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1 <?php 2 /** 3 * oEmbed API: Top-level oEmbed functionality 4 * 5 * @package WordPress 6 * @subpackage oEmbed 7 * @since 4.4.0 8 */ 9 10 /** 11 * Registers an embed handler. 12 * 13 * Should probably only be used for sites that do not support oEmbed. 14 * 15 * @since 2.9.0 16 * 17 * @global WP_Embed $wp_embed 18 * 19 * @param string $id An internal ID/name for the handler. Needs to be unique. 20 * @param string $regex The regex that will be used to see if this handler should be used for a URL. 21 * @param callable $callback The callback function that will be called if the regex is matched. 22 * @param int $priority Optional. Used to specify the order in which the registered handlers will 23 * be tested. Default 10. 24 */ 25 function wp_embed_register_handler( $id, $regex, $callback, $priority = 10 ) { 26 global $wp_embed; 27 $wp_embed->register_handler( $id, $regex, $callback, $priority ); 28 } 29 30 /** 31 * Unregisters a previously-registered embed handler. 32 * 33 * @since 2.9.0 34 * 35 * @global WP_Embed $wp_embed 36 * 37 * @param string $id The handler ID that should be removed. 38 * @param int $priority Optional. The priority of the handler to be removed. Default 10. 39 */ 40 function wp_embed_unregister_handler( $id, $priority = 10 ) { 41 global $wp_embed; 42 $wp_embed->unregister_handler( $id, $priority ); 43 } 44 45 /** 46 * Creates default array of embed parameters. 47 * 48 * The width defaults to the content width as specified by the theme. If the 49 * theme does not specify a content width, then 500px is used. 50 * 51 * The default height is 1.5 times the width, or 1000px, whichever is smaller. 52 * 53 * The {@see 'embed_defaults'} filter can be used to adjust either of these values. 54 * 55 * @since 2.9.0 56 * 57 * @global int $content_width 58 * 59 * @param string $url Optional. The URL that should be embedded. Default empty. 60 * 61 * @return array { 62 * Indexed array of the embed width and height in pixels. 63 * 64 * @type int $0 The embed width. 65 * @type int $1 The embed height. 66 * } 67 */ 68 function wp_embed_defaults( $url = '' ) { 69 if ( ! empty( $GLOBALS['content_width'] ) ) { 70 $width = (int) $GLOBALS['content_width']; 71 } 72 73 if ( empty( $width ) ) { 74 $width = 500; 75 } 76 77 $height = min( ceil( $width * 1.5 ), 1000 ); 78 79 /** 80 * Filters the default array of embed dimensions. 81 * 82 * @since 2.9.0 83 * 84 * @param array $size { 85 * Indexed array of the embed width and height in pixels. 86 * 87 * @type int $0 The embed width. 88 * @type int $1 The embed height. 89 * } 90 * @param string $url The URL that should be embedded. 91 */ 92 return apply_filters( 'embed_defaults', compact( 'width', 'height' ), $url ); 93 } 94 95 /** 96 * Attempts to fetch the embed HTML for a provided URL using oEmbed. 97 * 98 * @since 2.9.0 99 * 100 * @see WP_oEmbed 101 * 102 * @param string $url The URL that should be embedded. 103 * @param array $args Optional. Additional arguments and parameters for retrieving embed HTML. 104 * Default empty. 105 * @return string|false The embed HTML on success, false on failure. 106 */ 107 function wp_oembed_get( $url, $args = '' ) { 108 $oembed = _wp_oembed_get_object(); 109 return $oembed->get_html( $url, $args ); 110 } 111 112 /** 113 * Returns the initialized WP_oEmbed object. 114 * 115 * @since 2.9.0 116 * @access private 117 * 118 * @staticvar WP_oEmbed $wp_oembed 119 * 120 * @return WP_oEmbed object. 121 */ 122 function _wp_oembed_get_object() { 123 static $wp_oembed = null; 124 125 if ( is_null( $wp_oembed ) ) { 126 $wp_oembed = new WP_oEmbed(); 127 } 128 return $wp_oembed; 129 } 130 131 /** 132 * Adds a URL format and oEmbed provider URL pair. 133 * 134 * @since 2.9.0 135 * 136 * @see WP_oEmbed 137 * 138 * @param string $format The format of URL that this provider can handle. You can use asterisks 139 * as wildcards. 140 * @param string $provider The URL to the oEmbed provider. 141 * @param boolean $regex Optional. Whether the `$format` parameter is in a RegEx format. Default false. 142 */ 143 function wp_oembed_add_provider( $format, $provider, $regex = false ) { 144 if ( did_action( 'plugins_loaded' ) ) { 145 $oembed = _wp_oembed_get_object(); 146 $oembed->providers[ $format ] = array( $provider, $regex ); 147 } else { 148 WP_oEmbed::_add_provider_early( $format, $provider, $regex ); 149 } 150 } 151 152 /** 153 * Removes an oEmbed provider. 154 * 155 * @since 3.5.0 156 * 157 * @see WP_oEmbed 158 * 159 * @param string $format The URL format for the oEmbed provider to remove. 160 * @return bool Was the provider removed successfully? 161 */ 162 function wp_oembed_remove_provider( $format ) { 163 if ( did_action( 'plugins_loaded' ) ) { 164 $oembed = _wp_oembed_get_object(); 165 166 if ( isset( $oembed->providers[ $format ] ) ) { 167 unset( $oembed->providers[ $format ] ); 168 return true; 169 } 170 } else { 171 WP_oEmbed::_remove_provider_early( $format ); 172 } 173 174 return false; 175 } 176 177 /** 178 * Determines if default embed handlers should be loaded. 179 * 180 * Checks to make sure that the embeds library hasn't already been loaded. If 181 * it hasn't, then it will load the embeds library. 182 * 183 * @since 2.9.0 184 * 185 * @see wp_embed_register_handler() 186 */ 187 function wp_maybe_load_embeds() { 188 /** 189 * Filters whether to load the default embed handlers. 190 * 191 * Returning a falsey value will prevent loading the default embed handlers. 192 * 193 * @since 2.9.0 194 * 195 * @param bool $maybe_load_embeds Whether to load the embeds library. Default true. 196 */ 197 if ( ! apply_filters( 'load_default_embeds', true ) ) { 198 return; 199 } 200 201 wp_embed_register_handler( 'youtube_embed_url', '#https?://(www.)?youtube\.com/(?:v|embed)/([^/]+)#i', 'wp_embed_handler_youtube' ); 202 203 /** 204 * Filters the audio embed handler callback. 205 * 206 * @since 3.6.0 207 * 208 * @param callable $handler Audio embed handler callback function. 209 */ 210 wp_embed_register_handler( 'audio', '#^https?://.+?\.(' . join( '|', wp_get_audio_extensions() ) . ')$#i', apply_filters( 'wp_audio_embed_handler', 'wp_embed_handler_audio' ), 9999 ); 211 212 /** 213 * Filters the video embed handler callback. 214 * 215 * @since 3.6.0 216 * 217 * @param callable $handler Video embed handler callback function. 218 */ 219 wp_embed_register_handler( 'video', '#^https?://.+?\.(' . join( '|', wp_get_video_extensions() ) . ')$#i', apply_filters( 'wp_video_embed_handler', 'wp_embed_handler_video' ), 9999 ); 220 } 221 222 /** 223 * YouTube iframe embed handler callback. 224 * 225 * Catches YouTube iframe embed URLs that are not parsable by oEmbed but can be translated into a URL that is. 226 * 227 * @since 4.0.0 228 * 229 * @global WP_Embed $wp_embed 230 * 231 * @param array $matches The RegEx matches from the provided regex when calling 232 * wp_embed_register_handler(). 233 * @param array $attr Embed attributes. 234 * @param string $url The original URL that was matched by the regex. 235 * @param array $rawattr The original unmodified attributes. 236 * @return string The embed HTML. 237 */ 238 function wp_embed_handler_youtube( $matches, $attr, $url, $rawattr ) { 239 global $wp_embed; 240 $embed = $wp_embed->autoembed( sprintf( 'https://youtube.com/watch?v=%s', urlencode( $matches[2] ) ) ); 241 242 /** 243 * Filters the YoutTube embed output. 244 * 245 * @since 4.0.0 246 * 247 * @see wp_embed_handler_youtube() 248 * 249 * @param string $embed YouTube embed output. 250 * @param array $attr An array of embed attributes. 251 * @param string $url The original URL that was matched by the regex. 252 * @param array $rawattr The original unmodified attributes. 253 */ 254 return apply_filters( 'wp_embed_handler_youtube', $embed, $attr, $url, $rawattr ); 255 } 256 257 /** 258 * Audio embed handler callback. 259 * 260 * @since 3.6.0 261 * 262 * @param array $matches The RegEx matches from the provided regex when calling wp_embed_register_handler(). 263 * @param array $attr Embed attributes. 264 * @param string $url The original URL that was matched by the regex. 265 * @param array $rawattr The original unmodified attributes. 266 * @return string The embed HTML. 267 */ 268 function wp_embed_handler_audio( $matches, $attr, $url, $rawattr ) { 269 $audio = sprintf( '[audio src="%s" /]', esc_url( $url ) ); 270 271 /** 272 * Filters the audio embed output. 273 * 274 * @since 3.6.0 275 * 276 * @param string $audio Audio embed output. 277 * @param array $attr An array of embed attributes. 278 * @param string $url The original URL that was matched by the regex. 279 * @param array $rawattr The original unmodified attributes. 280 */ 281 return apply_filters( 'wp_embed_handler_audio', $audio, $attr, $url, $rawattr ); 282 } 283 284 /** 285 * Video embed handler callback. 286 * 287 * @since 3.6.0 288 * 289 * @param array $matches The RegEx matches from the provided regex when calling wp_embed_register_handler(). 290 * @param array $attr Embed attributes. 291 * @param string $url The original URL that was matched by the regex. 292 * @param array $rawattr The original unmodified attributes. 293 * @return string The embed HTML. 294 */ 295 function wp_embed_handler_video( $matches, $attr, $url, $rawattr ) { 296 $dimensions = ''; 297 if ( ! empty( $rawattr['width'] ) && ! empty( $rawattr['height'] ) ) { 298 $dimensions .= sprintf( 'width="%d" ', (int) $rawattr['width'] ); 299 $dimensions .= sprintf( 'height="%d" ', (int) $rawattr['height'] ); 300 } 301 $video = sprintf( '[video %s src="%s" /]', $dimensions, esc_url( $url ) ); 302 303 /** 304 * Filters the video embed output. 305 * 306 * @since 3.6.0 307 * 308 * @param string $video Video embed output. 309 * @param array $attr An array of embed attributes. 310 * @param string $url The original URL that was matched by the regex. 311 * @param array $rawattr The original unmodified attributes. 312 */ 313 return apply_filters( 'wp_embed_handler_video', $video, $attr, $url, $rawattr ); 314 } 315 316 /** 317 * Registers the oEmbed REST API route. 318 * 319 * @since 4.4.0 320 */ 321 function wp_oembed_register_route() { 322 $controller = new WP_oEmbed_Controller(); 323 $controller->register_routes(); 324 } 325 326 /** 327 * Adds oEmbed discovery links in the website <head>. 328 * 329 * @since 4.4.0 330 */ 331 function wp_oembed_add_discovery_links() { 332 $output = ''; 333 334 if ( is_singular() ) { 335 $output .= '<link rel="alternate" type="application/json+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink() ) ) . '" />' . "\n"; 336 337 if ( class_exists( 'SimpleXMLElement' ) ) { 338 $output .= '<link rel="alternate" type="text/xml+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink(), 'xml' ) ) . '" />' . "\n"; 339 } 340 } 341 342 /** 343 * Filters the oEmbed discovery links HTML. 344 * 345 * @since 4.4.0 346 * 347 * @param string $output HTML of the discovery links. 348 */ 349 echo apply_filters( 'oembed_discovery_links', $output ); 350 } 351 352 /** 353 * Adds the necessary JavaScript to communicate with the embedded iframes. 354 * 355 * @since 4.4.0 356 */ 357 function wp_oembed_add_host_js() { 358 wp_enqueue_script( 'wp-embed' ); 359 } 360 361 /** 362 * Retrieves the URL to embed a specific post in an iframe. 363 * 364 * @since 4.4.0 365 * 366 * @param int|WP_Post $post Optional. Post ID or object. Defaults to the current post. 367 * @return string|false The post embed URL on success, false if the post doesn't exist. 368 */ 369 function get_post_embed_url( $post = null ) { 370 $post = get_post( $post ); 371 372 if ( ! $post ) { 373 return false; 374 } 375 376 $embed_url = trailingslashit( get_permalink( $post ) ) . user_trailingslashit( 'embed' ); 377 $path_conflict = get_page_by_path( str_replace( home_url(), '', $embed_url ), OBJECT, get_post_types( array( 'public' => true ) ) ); 378 379 if ( ! get_option( 'permalink_structure' ) || $path_conflict ) { 380 $embed_url = add_query_arg( array( 'embed' => 'true' ), get_permalink( $post ) ); 381 } 382 383 /** 384 * Filters the URL to embed a specific post. 385 * 386 * @since 4.4.0 387 * 388 * @param string $embed_url The post embed URL. 389 * @param WP_Post $post The corresponding post object. 390 */ 391 return esc_url_raw( apply_filters( 'post_embed_url', $embed_url, $post ) ); 392 } 393 394 /** 395 * Retrieves the oEmbed endpoint URL for a given permalink. 396 * 397 * Pass an empty string as the first argument to get the endpoint base URL. 398 * 399 * @since 4.4.0 400 * 401 * @param string $permalink Optional. The permalink used for the `url` query arg. Default empty. 402 * @param string $format Optional. The requested response format. Default 'json'. 403 * @return string The oEmbed endpoint URL. 404 */ 405 function get_oembed_endpoint_url( $permalink = '', $format = 'json' ) { 406 $url = rest_url( 'oembed/1.0/embed' ); 407 408 if ( '' !== $permalink ) { 409 $url = add_query_arg( 410 array( 411 'url' => urlencode( $permalink ), 412 'format' => ( 'json' !== $format ) ? $format : false, 413 ), 414 $url 415 ); 416 } 417 418 /** 419 * Filters the oEmbed endpoint URL. 420 * 421 * @since 4.4.0 422 * 423 * @param string $url The URL to the oEmbed endpoint. 424 * @param string $permalink The permalink used for the `url` query arg. 425 * @param string $format The requested response format. 426 */ 427 return apply_filters( 'oembed_endpoint_url', $url, $permalink, $format ); 428 } 429 430 /** 431 * Retrieves the embed code for a specific post. 432 * 433 * @since 4.4.0 434 * 435 * @param int $width The width for the response. 436 * @param int $height The height for the response. 437 * @param int|WP_Post $post Optional. Post ID or object. Default is global `$post`. 438 * @return string|false Embed code on success, false if post doesn't exist. 439 */ 440 function get_post_embed_html( $width, $height, $post = null ) { 441 $post = get_post( $post ); 442 443 if ( ! $post ) { 444 return false; 445 } 446 447 $embed_url = get_post_embed_url( $post ); 448 449 $output = '<blockquote class="wp-embedded-content"><a href="' . esc_url( get_permalink( $post ) ) . '">' . get_the_title( $post ) . "</a></blockquote>\n"; 450 451 $output .= "<script type='text/javascript'>\n"; 452 $output .= "<!--//--><![CDATA[//><!--\n"; 453 if ( SCRIPT_DEBUG ) { 454 $output .= file_get_contents( ABSPATH . WPINC . '/js/wp-embed.js' ); 455 } else { 456 /* 457 * If you're looking at a src version of this file, you'll see an "include" 458 * statement below. This is used by the `npm run build` process to directly 459 * include a minified version of wp-embed.js, instead of using the 460 * file_get_contents() method from above. 461 * 462 * If you're looking at a build version of this file, you'll see a string of 463 * minified JavaScript. If you need to debug it, please turn on SCRIPT_DEBUG 464 * and edit wp-embed.js directly. 465 */ 466 $output .= <<<JS 467 /*! This file is auto-generated */ 468 !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); 469 JS; 470 } 471 $output .= "\n//--><!]]>"; 472 $output .= "\n</script>"; 473 474 $output .= sprintf( 475 '<iframe sandbox="allow-scripts" security="restricted" src="%1$s" width="%2$d" height="%3$d" title="%4$s" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe>', 476 esc_url( $embed_url ), 477 absint( $width ), 478 absint( $height ), 479 esc_attr( 480 sprintf( 481 /* translators: 1: Post title, 2: Site title. */ 482 __( '“%1$s” — %2$s' ), 483 get_the_title( $post ), 484 get_bloginfo( 'name' ) 485 ) 486 ) 487 ); 488 489 /** 490 * Filters the embed HTML output for a given post. 491 * 492 * @since 4.4.0 493 * 494 * @param string $output The default iframe tag to display embedded content. 495 * @param WP_Post $post Current post object. 496 * @param int $width Width of the response. 497 * @param int $height Height of the response. 498 */ 499 return apply_filters( 'embed_html', $output, $post, $width, $height ); 500 } 501 502 /** 503 * Retrieves the oEmbed response data for a given post. 504 * 505 * @since 4.4.0 506 * 507 * @param WP_Post|int $post Post object or ID. 508 * @param int $width The requested width. 509 * @return array|false Response data on success, false if post doesn't exist. 510 */ 511 function get_oembed_response_data( $post, $width ) { 512 $post = get_post( $post ); 513 $width = absint( $width ); 514 515 if ( ! $post ) { 516 return false; 517 } 518 519 if ( 'publish' !== get_post_status( $post ) ) { 520 return false; 521 } 522 523 /** 524 * Filters the allowed minimum and maximum widths for the oEmbed response. 525 * 526 * @since 4.4.0 527 * 528 * @param array $min_max_width { 529 * Minimum and maximum widths for the oEmbed response. 530 * 531 * @type int $min Minimum width. Default 200. 532 * @type int $max Maximum width. Default 600. 533 * } 534 */ 535 $min_max_width = apply_filters( 536 'oembed_min_max_width', 537 array( 538 'min' => 200, 539 'max' => 600, 540 ) 541 ); 542 543 $width = min( max( $min_max_width['min'], $width ), $min_max_width['max'] ); 544 $height = max( ceil( $width / 16 * 9 ), 200 ); 545 546 $data = array( 547 'version' => '1.0', 548 'provider_name' => get_bloginfo( 'name' ), 549 'provider_url' => get_home_url(), 550 'author_name' => get_bloginfo( 'name' ), 551 'author_url' => get_home_url(), 552 'title' => get_the_title( $post ), 553 'type' => 'link', 554 ); 555 556 $author = get_userdata( $post->post_author ); 557 558 if ( $author ) { 559 $data['author_name'] = $author->display_name; 560 $data['author_url'] = get_author_posts_url( $author->ID ); 561 } 562 563 /** 564 * Filters the oEmbed response data. 565 * 566 * @since 4.4.0 567 * 568 * @param array $data The response data. 569 * @param WP_Post $post The post object. 570 * @param int $width The requested width. 571 * @param int $height The calculated height. 572 */ 573 return apply_filters( 'oembed_response_data', $data, $post, $width, $height ); 574 } 575 576 577 /** 578 * Retrieves the oEmbed response data for a given URL. 579 * 580 * @since 5.0.0 581 * 582 * @param string $url The URL that should be inspected for discovery `<link>` tags. 583 * @param array $args oEmbed remote get arguments. 584 * @return object|false oEmbed response data if the URL does belong to the current site. False otherwise. 585 */ 586 function get_oembed_response_data_for_url( $url, $args ) { 587 $switched_blog = false; 588 589 if ( is_multisite() ) { 590 $url_parts = wp_parse_args( 591 wp_parse_url( $url ), 592 array( 593 'host' => '', 594 'path' => '/', 595 ) 596 ); 597 598 $qv = array( 599 'domain' => $url_parts['host'], 600 'path' => '/', 601 'update_site_meta_cache' => false, 602 ); 603 604 // In case of subdirectory configs, set the path. 605 if ( ! is_subdomain_install() ) { 606 $path = explode( '/', ltrim( $url_parts['path'], '/' ) ); 607 $path = reset( $path ); 608 609 if ( $path ) { 610 $qv['path'] = get_network()->path . $path . '/'; 611 } 612 } 613 614 $sites = get_sites( $qv ); 615 $site = reset( $sites ); 616 617 if ( $site && (int) $site->blog_id !== get_current_blog_id() ) { 618 switch_to_blog( $site->blog_id ); 619 $switched_blog = true; 620 } 621 } 622 623 $post_id = url_to_postid( $url ); 624 625 /** This filter is documented in wp-includes/class-wp-oembed-controller.php */ 626 $post_id = apply_filters( 'oembed_request_post_id', $post_id, $url ); 627 628 if ( ! $post_id ) { 629 if ( $switched_blog ) { 630 restore_current_blog(); 631 } 632 633 return false; 634 } 635 636 $width = isset( $args['width'] ) ? $args['width'] : 0; 637 638 $data = get_oembed_response_data( $post_id, $width ); 639 640 if ( $switched_blog ) { 641 restore_current_blog(); 642 } 643 644 return $data ? (object) $data : false; 645 } 646 647 648 /** 649 * Filters the oEmbed response data to return an iframe embed code. 650 * 651 * @since 4.4.0 652 * 653 * @param array $data The response data. 654 * @param WP_Post $post The post object. 655 * @param int $width The requested width. 656 * @param int $height The calculated height. 657 * @return array The modified response data. 658 */ 659 function get_oembed_response_data_rich( $data, $post, $width, $height ) { 660 $data['width'] = absint( $width ); 661 $data['height'] = absint( $height ); 662 $data['type'] = 'rich'; 663 $data['html'] = get_post_embed_html( $width, $height, $post ); 664 665 // Add post thumbnail to response if available. 666 $thumbnail_id = false; 667 668 if ( has_post_thumbnail( $post->ID ) ) { 669 $thumbnail_id = get_post_thumbnail_id( $post->ID ); 670 } 671 672 if ( 'attachment' === get_post_type( $post ) ) { 673 if ( wp_attachment_is_image( $post ) ) { 674 $thumbnail_id = $post->ID; 675 } elseif ( wp_attachment_is( 'video', $post ) ) { 676 $thumbnail_id = get_post_thumbnail_id( $post ); 677 $data['type'] = 'video'; 678 } 679 } 680 681 if ( $thumbnail_id ) { 682 list( $thumbnail_url, $thumbnail_width, $thumbnail_height ) = wp_get_attachment_image_src( $thumbnail_id, array( $width, 99999 ) ); 683 $data['thumbnail_url'] = $thumbnail_url; 684 $data['thumbnail_width'] = $thumbnail_width; 685 $data['thumbnail_height'] = $thumbnail_height; 686 } 687 688 return $data; 689 } 690 691 /** 692 * Ensures that the specified format is either 'json' or 'xml'. 693 * 694 * @since 4.4.0 695 * 696 * @param string $format The oEmbed response format. Accepts 'json' or 'xml'. 697 * @return string The format, either 'xml' or 'json'. Default 'json'. 698 */ 699 function wp_oembed_ensure_format( $format ) { 700 if ( ! in_array( $format, array( 'json', 'xml' ), true ) ) { 701 return 'json'; 702 } 703 704 return $format; 705 } 706 707 /** 708 * Hooks into the REST API output to print XML instead of JSON. 709 * 710 * This is only done for the oEmbed API endpoint, 711 * which supports both formats. 712 * 713 * @access private 714 * @since 4.4.0 715 * 716 * @param bool $served Whether the request has already been served. 717 * @param WP_HTTP_ResponseInterface $result Result to send to the client. Usually a WP_REST_Response. 718 * @param WP_REST_Request $request Request used to generate the response. 719 * @param WP_REST_Server $server Server instance. 720 * @return true 721 */ 722 function _oembed_rest_pre_serve_request( $served, $result, $request, $server ) { 723 $params = $request->get_params(); 724 725 if ( '/oembed/1.0/embed' !== $request->get_route() || 'GET' !== $request->get_method() ) { 726 return $served; 727 } 728 729 if ( ! isset( $params['format'] ) || 'xml' !== $params['format'] ) { 730 return $served; 731 } 732 733 // Embed links inside the request. 734 $data = $server->response_to_data( $result, false ); 735 736 if ( ! class_exists( 'SimpleXMLElement' ) ) { 737 status_header( 501 ); 738 die( get_status_header_desc( 501 ) ); 739 } 740 741 $result = _oembed_create_xml( $data ); 742 743 // Bail if there's no XML. 744 if ( ! $result ) { 745 status_header( 501 ); 746 return get_status_header_desc( 501 ); 747 } 748 749 if ( ! headers_sent() ) { 750 $server->send_header( 'Content-Type', 'text/xml; charset=' . get_option( 'blog_charset' ) ); 751 } 752 753 echo $result; 754 755 return true; 756 } 757 758 /** 759 * Creates an XML string from a given array. 760 * 761 * @since 4.4.0 762 * @access private 763 * 764 * @param array $data The original oEmbed response data. 765 * @param SimpleXMLElement $node Optional. XML node to append the result to recursively. 766 * @return string|false XML string on success, false on error. 767 */ 768 function _oembed_create_xml( $data, $node = null ) { 769 if ( ! is_array( $data ) || empty( $data ) ) { 770 return false; 771 } 772 773 if ( null === $node ) { 774 $node = new SimpleXMLElement( '<oembed></oembed>' ); 775 } 776 777 foreach ( $data as $key => $value ) { 778 if ( is_numeric( $key ) ) { 779 $key = 'oembed'; 780 } 781 782 if ( is_array( $value ) ) { 783 $item = $node->addChild( $key ); 784 _oembed_create_xml( $value, $item ); 785 } else { 786 $node->addChild( $key, esc_html( $value ) ); 787 } 788 } 789 790 return $node->asXML(); 791 } 792 793 /** 794 * Filters the given oEmbed HTML to make sure iframes have a title attribute. 795 * 796 * @since 5.2.0 797 * 798 * @param string $result The oEmbed HTML result. 799 * @param object $data A data object result from an oEmbed provider. 800 * @param string $url The URL of the content to be embedded. 801 * @return string The filtered oEmbed result. 802 */ 803 function wp_filter_oembed_iframe_title_attribute( $result, $data, $url ) { 804 if ( false === $result || ! in_array( $data->type, array( 'rich', 'video' ) ) ) { 805 return $result; 806 } 807 808 $title = ! empty( $data->title ) ? $data->title : ''; 809 810 $pattern = '`<iframe[^>]*?title=(\\\\\'|\\\\"|[\'"])([^>]*?)\1`i'; 811 $has_title_attr = preg_match( $pattern, $result, $matches ); 812 813 if ( $has_title_attr && ! empty( $matches[2] ) ) { 814 $title = $matches[2]; 815 } 816 817 /** 818 * Filters the title attribute of the given oEmbed HTML iframe. 819 * 820 * @since 5.2.0 821 * 822 * @param string $title The title attribute. 823 * @param string $result The oEmbed HTML result. 824 * @param object $data A data object result from an oEmbed provider. 825 * @param string $url The URL of the content to be embedded. 826 */ 827 $title = apply_filters( 'oembed_iframe_title_attribute', $title, $result, $data, $url ); 828 829 if ( '' === $title ) { 830 return $result; 831 } 832 833 if ( $has_title_attr ) { 834 // Remove the old title, $matches[1]: quote, $matches[2]: title attribute value. 835 $result = str_replace( ' title=' . $matches[1] . $matches[2] . $matches[1], '', $result ); 836 } 837 838 return str_ireplace( '<iframe ', sprintf( '<iframe title="%s" ', esc_attr( $title ) ), $result ); 839 } 840 841 842 /** 843 * Filters the given oEmbed HTML. 844 * 845 * If the `$url` isn't on the trusted providers list, 846 * we need to filter the HTML heavily for security. 847 * 848 * Only filters 'rich' and 'video' response types. 849 * 850 * @since 4.4.0 851 * 852 * @param string $result The oEmbed HTML result. 853 * @param object $data A data object result from an oEmbed provider. 854 * @param string $url The URL of the content to be embedded. 855 * @return string The filtered and sanitized oEmbed result. 856 */ 857 function wp_filter_oembed_result( $result, $data, $url ) { 858 if ( false === $result || ! in_array( $data->type, array( 'rich', 'video' ) ) ) { 859 return $result; 860 } 861 862 $wp_oembed = _wp_oembed_get_object(); 863 864 // Don't modify the HTML for trusted providers. 865 if ( false !== $wp_oembed->get_provider( $url, array( 'discover' => false ) ) ) { 866 return $result; 867 } 868 869 $allowed_html = array( 870 'a' => array( 871 'href' => true, 872 ), 873 'blockquote' => array(), 874 'iframe' => array( 875 'src' => true, 876 'width' => true, 877 'height' => true, 878 'frameborder' => true, 879 'marginwidth' => true, 880 'marginheight' => true, 881 'scrolling' => true, 882 'title' => true, 883 ), 884 ); 885 886 $html = wp_kses( $result, $allowed_html ); 887 888 preg_match( '|(<blockquote>.*?</blockquote>)?.*(<iframe.*?></iframe>)|ms', $html, $content ); 889 // We require at least the iframe to exist. 890 if ( empty( $content[2] ) ) { 891 return false; 892 } 893 $html = $content[1] . $content[2]; 894 895 preg_match( '/ src=([\'"])(.*?)\1/', $html, $results ); 896 897 if ( ! empty( $results ) ) { 898 $secret = wp_generate_password( 10, false ); 899 900 $url = esc_url( "{$results[2]}#?secret=$secret" ); 901 $q = $results[1]; 902 903 $html = str_replace( $results[0], ' src=' . $q . $url . $q . ' data-secret=' . $q . $secret . $q, $html ); 904 $html = str_replace( '<blockquote', "<blockquote data-secret=\"$secret\"", $html ); 905 } 906 907 $allowed_html['blockquote']['data-secret'] = true; 908 $allowed_html['iframe']['data-secret'] = true; 909 910 $html = wp_kses( $html, $allowed_html ); 911 912 if ( ! empty( $content[1] ) ) { 913 // We have a blockquote to fall back on. Hide the iframe by default. 914 $html = str_replace( '<iframe', '<iframe style="position: absolute; clip: rect(1px, 1px, 1px, 1px);"', $html ); 915 $html = str_replace( '<blockquote', '<blockquote class="wp-embedded-content"', $html ); 916 } 917 918 $html = str_ireplace( '<iframe', '<iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted"', $html ); 919 920 return $html; 921 } 922 923 /** 924 * Filters the string in the 'more' link displayed after a trimmed excerpt. 925 * 926 * Replaces '[...]' (appended to automatically generated excerpts) with an 927 * ellipsis and a "Continue reading" link in the embed template. 928 * 929 * @since 4.4.0 930 * 931 * @param string $more_string Default 'more' string. 932 * @return string 'Continue reading' link prepended with an ellipsis. 933 */ 934 function wp_embed_excerpt_more( $more_string ) { 935 if ( ! is_embed() ) { 936 return $more_string; 937 } 938 939 $link = sprintf( 940 '<a href="%1$s" class="wp-embed-more" target="_top">%2$s</a>', 941 esc_url( get_permalink() ), 942 /* translators: %s: Post title. */ 943 sprintf( __( 'Continue reading %s' ), '<span class="screen-reader-text">' . get_the_title() . '</span>' ) 944 ); 945 return ' … ' . $link; 946 } 947 948 /** 949 * Displays the post excerpt for the embed template. 950 * 951 * Intended to be used in 'The Loop'. 952 * 953 * @since 4.4.0 954 */ 955 function the_excerpt_embed() { 956 $output = get_the_excerpt(); 957 958 /** 959 * Filters the post excerpt for the embed template. 960 * 961 * @since 4.4.0 962 * 963 * @param string $output The current post excerpt. 964 */ 965 echo apply_filters( 'the_excerpt_embed', $output ); 966 } 967 968 /** 969 * Filters the post excerpt for the embed template. 970 * 971 * Shows players for video and audio attachments. 972 * 973 * @since 4.4.0 974 * 975 * @param string $content The current post excerpt. 976 * @return string The modified post excerpt. 977 */ 978 function wp_embed_excerpt_attachment( $content ) { 979 if ( is_attachment() ) { 980 return prepend_attachment( '' ); 981 } 982 983 return $content; 984 } 985 986 /** 987 * Enqueue embed iframe default CSS and JS & fire do_action('enqueue_embed_scripts') 988 * 989 * Enqueue PNG fallback CSS for embed iframe for legacy versions of IE. 990 * 991 * Allows plugins to queue scripts for the embed iframe end using wp_enqueue_script(). 992 * Runs first in oembed_head(). 993 * 994 * @since 4.4.0 995 */ 996 function enqueue_embed_scripts() { 997 wp_enqueue_style( 'wp-embed-template-ie' ); 998 999 /** 1000 * Fires when scripts and styles are enqueued for the embed iframe. 1001 * 1002 * @since 4.4.0 1003 */ 1004 do_action( 'enqueue_embed_scripts' ); 1005 } 1006 1007 /** 1008 * Prints the CSS in the embed iframe header. 1009 * 1010 * @since 4.4.0 1011 */ 1012 function print_embed_styles() { 1013 $type_attr = current_theme_supports( 'html5', 'style' ) ? '' : ' type="text/css"'; 1014 ?> 1015 <style<?php echo $type_attr; ?>> 1016 <?php 1017 if ( SCRIPT_DEBUG ) { 1018 readfile( ABSPATH . WPINC . '/css/wp-embed-template.css' ); 1019 } else { 1020 /* 1021 * If you're looking at a src version of this file, you'll see an "include" 1022 * statement below. This is used by the `npm run build` process to directly 1023 * include a minified version of wp-oembed-embed.css, instead of using the 1024 * readfile() method from above. 1025 * 1026 * If you're looking at a build version of this file, you'll see a string of 1027 * minified CSS. If you need to debug it, please turn on SCRIPT_DEBUG 1028 * and edit wp-embed-template.css directly. 1029 */ 1030 ?> 1031 /*! 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0;padding:0 11px 0 0;border-left:none;border-right:1px solid #aaa} 1033 <?php 1034 } 1035 ?> 1036 </style> 1037 <?php 1038 } 1039 1040 /** 1041 * Prints the JavaScript in the embed iframe header. 1042 * 1043 * @since 4.4.0 1044 */ 1045 function print_embed_scripts() { 1046 $type_attr = current_theme_supports( 'html5', 'script' ) ? '' : ' type="text/javascript"'; 1047 ?> 1048 <script<?php echo $type_attr; ?>> 1049 <?php 1050 if ( SCRIPT_DEBUG ) { 1051 readfile( ABSPATH . WPINC . '/js/wp-embed-template.js' ); 1052 } else { 1053 /* 1054 * If you're looking at a src version of this file, you'll see an "include" 1055 * statement below. This is used by the `npm run build` process to directly 1056 * include a minified version of wp-embed-template.js, instead of using the 1057 * readfile() method from above. 1058 * 1059 * If you're looking at a build version of this file, you'll see a string of 1060 * minified JavaScript. If you need to debug it, please turn on SCRIPT_DEBUG 1061 * and edit wp-embed-template.js directly. 1062 */ 1063 ?> 1064 /*! This file is auto-generated */ 1065 !function(u,c){"use strict";var r,t,e,i=c.querySelector&&u.addEventListener,b=!1;function f(e,t){u.parent.postMessage({message:e,value:t,secret:r},"*")}function n(){if(!b){b=!0;var e,t=c.querySelector(".wp-embed-share-dialog"),r=c.querySelector(".wp-embed-share-dialog-open"),i=c.querySelector(".wp-embed-share-dialog-close"),n=c.querySelectorAll(".wp-embed-share-input"),a=c.querySelectorAll(".wp-embed-share-tab-button button"),o=c.querySelector(".wp-embed-featured-image img");if(n)for(e=0;e<n.length;e++)n[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()}),i&&i.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"]');i!==e.target||e.shiftKey?t===e.target&&e.shiftKey&&(i.focus(),e.preventDefault()):(t.focus(),e.preventDefault())}(e)},!1),u.self!==u.top&&(f("height",Math.ceil(c.body.getBoundingClientRect().height)),o&&o.addEventListener("load",function(){f("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"))&&(f("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,i=e.target,n=i.parentElement.previousElementSibling,a=i.parentElement.nextElementSibling;if(37===e.keyCode)t=n;else{if(39!==e.keyCode)return!1;t=a}"rtl"===c.documentElement.getAttribute("dir")&&(t=t===n?a:n),t&&(r=t.firstElementChild,i.setAttribute("tabindex","-1"),i.setAttribute("aria-selected",!1),c.querySelector("#"+i.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"))}}i&&(!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",n,!1),u.addEventListener("load",n,!1),u.addEventListener("resize",function(){u.self!==u.top&&(clearTimeout(e),e=setTimeout(function(){f("height",Math.ceil(c.body.getBoundingClientRect().height))},100))},!1))}(window,document); 1066 <?php 1067 } 1068 ?> 1069 </script> 1070 <?php 1071 } 1072 1073 /** 1074 * Prepare the oembed HTML to be displayed in an RSS feed. 1075 * 1076 * @since 4.4.0 1077 * @access private 1078 * 1079 * @param string $content The content to filter. 1080 * @return string The filtered content. 1081 */ 1082 function _oembed_filter_feed_content( $content ) { 1083 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 ); 1084 } 1085 1086 /** 1087 * Prints the necessary markup for the embed comments button. 1088 * 1089 * @since 4.4.0 1090 */ 1091 function print_embed_comments_button() { 1092 if ( is_404() || ! ( get_comments_number() || comments_open() ) ) { 1093 return; 1094 } 1095 ?> 1096 <div class="wp-embed-comments"> 1097 <a href="<?php comments_link(); ?>" target="_top"> 1098 <span class="dashicons dashicons-admin-comments"></span> 1099 <?php 1100 printf( 1101 /* translators: %s: Number of comments. */ 1102 _n( 1103 '%s <span class="screen-reader-text">Comment</span>', 1104 '%s <span class="screen-reader-text">Comments</span>', 1105 get_comments_number() 1106 ), 1107 number_format_i18n( get_comments_number() ) 1108 ); 1109 ?> 1110 </a> 1111 </div> 1112 <?php 1113 } 1114 1115 /** 1116 * Prints the necessary markup for the embed sharing button. 1117 * 1118 * @since 4.4.0 1119 */ 1120 function print_embed_sharing_button() { 1121 if ( is_404() ) { 1122 return; 1123 } 1124 ?> 1125 <div class="wp-embed-share"> 1126 <button type="button" class="wp-embed-share-dialog-open" aria-label="<?php esc_attr_e( 'Open sharing dialog' ); ?>"> 1127 <span class="dashicons dashicons-share"></span> 1128 </button> 1129 </div> 1130 <?php 1131 } 1132 1133 /** 1134 * Prints the necessary markup for the embed sharing dialog. 1135 * 1136 * @since 4.4.0 1137 */ 1138 function print_embed_sharing_dialog() { 1139 if ( is_404() ) { 1140 return; 1141 } 1142 ?> 1143 <div class="wp-embed-share-dialog hidden" role="dialog" aria-label="<?php esc_attr_e( 'Sharing options' ); ?>"> 1144 <div class="wp-embed-share-dialog-content"> 1145 <div class="wp-embed-share-dialog-text"> 1146 <ul class="wp-embed-share-tabs" role="tablist"> 1147 <li class="wp-embed-share-tab-button wp-embed-share-tab-button-wordpress" role="presentation"> 1148 <button type="button" role="tab" aria-controls="wp-embed-share-tab-wordpress" aria-selected="true" tabindex="0"><?php esc_html_e( 'WordPress Embed' ); ?></button> 1149 </li> 1150 <li class="wp-embed-share-tab-button wp-embed-share-tab-button-html" role="presentation"> 1151 <button type="button" role="tab" aria-controls="wp-embed-share-tab-html" aria-selected="false" tabindex="-1"><?php esc_html_e( 'HTML Embed' ); ?></button> 1152 </li> 1153 </ul> 1154 <div id="wp-embed-share-tab-wordpress" class="wp-embed-share-tab" role="tabpanel" aria-hidden="false"> 1155 <input type="text" value="<?php the_permalink(); ?>" class="wp-embed-share-input" aria-describedby="wp-embed-share-description-wordpress" tabindex="0" readonly/> 1156 1157 <p class="wp-embed-share-description" id="wp-embed-share-description-wordpress"> 1158 <?php _e( 'Copy and paste this URL into your WordPress site to embed' ); ?> 1159 </p> 1160 </div> 1161 <div id="wp-embed-share-tab-html" class="wp-embed-share-tab" role="tabpanel" aria-hidden="true"> 1162 <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> 1163 1164 <p class="wp-embed-share-description" id="wp-embed-share-description-html"> 1165 <?php _e( 'Copy and paste this code into your site to embed' ); ?> 1166 </p> 1167 </div> 1168 </div> 1169 1170 <button type="button" class="wp-embed-share-dialog-close" aria-label="<?php esc_attr_e( 'Close sharing dialog' ); ?>"> 1171 <span class="dashicons dashicons-no"></span> 1172 </button> 1173 </div> 1174 </div> 1175 <?php 1176 } 1177 1178 /** 1179 * Prints the necessary markup for the site title in an embed template. 1180 * 1181 * @since 4.5.0 1182 */ 1183 function the_embed_site_title() { 1184 $site_title = sprintf( 1185 '<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>', 1186 esc_url( home_url() ), 1187 esc_url( get_site_icon_url( 32, admin_url( 'images/w-logo-blue.png' ) ) ), 1188 esc_url( get_site_icon_url( 64, admin_url( 'images/w-logo-blue.png' ) ) ), 1189 esc_html( get_bloginfo( 'name' ) ) 1190 ); 1191 1192 $site_title = '<div class="wp-embed-site-title">' . $site_title . '</div>'; 1193 1194 /** 1195 * Filters the site title HTML in the embed footer. 1196 * 1197 * @since 4.4.0 1198 * 1199 * @param string $site_title The site title HTML. 1200 */ 1201 echo apply_filters( 'embed_site_title_html', $site_title ); 1202 } 1203 1204 /** 1205 * Filters the oEmbed result before any HTTP requests are made. 1206 * 1207 * If the URL belongs to the current site, the result is fetched directly instead of 1208 * going through the oEmbed discovery process. 1209 * 1210 * @since 4.5.3 1211 * 1212 * @param null|string $result The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. Default null. 1213 * @param string $url The URL that should be inspected for discovery `<link>` tags. 1214 * @param array $args oEmbed remote get arguments. 1215 * @return null|string The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. 1216 * Null if the URL does not belong to the current site. 1217 */ 1218 function wp_filter_pre_oembed_result( $result, $url, $args ) { 1219 $data = get_oembed_response_data_for_url( $url, $args ); 1220 1221 if ( $data ) { 1222 return _wp_oembed_get_object()->data2html( $data, $url ); 1223 } 1224 1225 return $result; 1226 }
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| Generated: Sat Jan 25 01:00:03 2020 | Cross-referenced by PHPXref 0.7.1 |