wp-includes/class-oembed.php

   1 <?php
   2 /**
   3  * API for fetching the HTML to embed remote content based on a provided URL.
   4  * Used internally by the {@link WP_Embed} class, but is designed to be generic.
   5  *
   6  * @link http://codex.wordpress.org/oEmbed oEmbed Codex Article
   7  * @link http://oembed.com/ oEmbed Homepage
   8  *
   9  * @package WordPress
  10  * @subpackage oEmbed
  11  */
  12
  13 /**
  14  * oEmbed class.
  15  *
  16  * @package WordPress
  17  * @subpackage oEmbed
  18  * @since 2.9.0
  19  */
  20 class WP_oEmbed {
  21         public $providers = array();
  22         public static $early_providers = array();
  23
  24         /**
  25          * Constructor
  26          *
  27          * @since 2.9.0
  28          */
  29         public function __construct() {
  30                 $providers = array(
  31                         '#http://(www\.)?youtube\.com/watch.*#i'              => array( 'http://www.youtube.com/oembed',                      true  ),
  32                         '#https://(www\.)?youtube\.com/watch.*#i'             => array( 'http://www.youtube.com/oembed?scheme=https',         true  ),
  33                         '#http://(www\.)?youtube\.com/playlist.*#i'           => array( 'http://www.youtube.com/oembed',                      true  ),
  34                         '#https://(www\.)?youtube\.com/playlist.*#i'          => array( 'http://www.youtube.com/oembed?scheme=https',         true  ),
  35                         '#http://youtu\.be/.*#i'                              => array( 'http://www.youtube.com/oembed',                      true  ),
  36                         '#https://youtu\.be/.*#i'                             => array( 'http://www.youtube.com/oembed?scheme=https',         true  ),
  37                         'http://blip.tv/*'                                    => array( 'http://blip.tv/oembed/',                             false ),
  38                         '#https?://(.+\.)?vimeo\.com/.*#i'                    => array( 'http://vimeo.com/api/oembed.{format}',               true  ),
  39                         '#https?://(www\.)?dailymotion\.com/.*#i'             => array( 'http://www.dailymotion.com/services/oembed',         true  ),
  40                         'http://dai.ly/*'                                     => array( 'http://www.dailymotion.com/services/oembed',         false ),
  41                         '#https?://(www\.)?flickr\.com/.*#i'                  => array( 'https://www.flickr.com/services/oembed/',            true  ),
  42                         '#https?://flic\.kr/.*#i'                             => array( 'https://www.flickr.com/services/oembed/',            true  ),
  43                         '#https?://(.+\.)?smugmug\.com/.*#i'                  => array( 'http://api.smugmug.com/services/oembed/',            true  ),
  44                         '#https?://(www\.)?hulu\.com/watch/.*#i'              => array( 'http://www.hulu.com/api/oembed.{format}',            true  ),
  45                         'http://revision3.com/*'                              => array( 'http://revision3.com/api/oembed/',                   false ),
  46                         'http://i*.photobucket.com/albums/*'                  => array( 'http://photobucket.com/oembed',                      false ),
  47                         'http://gi*.photobucket.com/groups/*'                 => array( 'http://photobucket.com/oembed',                      false ),
  48                         '#https?://(www\.)?scribd\.com/doc/.*#i'              => array( 'http://www.scribd.com/services/oembed',              true  ),
  49                         '#https?://wordpress.tv/.*#i'                         => array( 'http://wordpress.tv/oembed/',                        true ),
  50                         '#https?://(.+\.)?polldaddy\.com/.*#i'                => array( 'https://polldaddy.com/oembed/',                      true  ),
  51                         '#https?://poll\.fm/.*#i'                             => array( 'https://polldaddy.com/oembed/',                      true  ),
  52                         '#https?://(www\.)?funnyordie\.com/videos/.*#i'       => array( 'http://www.funnyordie.com/oembed',                   true  ),
  53                         '#https?://(www\.)?twitter\.com/.+?/status(es)?/.*#i' => array( 'https://api.twitter.com/1/statuses/oembed.{format}', true  ),
  54                         '#https?://(www\.)?soundcloud\.com/.*#i'              => array( 'http://soundcloud.com/oembed',                       true  ),
  55                         '#https?://(www\.)?slideshare\.net/.*#i'              => array( 'https://www.slideshare.net/api/oembed/2',            true  ),
  56                         '#http://instagr(\.am|am\.com)/p/.*#i'                => array( 'http://api.instagram.com/oembed',                    true  ),
  57                         '#https?://(www\.)?rdio\.com/.*#i'                    => array( 'http://www.rdio.com/api/oembed/',                    true  ),
  58                         '#https?://rd\.io/x/.*#i'                             => array( 'http://www.rdio.com/api/oembed/',                    true  ),
  59                         '#https?://(open|play)\.spotify\.com/.*#i'            => array( 'https://embed.spotify.com/oembed/',                  true  ),
  60                         '#https?://(.+\.)?imgur\.com/.*#i'                    => array( 'http://api.imgur.com/oembed',                        true  ),
  61                         '#https?://(www\.)?meetu(\.ps|p\.com)/.*#i'           => array( 'http://api.meetup.com/oembed',                       true  ),
  62                         '#https?://(www\.)?issuu\.com/.+/docs/.+#i'           => array( 'http://issuu.com/oembed_wp',                         true  ),
  63                         '#https?://(www\.)?collegehumor\.com/video/.*#i'      => array( 'http://www.collegehumor.com/oembed.{format}',        true  ),
  64                         '#https?://(www\.)?mixcloud\.com/.*#i'                => array( 'http://www.mixcloud.com/oembed',                     true  ),
  65                         '#https?://(www\.|embed\.)?ted\.com/talks/.*#i'       => array( 'http://www.ted.com/talks/oembed.{format}',           true  ),
  66                         '#https?://(www\.)?(animoto|video214)\.com/play/.*#i' => array( 'http://animoto.com/oembeds/create',                  true  ),
  67                 );
  68
  69                 if ( ! empty( self::$early_providers['add'] ) ) {
  70                         foreach ( self::$early_providers['add'] as $format => $data ) {
  71                                 $providers[ $format ] = $data;
  72                         }
  73                 }
  74
  75                 if ( ! empty( self::$early_providers['remove'] ) ) {
  76                         foreach ( self::$early_providers['remove'] as $format ) {
  77                                 unset( $providers[ $format ] );
  78                         }
  79                 }
  80
  81                 self::$early_providers = array();
  82
  83                 /**
  84                  * Filter the list of oEmbed providers.
  85                  *
  86                  * Discovery is disabled for users lacking the unfiltered_html capability.
  87                  * Only providers in this array will be used for those users.
  88                  *
  89                  * Supported providers:
  90                  *
  91                  * | ------------ | -------------------- | ----- | --------- |
  92                  * |   Provider   |        Flavor        |  SSL  |   Since   |
  93                  * | ------------ | -------------------- | ----- | --------- |
  94                  * | Blip         | blip.tv              |       | 2.9.0     |
  95                  * | Dailymotion  | dailymotion.com      |  Yes  | 2.9.0     |
  96                  * | Flickr       | flickr.com           |  Yes  | 2.9.0     |
  97                  * | Hulu         | hulu.com             |  Yes  | 2.9.0     |
  98                  * | Photobucket  | photobucket.com      |       | 2.9.0     |
  99                  * | Revision3    | revision3.com        |       | 2.9.0     |
 100                  * | Scribd       | scribd.com           |  Yes  | 2.9.0     |
 101                  * | Vimeo        | vimeo.com            |  Yes  | 2.9.0     |
 102                  * | WordPress.tv | wordpress.tv         |  Yes  | 2.9.0     |
 103                  * | YouTube      | youtube.com/watch    |  Yes  | 2.9.0     |
 104                  * | ------------ | -------------------- | ----- | --------- |
 105                  * | Funny or Die | funnyordie.com       |  Yes  | 3.0.0     |
 106                  * | Polldaddy    | polldaddy.com        |  Yes  | 3.0.0     |
 107                  * | SmugMug      | smugmug.com          |  Yes  | 3.0.0     |
 108                  * | YouTube      | youtu.be             |  Yes  | 3.0.0     |
 109                  * | ------------ | -------------------- | ----- | --------- |
 110                  * | Twitter      | twitter.com          |  Yes  | 3.4.0     |
 111                  * | ------------ | -------------------- | ----- | --------- |
 112                  * | Instagram    | instagram.com        |       | 3.5.0     |
 113                  * | Instagram    | instagr.am           |       | 3.5.0     |
 114                  * | Slideshare   | slideshare.net       |  Yes  | 3.5.0     |
 115                  * | SoundCloud   | soundcloud.com       |  Yes  | 3.5.0     |
 116                  * | ------------ | -------------------- | ----- | --------- |
 117                  * | Dailymotion  | dai.ly               |       | 3.6.0     |
 118                  * | Flickr       | flic.kr              |  Yes  | 3.6.0     |
 119                  * | Rdio         | rdio.com             |  Yes  | 3.6.0     |
 120                  * | Rdio         | rd.io                |  Yes  | 3.6.0     |
 121                  * | Spotify      | spotify.com          |  Yes  | 3.6.0     |
 122                  * | ------------ | -------------------- | ----- | --------- |
 123                  * | Imgur        | imgur.com            |  Yes  | 3.9.0     |
 124                  * | Meetup.com   | meetup.com           |  Yes  | 3.9.0     |
 125                  * | Meetup.com   | meetu.ps             |  Yes  | 3.9.0     |
 126                  * | ------------ | -------------------- | ----- | --------- |
 127                  * | Animoto      | animoto.com          |  Yes  | 4.0.0     |
 128                  * | Animoto      | video214.com         |  Yes  | 4.0.0     |
 129                  * | CollegeHumor | collegehumor.com     |  Yes  | 4.0.0     |
 130                  * | Issuu        | issuu.com            |  Yes  | 4.0.0     |
 131                  * | Mixcloud     | mixcloud.com         |  Yes  | 4.0.0     |
 132                  * | Polldaddy    | poll.fm              |  Yes  | 4.0.0     |
 133                  * | TED          | ted.com              |  Yes  | 4.0.0     |
 134                  * | YouTube      | youtube.com/playlist |  Yes  | 4.0.0     |
 135                  * | ------------ | -------------------- | ----- | --------- |
 136                  *
 137                  * No longer supported providers:
 138                  *
 139                  * | ------------ | -------------------- | ----- | --------- | --------- |
 140                  * |   Provider   |        Flavor        |  SSL  |   Since   |  Removed  |
 141                  * | ------------ | -------------------- | ----- | --------- | --------- |
 142                  * | Qik          | qik.com              |  Yes  | 2.9.0     | 3.9.0     |
 143                  * | ------------ | -------------------- | ----- | --------- | --------- |
 144                  * | Viddler      | viddler.com          |  Yes  | 2.9.0     | 4.0.0     |
 145                  * | ------------ | -------------------- | ----- | --------- | --------- |
 146                  *
 147                  * @see wp_oembed_add_provider()
 148                  *
 149                  * @since 2.9.0
 150                  *
 151                  * @param array $providers An array of popular oEmbed providers.
 152                  */
 153                 $this->providers = apply_filters( 'oembed_providers', $providers );
 154
 155                 // Fix any embeds that contain new lines in the middle of the HTML which breaks wpautop().
 156                 add_filter( 'oembed_dataparse', array($this, '_strip_newlines'), 10, 3 );
 157         }
 158
 159         /**
 160          * Make private/protected methods readable for backwards compatibility.
 161          *
 162          * @since 4.0.0
 163          * @access public
 164          *
 165          * @param callable $name      Method to call.
 166          * @param array    $arguments Arguments to pass when calling.
 167          * @return mixed|bool Return value of the callback, false otherwise.
 168          */
 169         public function __call( $name, $arguments ) {
 170                 return call_user_func_array( array( $this, $name ), $arguments );
 171         }
 172
 173         /**
 174          * Takes a URL and returns the corresponding oEmbed provider's URL, if there is one.
 175          *
 176          * @since 4.0.0
 177          * @access public
 178          *
 179          * @see WP_oEmbed::discover()
 180          *
 181          * @param string        $url  The URL to the content.
 182          * @param string|array  $args Optional provider arguments.
 183          * @return bool|string False on failure, otherwise the oEmbed provider URL.
 184          */
 185         public function get_provider( $url, $args = '' ) {
 186
 187                 $provider = false;
 188
 189                 if ( !isset($args['discover']) )
 190                         $args['discover'] = true;
 191
 192                 foreach ( $this->providers as $matchmask => $data ) {
 193                         list( $providerurl, $regex ) = $data;
 194
 195                         // Turn the asterisk-type provider URLs into regex
 196                         if ( !$regex ) {
 197                                 $matchmask = '#' . str_replace( '___wildcard___', '(.+)', preg_quote( str_replace( '*', '___wildcard___', $matchmask ), '#' ) ) . '#i';
 198                                 $matchmask = preg_replace( '|^#http\\\://|', '#https?\://', $matchmask );
 199                         }
 200
 201                         if ( preg_match( $matchmask, $url ) ) {
 202                                 $provider = str_replace( '{format}', 'json', $providerurl ); // JSON is easier to deal with than XML
 203                                 break;
 204                         }
 205                 }
 206
 207                 if ( !$provider && $args['discover'] )
 208                         $provider = $this->discover( $url );
 209
 210                 return $provider;
 211         }
 212
 213         /**
 214          * Add an oEmbed provider just-in-time when wp_oembed_add_provider() is called
 215          * before the 'plugins_loaded' hook.
 216          *
 217          * The just-in-time addition is for the benefit of the 'oembed_providers' filter.
 218          *
 219          * @since 4.0.0
 220          * @access public
 221          * @static
 222          *
 223          * @see wp_oembed_add_provider()
 224          *
 225          * @param string $format   Format of URL that this provider can handle. You can use
 226          *                         asterisks as wildcards.
 227          * @param string $provider The URL to the oEmbed provider..
 228          * @param bool   $regex    Optional. Whether the $format parameter is in a regex format.
 229          *                         Default false.
 230          */
 231         public static function _add_provider_early( $format, $provider, $regex = false ) {
 232                 if ( empty( self::$early_providers['add'] ) ) {
 233                         self::$early_providers['add'] = array();
 234                 }
 235
 236                 self::$early_providers['add'][ $format ] = array( $provider, $regex );
 237         }
 238
 239         /**
 240          * Remove an oEmbed provider just-in-time when wp_oembed_remove_provider() is called
 241          * before the 'plugins_loaded' hook.
 242          *
 243          * The just-in-time removal is for the benefit of the 'oembed_providers' filter.
 244          *
 245          * @since 4.0.0
 246          * @access public
 247          * @static
 248          *
 249          * @see wp_oembed_remove_provider()
 250          *
 251          * @param string $format The format of URL that this provider can handle. You can use
 252          *                       asterisks as wildcards.
 253          */
 254         public static function _remove_provider_early( $format ) {
 255                 if ( empty( self::$early_providers['remove'] ) ) {
 256                         self::$early_providers['remove'] = array();
 257                 }
 258
 259                 self::$early_providers['remove'][] = $format;
 260         }
 261
 262         /**
 263          * The do-it-all function that takes a URL and attempts to return the HTML.
 264          *
 265          * @see WP_oEmbed::fetch()
 266          * @see WP_oEmbed::data2html()
 267          *
 268          * @param string $url The URL to the content that should be attempted to be embedded.
 269          * @param array $args Optional arguments. Usually passed from a shortcode.
 270          * @return bool|string False on failure, otherwise the UNSANITIZED (and potentially unsafe) HTML that should be used to embed.
 271          */
 272         function get_html( $url, $args = '' ) {
 273                 $provider = $this->get_provider( $url, $args );
 274
 275                 if ( !$provider || false === $data = $this->fetch( $provider, $url, $args ) )
 276                         return false;
 277
 278                 /**
 279                  * Filter the HTML returned by the oEmbed provider.
 280                  *
 281                  * @since 2.9.0
 282                  *
 283                  * @param string $data The returned oEmbed HTML.
 284                  * @param string $url  URL of the content to be embedded.
 285                  * @param array  $args Optional arguments, usually passed from a shortcode.
 286                  */
 287                 return apply_filters( 'oembed_result', $this->data2html( $data, $url ), $url, $args );
 288         }
 289
 290         /**
 291          * Attempts to find oEmbed provider discovery <link> tags at the given URL.
 292          *
 293          * @param string $url The URL that should be inspected for discovery <link> tags.
 294          * @return bool|string False on failure, otherwise the oEmbed provider URL.
 295          */
 296         public function discover( $url ) {
 297                 $providers = array();
 298
 299                 /**
 300                  * Filter oEmbed remote get arguments.
 301                  *
 302                  * @since 4.0.0
 303                  *
 304                  * @see WP_Http::request()
 305                  *
 306                  * @param array  $args oEmbed remote get arguments.
 307                  * @param string $url  URL to be inspected.
 308                  */
 309                 $args = apply_filters( 'oembed_remote_get_args', array(), $url );
 310
 311                 // Fetch URL content
 312                 $request = wp_safe_remote_get( $url, $args );
 313                 if ( $html = wp_remote_retrieve_body( $request ) ) {
 314
 315                         /**
 316                          * Filter the link types that contain oEmbed provider URLs.
 317                          *
 318                          * @since 2.9.0
 319                          *
 320                          * @param array $format Array of oEmbed link types. Accepts 'application/json+oembed',
 321                          *                      'text/xml+oembed', and 'application/xml+oembed' (incorrect,
 322                          *                      used by at least Vimeo).
 323                          */
 324                         $linktypes = apply_filters( 'oembed_linktypes', array(
 325                                 'application/json+oembed' => 'json',
 326                                 'text/xml+oembed' => 'xml',
 327                                 'application/xml+oembed' => 'xml',
 328                         ) );
 329
 330                         // Strip <body>
 331                         $html = substr( $html, 0, stripos( $html, '</head>' ) );
 332
 333                         // Do a quick check
 334                         $tagfound = false;
 335                         foreach ( $linktypes as $linktype => $format ) {
 336                                 if ( stripos($html, $linktype) ) {
 337                                         $tagfound = true;
 338                                         break;
 339                                 }
 340                         }
 341
 342                         if ( $tagfound && preg_match_all( '/<link([^<>]+)>/i', $html, $links ) ) {
 343                                 foreach ( $links[1] as $link ) {
 344                                         $atts = shortcode_parse_atts( $link );
 345
 346                                         if ( !empty($atts['type']) && !empty($linktypes[$atts['type']]) && !empty($atts['href']) ) {
 347                                                 $providers[$linktypes[$atts['type']]] = $atts['href'];
 348
 349                                                 // Stop here if it's JSON (that's all we need)
 350                                                 if ( 'json' == $linktypes[$atts['type']] )
 351                                                         break;
 352                                         }
 353                                 }
 354                         }
 355                 }
 356
 357                 // JSON is preferred to XML
 358                 if ( !empty($providers['json']) )
 359                         return $providers['json'];
 360                 elseif ( !empty($providers['xml']) )
 361                         return $providers['xml'];
 362                 else
 363                         return false;
 364         }
 365
 366         /**
 367          * Connects to a oEmbed provider and returns the result.
 368          *
 369          * @param string $provider The URL to the oEmbed provider.
 370          * @param string $url The URL to the content that is desired to be embedded.
 371          * @param array $args Optional arguments. Usually passed from a shortcode.
 372          * @return bool|object False on failure, otherwise the result in the form of an object.
 373          */
 374         public function fetch( $provider, $url, $args = '' ) {
 375                 $args = wp_parse_args( $args, wp_embed_defaults( $url ) );
 376
 377                 $provider = add_query_arg( 'maxwidth', (int) $args['width'], $provider );
 378                 $provider = add_query_arg( 'maxheight', (int) $args['height'], $provider );
 379                 $provider = add_query_arg( 'url', urlencode($url), $provider );
 380
 381                 /**
 382                  * Filter the oEmbed URL to be fetched.
 383                  *
 384                  * @since 2.9.0
 385                  *
 386                  * @param string $provider URL of the oEmbed provider.
 387                  * @param string $url      URL of the content to be embedded.
 388                  * @param array  $args     Optional arguments, usually passed from a shortcode.
 389                  */
 390                 $provider = apply_filters( 'oembed_fetch_url', $provider, $url, $args );
 391
 392                 foreach( array( 'json', 'xml' ) as $format ) {
 393                         $result = $this->_fetch_with_format( $provider, $format );
 394                         if ( is_wp_error( $result ) && 'not-implemented' == $result->get_error_code() )
 395                                 continue;
 396                         return ( $result && ! is_wp_error( $result ) ) ? $result : false;
 397                 }
 398                 return false;
 399         }
 400
 401         /**
 402          * Fetches result from an oEmbed provider for a specific format and complete provider URL
 403          *
 404          * @since 3.0.0
 405          * @access private
 406          * @param string $provider_url_with_args URL to the provider with full arguments list (url, maxheight, etc.)
 407          * @param string $format Format to use
 408          * @return bool|object False on failure, otherwise the result in the form of an object.
 409          */
 410         private function _fetch_with_format( $provider_url_with_args, $format ) {
 411                 $provider_url_with_args = add_query_arg( 'format', $format, $provider_url_with_args );
 412
 413                 /** This filter is documented in wp-includes/class-oembed.php */
 414                 $args = apply_filters( 'oembed_remote_get_args', array(), $provider_url_with_args );
 415
 416                 $response = wp_safe_remote_get( $provider_url_with_args, $args );
 417                 if ( 501 == wp_remote_retrieve_response_code( $response ) )
 418                         return new WP_Error( 'not-implemented' );
 419                 if ( ! $body = wp_remote_retrieve_body( $response ) )
 420                         return false;
 421                 $parse_method = "_parse_$format";
 422                 return $this->$parse_method( $body );
 423         }
 424
 425         /**
 426          * Parses a json response body.
 427          *
 428          * @since 3.0.0
 429          * @access private
 430          */
 431         private function _parse_json( $response_body ) {
 432                 return ( ( $data = json_decode( trim( $response_body ) ) ) && is_object( $data ) ) ? $data : false;
 433         }
 434
 435         /**
 436          * Parses an XML response body.
 437          *
 438          * @since 3.0.0
 439          * @access private
 440          */
 441         private function _parse_xml( $response_body ) {
 442                 if ( ! function_exists( 'libxml_disable_entity_loader' ) )
 443                         return false;
 444
 445                 $loader = libxml_disable_entity_loader( true );
 446                 $errors = libxml_use_internal_errors( true );
 447
 448                 $return = $this->_parse_xml_body( $response_body );
 449
 450                 libxml_use_internal_errors( $errors );
 451                 libxml_disable_entity_loader( $loader );
 452
 453                 return $return;
 454         }
 455
 456         /**
 457          * Helper function for parsing an XML response body.
 458          *
 459          * @since 3.6.0
 460          * @access private
 461          */
 462         private function _parse_xml_body( $response_body ) {
 463                 if ( ! function_exists( 'simplexml_import_dom' ) || ! class_exists( 'DOMDocument' ) )
 464                         return false;
 465
 466                 $dom = new DOMDocument;
 467                 $success = $dom->loadXML( $response_body );
 468                 if ( ! $success )
 469                         return false;
 470
 471                 if ( isset( $dom->doctype ) )
 472                         return false;
 473
 474                 foreach ( $dom->childNodes as $child ) {
 475                         if ( XML_DOCUMENT_TYPE_NODE === $child->nodeType )
 476                                 return false;
 477                 }
 478
 479                 $xml = simplexml_import_dom( $dom );
 480                 if ( ! $xml )
 481                         return false;
 482
 483                 $return = new stdClass;
 484                 foreach ( $xml as $key => $value ) {
 485                         $return->$key = (string) $value;
 486                 }
 487
 488                 return $return;
 489         }
 490
 491         /**
 492          * Converts a data object from {@link WP_oEmbed::fetch()} and returns the HTML.
 493          *
 494          * @param object $data A data object result from an oEmbed provider.
 495          * @param string $url The URL to the content that is desired to be embedded.
 496          * @return bool|string False on error, otherwise the HTML needed to embed.
 497          */
 498         public function data2html( $data, $url ) {
 499                 if ( ! is_object( $data ) || empty( $data->type ) )
 500                         return false;
 501
 502                 $return = false;
 503
 504                 switch ( $data->type ) {
 505                         case 'photo':
 506                                 if ( empty( $data->url ) || empty( $data->width ) || empty( $data->height ) )
 507                                         break;
 508                                 if ( ! is_string( $data->url ) || ! is_numeric( $data->width ) || ! is_numeric( $data->height ) )
 509                                         break;
 510
 511                                 $title = ! empty( $data->title ) && is_string( $data->title ) ? $data->title : '';
 512                                 $return = '<a href="' . esc_url( $url ) . '"><img src="' . esc_url( $data->url ) . '" alt="' . esc_attr($title) . '" width="' . esc_attr($data->width) . '" height="' . esc_attr($data->height) . '" /></a>';
 513                                 break;
 514
 515                         case 'video':
 516                         case 'rich':
 517                                 if ( ! empty( $data->html ) && is_string( $data->html ) )
 518                                         $return = $data->html;
 519                                 break;
 520
 521                         case 'link':
 522                                 if ( ! empty( $data->title ) && is_string( $data->title ) )
 523                                         $return = '<a href="' . esc_url( $url ) . '">' . esc_html( $data->title ) . '</a>';
 524                                 break;
 525
 526                         default:
 527                                 $return = false;
 528                 }
 529
 530                 /**
 531                  * Filter the returned oEmbed HTML.
 532                  *
 533                  * Use this filter to add support for custom data types, or to filter the result.
 534                  *
 535                  * @since 2.9.0
 536                  *
 537                  * @param string $return The returned oEmbed HTML.
 538                  * @param object $data   A data object result from an oEmbed provider.
 539                  * @param string $url    The URL of the content to be embedded.
 540                  */
 541                 return apply_filters( 'oembed_dataparse', $return, $data, $url );
 542         }
 543
 544         /**
 545          * Strip any new lines from the HTML.
 546          *
 547          * @access private
 548          * @param string $html Existing HTML.
 549          * @param object $data Data object from WP_oEmbed::data2html()
 550          * @param string $url The original URL passed to oEmbed.
 551          * @return string Possibly modified $html
 552          */
 553         private function _strip_newlines( $html, $data, $url ) {
 554                 if ( false !== strpos( $html, "\n" ) )
 555                         $html = str_replace( array( "\r\n", "\n" ), '', $html );
 556
 557                 return $html;
 558         }
 559 }
 560
 561 /**
 562  * Returns the initialized {@link WP_oEmbed} object
 563  *
 564  * @since 2.9.0
 565  * @access private
 566  *
 567  * @see WP_oEmbed
 568  * @uses WP_oEmbed
 569  *
 570  * @return WP_oEmbed object.
 571  */
 572 function _wp_oembed_get_object() {
 573         static $wp_oembed;
 574
 575         if ( is_null($wp_oembed) )
 576                 $wp_oembed = new WP_oEmbed();
 577
 578         return $wp_oembed;
 579 }