated into a URL that is. 230 * 231 * @since 4.0.0 232 * 233 * @global WP_Embed $wp_embed 234 * 235 * @param array $matches The RegEx matches from the provided regex when calling 236 * wp_embed_register_handler(). 237 * @param array $attr Embed attributes. 238 * @param string $url The original URL that was matched by the regex. 239 * @param array $rawattr The original unmodified attributes. 240 * @return string The embed HTML. 241 */ 242 function wp_embed_handler_youtube( $matches, $attr, $url, $rawattr ) { 243 global $wp_embed; 244 $embed = $wp_embed->autoembed( sprintf( 'https://youtube.com/watch?v=%s', urlencode( $matches[2] ) ) ); 245 246 /** 247 * Filters the YoutTube embed output. 248 * 249 * @since 4.0.0 250 * 251 * @see wp_embed_handler_youtube() 252 * 253 * @param string $embed YouTube embed output. 254 * @param array $attr An array of embed attributes. 255 * @param string $url The original URL that was matched by the regex. 256 * @param array $rawattr The original unmodified attributes. 257 */ 258 return apply_filters( 'wp_embed_handler_youtube', $embed, $attr, $url, $rawattr ); 259 } 260 261 /** 262 * Audio embed handler callback. 263 * 264 * @since 3.6.0 265 * 266 * @param array $matches The RegEx matches from the provided regex when calling wp_embed_register_handler(). 267 * @param array $attr Embed attributes. 268 * @param string $url The original URL that was matched by the regex. 269 * @param array $rawattr The original unmodified attributes. 270 * @return string The embed HTML. 271 */ 272 function wp_embed_handler_audio( $matches, $attr, $url, $rawattr ) { 273 $audio = sprintf( '[audio src="%s" /]', esc_url( $url ) ); 274 275 /** 276 * Filters the audio embed output. 277 * 278 * @since 3.6.0 279 * 280 * @param string $audio Audio embed output. 281 * @param array $attr An array of embed attributes. 282 * @param string $url The original URL that was matched by the regex. 283 * @param array $rawattr The original unmodified attributes. 284 */ 285 return apply_filters( 'wp_embed_handler_audio', $audio, $attr, $url, $rawattr ); 286 } 287 288 /** 289 * Video embed handler callback. 290 * 291 * @since 3.6.0 292 * 293 * @param array $matches The RegEx matches from the provided regex when calling wp_embed_register_handler(). 294 * @param array $attr Embed attributes. 295 * @param string $url The original URL that was matched by the regex. 296 * @param array $rawattr The original unmodified attributes. 297 * @return string The embed HTML. 298 */ 299 function wp_embed_handler_video( $matches, $attr, $url, $rawattr ) { 300 $dimensions = ''; 301 if ( ! empty( $rawattr['width'] ) && ! empty( $rawattr['height'] ) ) { 302 $dimensions .= sprintf( 'width="%d" ', (int) $rawattr['width'] ); 303 $dimensions .= sprintf( 'height="%d" ', (int) $rawattr['height'] ); 304 } 305 $video = sprintf( '[video %s src="%s" /]', $dimensions, esc_url( $url ) ); 306 307 /** 308 * Filters the video embed output. 309 * 310 * @since 3.6.0 311 * 312 * @param string $video Video embed output. 313 * @param array $attr An array of embed attributes. 314 * @param string $url The original URL that was matched by the regex. 315 * @param array $rawattr The original unmodified attributes. 316 */ 317 return apply_filters( 'wp_embed_handler_video', $video, $attr, $url, $rawattr ); 318 } 319 320 /** 321 * Registers the oEmbed REST API route. 322 * 323 * @since 4.4.0 324 */ 325 function wp_oembed_register_route() { 326 $controller = new WP_oEmbed_Controller(); 327 $controller->register_routes(); 328 } 329 330 /** 331 * Adds oEmbed discovery links in the website <head>. 332 * 333 * @since 4.4.0 334 */ 335 function wp_oembed_add_discovery_links() { 336 $output = ''; 337 338 if ( is_singular() ) { 339 $output .= '<link rel="alternate" type="application/json+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink() ) ) . '" />' . "\n"; 340 341 if ( class_exists( 'SimpleXMLElement' ) ) { 342 $output .= '<link rel="alternate" type="text/xml+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink(), 'xml' ) ) . '" />' . "\n"; 343 } 344 } 345 346 /** 347 * Filters the oEmbed discovery links HTML. 348 * 349 * @since 4.4.0 350 * 351 * @param string $output HTML of the discovery links. 352 */ 353 echo apply_filters( 'oembed_discovery_links', $output ); 354 } 355 356 /** 357 * Adds the necessary JavaScript to communicate with the embedded iframes. 358 * 359 * @since 4.4.0 360 */ 361 function wp_oembed_add_host_js() { 362 wp_enqueue_script( 'wp-embed' ); 363 } 364 365 /** 366 * Retrieves the URL to embed a specific post in an iframe. 367 * 368 * @since 4.4.0 369 * 370 * @param int|WP_Post $post Optional. Post ID or object. Defaults to the current post. 371 * @return string|false The post embed URL on success, false if the post doesn't exist. 372 */ 373 function get_post_embed_url( $post = null ) { 374 $post = get_post( $post ); 375 376 if ( ! $post ) { 377 return false; 378 } 379 380 $embed_url = trailingslashit( get_permalink( $post ) ) . user_trailingslashit( 'embed' ); 381 $path_conflict = get_page_by_path( str_replace( home_url(), '', $embed_url ), OBJECT, get_post_types( array( 'public' => true ) ) ); 382 383 if ( ! get_option( 'permalink_structure' ) || $path_conflict ) { 384 $embed_url = add_query_arg( array( 'embed' => 'true' ), get_permalink( $post ) ); 385 } 386 387 /** 388 * Filters the URL to embed a specific post. 389 * 390 * @since 4.4.0 391 * 392 * @param string $embed_url The post embed URL. 393 * @param WP_Post $post The corresponding post object. 394 */ 395 return esc_url_raw( apply_filters( 'post_embed_url', $embed_url, $post ) ); 396 } 397 398 /** 399 * Retrieves the oEmbed endpoint URL for a given permalink. 400 * 401 * Pass an empty string as the first argument to get the endpoint base URL. 402 * 403 * @since 4.4.0 404 * 405 * @param string $permalink Optional. The permalink used for the `url` query arg. Default empty. 406 * @param string $format Optional. The requested response format. Default 'json'. 407 * @return string The oEmbed endpoint URL. 408 */ 409 function get_oembed_endpoint_url( $permalink = '', $format = 'json' ) { 410 $url = rest_url( 'oembed/1.0/embed' ); 411 412 if ( '' !== $permalink ) { 413 $url = add_query_arg( 414 array( 415 'url' => urlencode( $permalink ), 416 'format' => ( 'json' !== $format ) ? $format : false, 417 ), 418 $url 419 ); 420 } 421 422 /** 423 * Filters the oEmbed endpoint URL. 424 * 425 * @since 4.4.0 426 * 427 * @param string $url The URL to the oEmbed endpoint. 428 * @param string $permalink The permalink used for the `url` query arg. 429 * @param string $format The requested response format. 430 */ 431 return apply_filters( 'oembed_endpoint_url', $url, $permalink, $format ); 432 } 433 434 /** 435 * Retrieves the embed code for a specific post. 436 * 437 * @since 4.4.0 438 * 439 * @param int $width The width for the response. 440 * @param int $height The height for the response. 441 * @param int|WP_Post $post Optional. Post ID or object. Default is global `$post`. 442 * @return string|false Embed code on success, false if post doesn't exist. 443 */ 444 function get_post_embed_html( $width, $height, $post = null ) { 445 $post = get_post( $post ); 446 447 if ( ! $post ) { 448 return false; 449 } 450 451 $embed_url = get_post_embed_url( $post ); 452 453 $output = '<blockquote class="wp-embedded-content"><a href="' . esc_url( get_permalink( $post ) ) . '">' . get_the_title( $post ) . "</a></blockquote>\n"; 454 455 $output .= "<script type='text/javascript'>\n"; 456 $output .= "<!--//--><![CDATA[//><!--\n"; 457 if ( SCRIPT_DEBUG ) { 458 $output .= file_get_contents( ABSPATH . WPINC . '/js/wp-embed.js' ); 459 } else { 460 /* 461 * If you're looking at a src version of this file, you'll see an "include" 462 * statement below. This is used by the `npm run build` process to directly 463 * include a minified version of wp-embed.js, instead of using the 464 * file_get_contents() method from above. 465 * 466 * If you're looking at a build version of this file, you'll see a string of 467 * minified JavaScript. If you need to debug it, please turn on SCRIPT_DEBUG 468 * and edit wp-embed.js directly. 469 */ 470 $output .= <<<JS 471 /*! This file is auto-generated */ 472 !function(d,l){"use strict";var e=!1,o=!1;if(l.querySelector)if(d.addEventListener)e=!0;if(d.wp=d.wp||{},!d.wp.receiveEmbedMessage)if(d.wp.receiveEmbedMessage=function(e){var t=e.data;if(t)if(t.secret||t.message||t.value)if(!/[^a-zA-Z0-9]/.test(t.secret)){var r,a,i,s,n,o=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),c=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]');for(r=0;r<c.length;r++)c[r].style.display="none";for(r=0;r<o.length;r++)if(a=o[r],e.source===a.contentWindow){if(a.removeAttribute("style"),"height"===t.message){if(1e3<(i=parseInt(t.value,10)))i=1e3;else if(~~i<200)i=200;a.height=i}if("link"===t.message)if(s=l.createElement("a"),n=l.createElement("a"),s.href=a.getAttribute("src"),n.href=t.value,n.host===s.host)if(l.activeElement===a)d.top.location.href=t.value}}},e)d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",t,!1),d.addEventListener("load",t,!1);function t(){if(!o){o=!0;var e,t,r,a,i=-1!==navigator.appVersion.indexOf("MSIE 10"),s=!!navigator.userAgent.match(/Trident.*rv:11\./),n=l.querySelectorAll("iframe.wp-embedded-content");for(t=0;t<n.length;t++){if(!(r=n[t]).getAttribute("data-secret"))a=Math.random().toString(36).substr(2,10),r.src+="#?secret="+a,r.setAttribute("data-secret",a);if(i||s)(e=r.cloneNode(!0)).removeAttribute("security"),r.parentNode.replaceChild(e,r)}}}}(window,document); 473 JS; 474 } 475 $output .= "\n//--><!]]>"; 476 $output .= "\n</script>"; 477 478 $output .= sprintf( 479 '<iframe sandbox="allow-scripts" security="restricted" src="%1$s" width="%2$d" height="%3$d" title="%4$s" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe>', 480 esc_url( $embed_url ), 481 absint( $width ), 482 absint( $height ), 483 esc_attr( 484 sprintf( 485 /* translators: 1: Post title, 2: Site title. */ 486 __( '“%1$s” — %2$s' ), 487 get_the_title( $post ), 488 get_bloginfo( 'name' ) 489 ) 490 ) 491 ); 492 493 /** 494 * Filters the embed HTML output for a given post. 495 * 496 * @since 4.4.0 497 * 498 * @param string $output The default iframe tag to display embedded content. 499 * @param WP_Post $post Current post object. 500 * @param int $width Width of the response. 501 * @param int $height Height of the response. 502 */ 503 return apply_filters( 'embed_html', $output, $post, $width, $height ); 504 } 505 506 /** 507 * Retrieves the oEmbed response data for a given post. 508 * 509 * @since 4.4.0 510 * 511 * @param WP_Post|int $post Post object or ID. 512 * @param int $width The requested width. 513 * @return array|false Response data on success, false if post doesn't exist. 514 */ 515 function get_oembed_response_data( $post, $width ) { 516 $post = get_post( $post ); 517 $width = absint( $width ); 518 519 if ( ! $post ) { 520 return false; 521 } 522 523 if ( 'publish' !== get_post_status( $post ) ) { 524 return false; 525 } 526 527 /** 528 * Filters the allowed minimum and maximum widths for the oEmbed response. 529 * 530 * @since 4.4.0 531 * 532 * @param array $min_max_width { 533 * Minimum and maximum widths for the oEmbed response. 534 * 535 * @type int $min Minimum width. Default 200. 536 * @type int $max Maximum width. Default 600. 537 * } 538 */ 539 $min_max_width = apply_filters( 540 'oembed_min_max_width', 541 array( 542 'min' => 200, 543 'max' => 600, 544 ) 545 ); 546 547 $width = min( max( $min_max_width['min'], $width ), $min_max_width['max'] ); 548 $height = max( ceil( $width / 16 * 9 ), 200 ); 549 550 $data = array( 551 'version' => '1.0', 552 'provider_name' => get_bloginfo( 'name' ), 553 'provider_url' => get_home_url(), 554 'author_name' => get_bloginfo( 'name' ), 555 'author_url' => get_home_url(), 556 'title' => get_the_title( $post ), 557 'type' => 'link', 558 ); 559 560 $author = get_userdata( $post->post_author ); 561 562 if ( $author ) { 563 $data['author_name'] = $author->display_name; 564 $data['author_url'] = get_author_posts_url( $author->ID ); 565 } 566 567 /** 568 * Filters the oEmbed response data. 569 * 570 * @since 4.4.0 571 * 572 * @param array $data The response data. 573 * @param WP_Post $post The post object. 574 * @param int $width The requested width. 575 * @param int $height The calculated height. 576 */ 577 return apply_filters( 'oembed_response_data', $data, $post, $width, $height ); 578 } 579 580 581 /** 582 * Retrieves the oEmbed response data for a given URL. 583 * 584 * @since 5.0.0 585 * 586 * @param string $url The URL that should be inspected for discovery `<link>` tags. 587 * @param array $args oEmbed remote get arguments. 588 * @return object|false oEmbed response data if the URL does belong to the current site. False otherwise. 589 */ 590 function get_oembed_response_data_for_url( $url, $args ) { 591 $switched_blog = false; 592 593 if ( is_multisite() ) { 594 $url_parts = wp_parse_args( 595 wp_parse_url( $url ), 596 array( 597 'host' => '', 598 'path' => '/', 599 ) 600 ); 601 602 $qv = array( 603 'domain' => $url_parts['host'], 604 'path' => '/', 605 'update_site_meta_cache' => false, 606 ); 607 608 // In case of subdirectory configs, set the path. 609 if ( ! is_subdomain_install() ) { 610 $path = explode( '/', ltrim( $url_parts['path'], '/' ) ); 611 $path = reset( $path ); 612 613 if ( $path ) { 614 $qv['path'] = get_network()->path . $path . '/'; 615 } 616 } 617 618 $sites = get_sites( $qv ); 619 $site = reset( $sites ); 620 621 // Do not allow embeds for deleted/archived/spam sites. 622 if ( ! empty( $site->deleted ) || ! empty( $site->spam ) || ! empty( $site->archived ) ) { 623 return false; 624 } 625 626 if ( $site && get_current_blog_id() !== (int) $site->blog_id ) { 627 switch_to_blog( $site->blog_id ); 628 $switched_blog = true; 629 } 630 } 631 632 $post_id = url_to_postid( $url ); 633 634 /** This filter is documented in wp-includes/class-wp-oembed-controller.php */ 635 $post_id = apply_filters( 'oembed_request_post_id', $post_id, $url ); 636 637 if ( ! $post_id ) { 638 if ( $switched_blog ) { 639 restore_current_blog(); 640 } 641 642 return false; 643 } 644 645 $width = isset( $args['width'] ) ? $args['width'] : 0; 646 647 $data = get_oembed_response_data( $post_id, $width ); 648 649 if ( $switched_blog ) { 650 restore_current_blog(); 651 } 652 653 return $data ? (object) $data : false; 654 } 655 656 657 /** 658 * Filters the oEmbed response data to return an iframe embed code. 659 * 660 * @since 4.4.0 661 * 662 * @param array $data The response data. 663 * @param WP_Post $post The post object. 664 * @param int $width The requested width. 665 * @param int $height The calculated height. 666 * @return array The modified response data. 667 */ 668 function get_oembed_response_data_rich( $data, $post, $width, $height ) { 669 $data['width'] = absint( $width ); 670 $data['height'] = absint( $height ); 671 $data['type'] = 'rich'; 672 $data['html'] = get_post_embed_html( $width, $height, $post ); 673 674 // Add post thumbnail to response if available. 675 $thumbnail_id = false; 676 677 if ( has_post_thumbnail( $post->ID ) ) { 678 $thumbnail_id = get_post_thumbnail_id( $post->ID ); 679 } 680 681 if ( 'attachment' === get_post_type( $post ) ) { 682 if ( wp_attachment_is_image( $post ) ) { 683 $thumbnail_id = $post->ID; 684 } elseif ( wp_attachment_is( 'video', $post ) ) { 685 $thumbnail_id = get_post_thumbnail_id( $post ); 686 $data['type'] = 'video'; 687 } 688 } 689 690 if ( $thumbnail_id ) { 691 list( $thumbnail_url, $thumbnail_width, $thumbnail_height ) = wp_get_attachment_image_src( $thumbnail_id, array( $width, 99999 ) ); 692 $data['thumbnail_url'] = $thumbnail_url; 693 $data['thumbnail_width'] = $thumbnail_width; 694 $data['thumbnail_height'] = $thumbnail_height; 695 } 696 697 return $data; 698 } 699 700 /** 701 * Ensures that the specified format is either 'json' or 'xml'. 702 * 703 * @since 4.4.0 704 * 705 * @param string $format The oEmbed response format. Accepts 'json' or 'xml'. 706 * @return string The format, either 'xml' or 'json'. Default 'json'. 707 */ 708 function wp_oembed_ensure_format( $format ) { 709 if ( ! in_array( $format, array( 'json', 'xml' ), true ) ) { 710 return 'json'; 711 } 712 713 return $format; 714 } 715 716 /** 717 * Hooks into the REST API output to print XML instead of JSON. 718 * 719 * This is only done for the oEmbed API endpoint, 720 * which supports both formats. 721 * 722 * @access private 723 * @since 4.4.0 724 * 725 * @param bool $served Whether the request has already been served. 726 * @param WP_HTTP_ResponseInterface $result Result to send to the client. Usually a WP_REST_Response. 727 * @param WP_REST_Request $request Request used to generate the response. 728 * @param WP_REST_Server $server Server instance. 729 * @return true 730 */ 731 function _oembed_rest_pre_serve_request( $served, $result, $request, $server ) { 732 $params = $request->get_params(); 733 734 if ( '/oembed/1.0/embed' !== $request->get_route() || 'GET' !== $request->get_method() ) { 735 return $served; 736 } 737 738 if ( ! isset( $params['format'] ) || 'xml' !== $params['format'] ) { 739 return $served; 740 } 741 742 // Embed links inside the request. 743 $data = $server->response_to_data( $result, false ); 744 745 if ( ! class_exists( 'SimpleXMLElement' ) ) { 746 status_header( 501 ); 747 die( get_status_header_desc( 501 ) ); 748 } 749 750 $result = _oembed_create_xml( $data ); 751 752 // Bail if there's no XML. 753 if ( ! $result ) { 754 status_header( 501 ); 755 return get_status_header_desc( 501 ); 756 } 757 758 if ( ! headers_sent() ) { 759 $server->send_header( 'Content-Type', 'text/xml; charset=' . get_option( 'blog_charset' ) ); 760 } 761 762 echo $result; 763 764 return true; 765 } 766 767 /** 768 * Creates an XML string from a given array. 769 * 770 * @since 4.4.0 771 * @access private 772 * 773 * @param array $data The original oEmbed response data. 774 * @param SimpleXMLElement $node Optional. XML node to append the result to recursively. 775 * @return string|false XML string on success, false on error. 776 */ 777 function _oembed_create_xml( $data, $node = null ) { 778 if ( ! is_array( $data ) || empty( $data ) ) { 779 return false; 780 } 781 782 if ( null === $node ) { 783 $node = new SimpleXMLElement( '<oembed></oembed>' ); 784 } 785 786 foreach ( $data as $key => $value ) { 787 if ( is_numeric( $key ) ) { 788 $key = 'oembed'; 789 } 790 791 if ( is_array( $value ) ) { 792 $item = $node->addChild( $key ); 793 _oembed_create_xml( $value, $item ); 794 } else { 795 $node->addChild( $key, esc_html( $value ) ); 796 } 797 } 798 799 return $node->asXML(); 800 } 801 802 /** 803 * Filters the given oEmbed HTML to make sure iframes have a title attribute. 804 * 805 * @since 5.2.0 806 * 807 * @param string $result The oEmbed HTML result. 808 * @param object $data A data object result from an oEmbed provider. 809 * @param string $url The URL of the content to be embedded. 810 * @return string The filtered oEmbed result. 811 */ 812 function wp_filter_oembed_iframe_title_attribute( $result, $data, $url ) { 813 if ( false === $result || ! in_array( $data->type, array( 'rich', 'video' ), true ) ) { 814 return $result; 815 } 816 817 $title = ! empty( $data->title ) ? $data->title : ''; 818 819 $pattern = '`<iframe([^>]*)>`i'; 820 if ( preg_match( $pattern, $result, $matches ) ) { 821 $attrs = wp_kses_hair( $matches[1], wp_allowed_protocols() ); 822 823 foreach ( $attrs as $attr => $item ) { 824 $lower_attr = strtolower( $attr ); 825 if ( $lower_attr === $attr ) { 826 continue; 827 } 828 if ( ! isset( $attrs[ $lower_attr ] ) ) { 829 $attrs[ $lower_attr ] = $item; 830 unset( $attrs[ $attr ] ); 831 } 832 } 833 } 834 835 if ( ! empty( $attrs['title']['value'] ) ) { 836 $title = $attrs['title']['value']; 837 } 838 839 /** 840 * Filters the title attribute of the given oEmbed HTML iframe. 841 * 842 * @since 5.2.0 843 * 844 * @param string $title The title attribute. 845 * @param string $result The oEmbed HTML result. 846 * @param object $data A data object result from an oEmbed provider. 847 * @param string $url The URL of the content to be embedded. 848 */ 849 $title = apply_filters( 'oembed_iframe_title_attribute', $title, $result, $data, $url ); 850 851 if ( '' === $title ) { 852 return $result; 853 } 854 855 if ( isset( $attrs['title'] ) ) { 856 unset( $attrs['title'] ); 857 $attr_string = implode( ' ', wp_list_pluck( $attrs, 'whole' ) ); 858 $result = str_replace( $matches[0], '<iframe ' . trim( $attr_string ) . '>', $result ); 859 } 860 return str_ireplace( '<iframe ', sprintf( '<iframe title="%s" ', esc_attr( $title ) ), $result ); 861 } 862 863 864 /** 865 * Filters the given oEmbed HTML. 866 * 867 * If the `$url` isn't on the trusted providers list, 868 * we need to filter the HTML heavily for security. 869 * 870 * Only filters 'rich' and 'video' response types. 871 * 872 * @since 4.4.0 873 * 874 * @param string $result The oEmbed HTML result. 875 * @param object $data A data object result from an oEmbed provider. 876 * @param string $url The URL of the content to be embedded. 877 * @return string The filtered and sanitized oEmbed result. 878 */ 879 function wp_filter_oembed_result( $result, $data, $url ) { 880 if ( false === $result || ! in_array( $data->type, array( 'rich', 'video' ), true ) ) { 881 return $result; 882 } 883 884 $wp_oembed = _wp_oembed_get_object(); 885 886 // Don't modify the HTML for trusted providers. 887 if ( false !== $wp_oembed->get_provider( $url, array( 'discover' => false ) ) ) { 888 return $result; 889 } 890 891 $allowed_html = array( 892 'a' => array( 893 'href' => true, 894 ), 895 'blockquote' => array(), 896 'iframe' => array( 897 'src' => true, 898 'width' => true, 899 'height' => true, 900 'frameborder' => true, 901 'marginwidth' => true, 902 'marginheight' => true, 903 'scrolling' => true, 904 'title' => true, 905 ), 906 ); 907 908 $html = wp_kses( $result, $allowed_html ); 909 910 preg_match( '|(<blockquote>.*?</blockquote>)?.*(<iframe.*?></iframe>)|ms', $html, $content ); 911 // We require at least the iframe to exist. 912 if ( empty( $content[2] ) ) { 913 return false; 914 } 915 $html = $content[1] . $content[2]; 916 917 preg_match( '/ src=([\'"])(.*?)\1/', $html, $results ); 918 919 if ( ! empty( $results ) ) { 920 $secret = wp_generate_password( 10, false ); 921 922 $url = esc_url( "{$results[2]}#?secret=$secret" ); 923 $q = $results[1]; 924 925 $html = str_replace( $results[0], ' src=' . $q . $url . $q . ' data-secret=' . $q . $secret . $q, $html ); 926 $html = str_replace( '<blockquote', "<blockquote data-secret=\"$secret\"", $html ); 927 } 928 929 $allowed_html['blockquote']['data-secret'] = true; 930 $allowed_html['iframe']['data-secret'] = true; 931 932 $html = wp_kses( $html, $allowed_html ); 933 934 if ( ! empty( $content[1] ) ) { 935 // We have a blockquote to fall back on. Hide the iframe by default. 936 $html = str_replace( '<iframe', '<iframe style="position: absolute; clip: rect(1px, 1px, 1px, 1px);"', $html ); 937 $html = str_replace( '<blockquote', '<blockquote class="wp-embedded-content"', $html ); 938 } 939 940 $html = str_ireplace( '<iframe', '<iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted"', $html ); 941 942 return $html; 943 } 944 945 /** 946 * Filters the string in the 'more' link displayed after a trimmed excerpt. 947 * 948 * Replaces '[...]' (appended to automatically generated excerpts) with an 949 * ellipsis and a "Continue reading" link in the embed template. 950 * 951 * @since 4.4.0 952 * 953 * @param string $more_string Default 'more' string. 954 * @return string 'Continue reading' link prepended with an ellipsis. 955 */ 956 function wp_embed_excerpt_more( $more_string ) { 957 if ( ! is_embed() ) { 958 return $more_string; 959 } 960 961 $link = sprintf( 962 '<a href="%1$s" class="wp-embed-more" target="_top">%2$s</a>', 963 esc_url( get_permalink() ), 964 /* translators: %s: Post title. */ 965 sprintf( __( 'Continue reading %s' ), '<span class="screen-reader-text">' . get_the_title() . '</span>' ) 966 ); 967 return ' … ' . $link; 968 } 969 970 /** 971 * Displays the post excerpt for the embed template. 972 * 973 * Intended to be used in 'The Loop'. 974 * 975 * @since 4.4.0 976 */ 977 function the_excerpt_embed() { 978 $output = get_the_excerpt(); 979 980 /** 981 * Filters the post excerpt for the embed template. 982 * 983 * @since 4.4.0 984 * 985 * @param string $output The current post excerpt. 986 */ 987 echo apply_filters( 'the_excerpt_embed', $output ); 988 } 989 990 /** 991 * Filters the post excerpt for the embed template. 992 * 993 * Shows players for video and audio attachments. 994 * 995 * @since 4.4.0 996 * 997 * @param string $content The current post excerpt. 998 * @return string The modified post excerpt. 999 */ 1000 function wp_embed_excerpt_attachment( $content ) { 1001 if ( is_attachment() ) { 1002 return prepend_attachment( '' ); 1003 } 1004 1005 return $content; 1006 } 1007 1008 /** 1009 * Enqueues embed iframe default CSS and JS. 1010 * 1011 * Enqueue PNG fallback CSS for embed iframe for legacy versions of IE. 1012 * 1013 * Allows plugins to queue scripts for the embed iframe end using wp_enqueue_script(). 1014 * Runs first in oembed_head(). 1015 * 1016 * @since 4.4.0 1017 */ 1018 function enqueue_embed_scripts() { 1019 wp_enqueue_style( 'wp-embed-template-ie' ); 1020 1021 /** 1022 * Fires when scripts and styles are enqueued for the embed iframe. 1023 * 1024 * @since 4.4.0 1025 */ 1026 do_action( 'enqueue_embed_scripts' ); 1027 } 1028 1029 /** 1030 * Prints the CSS in the embed iframe header. 1031 * 1032 * @since 4.4.0 1033 */ 1034 function print_embed_styles() { 1035 $type_attr = current_theme_supports( 'html5', 'style' ) ? '' : ' type="text/css"'; 1036 ?> 1037 <style<?php echo $type_attr; ?>> 1038 <?php 1039 if ( SCRIPT_DEBUG ) { 1040 readfile( ABSPATH . WPINC . '/css/wp-embed-template.css' ); 1041 } else { 1042 /* 1043 * If you're looking at a src version of this file, you'll see an "include" 1044 * statement below. This is used by the `npm run build` process to directly 1045 * include a minified version of wp-oembed-embed.css, instead of using the 1046 * readfile() method from above. 1047 * 1048 * If you're looking at a build version of this file, you'll see a string of 1049 * minified CSS. If you need to debug it, please turn on SCRIPT_DEBUG 1050 * and edit wp-embed-template.css directly. 1051 */ 1052 ?> 1053 /*! 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0;padding:0 11px 0 0;border-left:none;border-right:1px solid #aaa} 1055 <?php 1056 } 1057 ?> 1058 </style> 1059 <?php 1060 } 1061 1062 /** 1063 * Prints the JavaScript in the embed iframe header. 1064 * 1065 * @since 4.4.0 1066 */ 1067 function print_embed_scripts() { 1068 $type_attr = current_theme_supports( 'html5', 'script' ) ? '' : ' type="text/javascript"'; 1069 ?> 1070 <script<?php echo $type_attr; ?>> 1071 <?php 1072 if ( SCRIPT_DEBUG ) { 1073 readfile( ABSPATH . WPINC . '/js/wp-embed-template.js' ); 1074 } else { 1075 /* 1076 * If you're looking at a src version of this file, you'll see an "include" 1077 * statement below. This is used by the `npm run build` process to directly 1078 * include a minified version of wp-embed-template.js, instead of using the 1079 * readfile() method from above. 1080 * 1081 * If you're looking at a build version of this file, you'll see a string of 1082 * minified JavaScript. If you need to debug it, please turn on SCRIPT_DEBUG 1083 * and edit wp-embed-template.js directly. 1084 */ 1085 ?> 1086 /*! This file is auto-generated */ 1087 !function(u,c){"use strict";var r,t,e,n=c.querySelector&&u.addEventListener,f=!1;function b(e,t){u.parent.postMessage({message:e,value:t,secret:r},"*")}function i(){if(!f){f=!0;var e,t=c.querySelector(".wp-embed-share-dialog"),r=c.querySelector(".wp-embed-share-dialog-open"),n=c.querySelector(".wp-embed-share-dialog-close"),i=c.querySelectorAll(".wp-embed-share-input"),a=c.querySelectorAll(".wp-embed-share-tab-button button"),o=c.querySelector(".wp-embed-featured-image img");if(i)for(e=0;e<i.length;e++)i[e].addEventListener("click",function(e){e.target.select()});if(r&&r.addEventListener("click",function(){t.className=t.className.replace("hidden",""),c.querySelector('.wp-embed-share-tab-button [aria-selected="true"]').focus()}),n&&n.addEventListener("click",function(){l()}),a)for(e=0;e<a.length;e++)a[e].addEventListener("click",s),a[e].addEventListener("keydown",d);c.addEventListener("keydown",function(e){27===e.keyCode&&-1===t.className.indexOf("hidden")?l():9===e.keyCode&&function(e){var t=c.querySelector('.wp-embed-share-tab-button [aria-selected="true"]');n!==e.target||e.shiftKey?t===e.target&&e.shiftKey&&(n.focus(),e.preventDefault()):(t.focus(),e.preventDefault())}(e)},!1),u.self!==u.top&&(b("height",Math.ceil(c.body.getBoundingClientRect().height)),o&&o.addEventListener("load",function(){b("height",Math.ceil(c.body.getBoundingClientRect().height))}),c.addEventListener("click",function(e){var t,r=e.target;t=r.hasAttribute("href")?r.getAttribute("href"):r.parentElement.getAttribute("href"),event.altKey||event.ctrlKey||event.metaKey||event.shiftKey||t&&(b("link",t),e.preventDefault())}))}function l(){t.className+=" hidden",c.querySelector(".wp-embed-share-dialog-open").focus()}function s(e){var t=c.querySelector('.wp-embed-share-tab-button [aria-selected="true"]');t.setAttribute("aria-selected","false"),c.querySelector("#"+t.getAttribute("aria-controls")).setAttribute("aria-hidden","true"),e.target.setAttribute("aria-selected","true"),c.querySelector("#"+e.target.getAttribute("aria-controls")).setAttribute("aria-hidden","false")}function d(e){var t,r,n=e.target,i=n.parentElement.previousElementSibling,a=n.parentElement.nextElementSibling;if(37===e.keyCode)t=i;else{if(39!==e.keyCode)return!1;t=a}"rtl"===c.documentElement.getAttribute("dir")&&(t=t===i?a:i),t&&(r=t.firstElementChild,n.setAttribute("tabindex","-1"),n.setAttribute("aria-selected",!1),c.querySelector("#"+n.getAttribute("aria-controls")).setAttribute("aria-hidden","true"),r.setAttribute("tabindex","0"),r.setAttribute("aria-selected","true"),r.focus(),c.querySelector("#"+r.getAttribute("aria-controls")).setAttribute("aria-hidden","false"))}}n&&(!function e(){u.self===u.top||r||(r=u.location.hash.replace(/.*secret=([\d\w]{10}).*/,"$1"),clearTimeout(t),t=setTimeout(function(){e()},100))}(),c.documentElement.className=c.documentElement.className.replace(/\bno-js\b/,"")+" js",c.addEventListener("DOMContentLoaded",i,!1),u.addEventListener("load",i,!1),u.addEventListener("resize",function(){u.self!==u.top&&(clearTimeout(e),e=setTimeout(function(){b("height",Math.ceil(c.body.getBoundingClientRect().height))},100))},!1))}(window,document); 1088 <?php 1089 } 1090 ?> 1091 </script> 1092 <?php 1093 } 1094 1095 /** 1096 * Prepare the oembed HTML to be displayed in an RSS feed. 1097 * 1098 * @since 4.4.0 1099 * @access private 1100 * 1101 * @param string $content The content to filter. 1102 * @return string The filtered content. 1103 */ 1104 function _oembed_filter_feed_content( $content ) { 1105 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 ); 1106 } 1107 1108 /** 1109 * Prints the necessary markup for the embed comments button. 1110 * 1111 * @since 4.4.0 1112 */ 1113 function print_embed_comments_button() { 1114 if ( is_404() || ! ( get_comments_number() || comments_open() ) ) { 1115 return; 1116 } 1117 ?> 1118 <div class="wp-embed-comments"> 1119 <a href="<?php comments_link(); ?>" target="_top"> 1120 <span class="dashicons dashicons-admin-comments"></span> 1121 <?php 1122 printf( 1123 /* translators: %s: Number of comments. */ 1124 _n( 1125 '%s <span class="screen-reader-text">Comment</span>', 1126 '%s <span class="screen-reader-text">Comments</span>', 1127 get_comments_number() 1128 ), 1129 number_format_i18n( get_comments_number() ) 1130 ); 1131 ?> 1132 </a> 1133 </div> 1134 <?php 1135 } 1136 1137 /** 1138 * Prints the necessary markup for the embed sharing button. 1139 * 1140 * @since 4.4.0 1141 */ 1142 function print_embed_sharing_button() { 1143 if ( is_404() ) { 1144 return; 1145 } 1146 ?> 1147 <div class="wp-embed-share"> 1148 <button type="button" class="wp-embed-share-dialog-open" aria-label="<?php esc_attr_e( 'Open sharing dialog' ); ?>"> 1149 <span class="dashicons dashicons-share"></span> 1150 </button> 1151 </div> 1152 <?php 1153 } 1154 1155 /** 1156 * Prints the necessary markup for the embed sharing dialog. 1157 * 1158 * @since 4.4.0 1159 */ 1160 function print_embed_sharing_dialog() { 1161 if ( is_404() ) { 1162 return; 1163 } 1164 ?> 1165 <div class="wp-embed-share-dialog hidden" role="dialog" aria-label="<?php esc_attr_e( 'Sharing options' ); ?>"> 1166 <div class="wp-embed-share-dialog-content"> 1167 <div class="wp-embed-share-dialog-text"> 1168 <ul class="wp-embed-share-tabs" role="tablist"> 1169 <li class="wp-embed-share-tab-button wp-embed-share-tab-button-wordpress" role="presentation"> 1170 <button type="button" role="tab" aria-controls="wp-embed-share-tab-wordpress" aria-selected="true" tabindex="0"><?php esc_html_e( 'WordPress Embed' ); ?></button> 1171 </li> 1172 <li class="wp-embed-share-tab-button wp-embed-share-tab-button-html" role="presentation"> 1173 <button type="button" role="tab" aria-controls="wp-embed-share-tab-html" aria-selected="false" tabindex="-1"><?php esc_html_e( 'HTML Embed' ); ?></button> 1174 </li> 1175 </ul> 1176 <div id="wp-embed-share-tab-wordpress" class="wp-embed-share-tab" role="tabpanel" aria-hidden="false"> 1177 <input type="text" value="<?php the_permalink(); ?>" class="wp-embed-share-input" aria-describedby="wp-embed-share-description-wordpress" tabindex="0" readonly/> 1178 1179 <p class="wp-embed-share-description" id="wp-embed-share-description-wordpress"> 1180 <?php _e( 'Copy and paste this URL into your WordPress site to embed' ); ?> 1181 </p> 1182 </div> 1183 <div id="wp-embed-share-tab-html" class="wp-embed-share-tab" role="tabpanel" aria-hidden="true"> 1184 <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> 1185 1186 <p class="wp-embed-share-description" id="wp-embed-share-description-html"> 1187 <?php _e( 'Copy and paste this code into your site to embed' ); ?> 1188 </p> 1189 </div> 1190 </div> 1191 1192 <button type="button" class="wp-embed-share-dialog-close" aria-label="<?php esc_attr_e( 'Close sharing dialog' ); ?>"> 1193 <span class="dashicons dashicons-no"></span> 1194 </button> 1195 </div> 1196 </div> 1197 <?php 1198 } 1199 1200 /** 1201 * Prints the necessary markup for the site title in an embed template. 1202 * 1203 * @since 4.5.0 1204 */ 1205 function the_embed_site_title() { 1206 $site_title = sprintf( 1207 '<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>', 1208 esc_url( home_url() ), 1209 esc_url( get_site_icon_url( 32, includes_url( 'images/w-logo-blue.png' ) ) ), 1210 esc_url( get_site_icon_url( 64, includes_url( 'images/w-logo-blue.png' ) ) ), 1211 esc_html( get_bloginfo( 'name' ) ) 1212 ); 1213 1214 $site_title = '<div class="wp-embed-site-title">' . $site_title . '</div>'; 1215 1216 /** 1217 * Filters the site title HTML in the embed footer. 1218 * 1219 * @since 4.4.0 1220 * 1221 * @param string $site_title The site title HTML. 1222 */ 1223 echo apply_filters( 'embed_site_title_html', $site_title ); 1224 } 1225 1226 /** 1227 * Filters the oEmbed result before any HTTP requests are made. 1228 * 1229 * If the URL belongs to the current site, the result is fetched directly instead of 1230 * going through the oEmbed discovery process. 1231 * 1232 * @since 4.5.3 1233 * 1234 * @param null|string $result The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. Default null. 1235 * @param string $url The URL that should be inspected for discovery `<link>` tags. 1236 * @param array $args oEmbed remote get arguments. 1237 * @return null|string The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. 1238 * Null if the URL does not belong to the current site. 1239 */ 1240 function wp_filter_pre_oembed_result( $result, $url, $args ) { 1241 $data = get_oembed_response_data_for_url( $url, $args ); 1242 1243 if ( $data ) { 1244 return _wp_oembed_get_object()->data2html( $data, $url ); 1245 } 1246 1247 return $result; 1248 }
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| Generated: Thu Dec 3 01:00:04 2020 | Cross-referenced by PHPXref 0.7.1 |