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 https://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         private $compat_methods = array( '_fetch_with_format', '_parse_json', '_parse_xml', '_parse_body' );
  25
  26         /**
  27          * Constructor
  28          *
  29          * @since 2.9.0
  30          */
  31         public function __construct() {
  32                 $providers = array(
  33                         '#http://(www\.)?youtube\.com/watch.*#i'              => array( 'http://www.youtube.com/oembed',                      true  ),
  34                         '#https://(www\.)?youtube\.com/watch.*#i'             => array( 'http://www.youtube.com/oembed?scheme=https',         true  ),
  35                         '#http://(www\.)?youtube\.com/playlist.*#i'           => array( 'http://www.youtube.com/oembed',                      true  ),
  36                         '#https://(www\.)?youtube\.com/playlist.*#i'          => array( 'http://www.youtube.com/oembed?scheme=https',         true  ),
  37                         '#http://youtu\.be/.*#i'                              => array( 'http://www.youtube.com/oembed',                      true  ),
  38                         '#https://youtu\.be/.*#i'                             => array( 'http://www.youtube.com/oembed?scheme=https',         true  ),
  39                         'http://blip.tv/*'                                    => array( 'http://blip.tv/oembed/',                             false ),
  40                         '#https?://(.+\.)?vimeo\.com/.*#i'                    => array( 'http://vimeo.com/api/oembed.{format}',               true  ),
  41                         '#https?://(www\.)?dailymotion\.com/.*#i'             => array( 'http://www.dailymotion.com/services/oembed',         true  ),
  42                         'http://dai.ly/*'                                     => array( 'http://www.dailymotion.com/services/oembed',         false ),
  43                         '#https?://(www\.)?flickr\.com/.*#i'                  => array( 'https://www.flickr.com/services/oembed/',            true  ),
  44                         '#https?://flic\.kr/.*#i'                             => array( 'https://www.flickr.com/services/oembed/',            true  ),
  45                         '#https?://(.+\.)?smugmug\.com/.*#i'                  => array( 'http://api.smugmug.com/services/oembed/',            true  ),
  46                         '#https?://(www\.)?hulu\.com/watch/.*#i'              => array( 'http://www.hulu.com/api/oembed.{format}',            true  ),
  47                         'http://i*.photobucket.com/albums/*'                  => array( 'http://photobucket.com/oembed',                      false ),
  48                         'http://gi*.photobucket.com/groups/*'                 => array( 'http://photobucket.com/oembed',                      false ),
  49                         '#https?://(www\.)?scribd\.com/doc/.*#i'              => array( 'http://www.scribd.com/services/oembed',              true  ),
  50                         '#https?://wordpress.tv/.*#i'                         => array( 'http://wordpress.tv/oembed/',                        true  ),
  51                         '#https?://(.+\.)?polldaddy\.com/.*#i'                => array( 'https://polldaddy.com/oembed/',                      true  ),
  52                         '#https?://poll\.fm/.*#i'                             => array( 'https://polldaddy.com/oembed/',                      true  ),
  53                         '#https?://(www\.)?funnyordie\.com/videos/.*#i'       => array( 'http://www.funnyordie.com/oembed',                   true  ),
  54                         '#https?://(www\.)?twitter\.com/.+?/status(es)?/.*#i' => array( 'https://api.twitter.com/1/statuses/oembed.{format}', true  ),
  55                         '#https?://vine.co/v/.*#i'                            => array( 'https://vine.co/oembed.{format}',                    true  ),
  56                         '#https?://(www\.)?soundcloud\.com/.*#i'              => array( 'http://soundcloud.com/oembed',                       true  ),
  57                         '#https?://(.+?\.)?slideshare\.net/.*#i'              => array( 'https://www.slideshare.net/api/oembed/2',            true  ),
  58                         '#https?://instagr(\.am|am\.com)/p/.*#i'              => array( 'https://api.instagram.com/oembed',                   true  ),
  59                         '#https?://(www\.)?rdio\.com/.*#i'                    => array( 'http://www.rdio.com/api/oembed/',                    true  ),
  60                         '#https?://rd\.io/x/.*#i'                             => array( 'http://www.rdio.com/api/oembed/',                    true  ),
  61                         '#https?://(open|play)\.spotify\.com/.*#i'            => array( 'https://embed.spotify.com/oembed/',                  true  ),
  62                         '#https?://(.+\.)?imgur\.com/.*#i'                    => array( 'http://api.imgur.com/oembed',                        true  ),
  63                         '#https?://(www\.)?meetu(\.ps|p\.com)/.*#i'           => array( 'http://api.meetup.com/oembed',                       true  ),
  64                         '#https?://(www\.)?issuu\.com/.+/docs/.+#i'           => array( 'http://issuu.com/oembed_wp',                         true  ),
  65                         '#https?://(www\.)?collegehumor\.com/video/.*#i'      => array( 'http://www.collegehumor.com/oembed.{format}',        true  ),
  66                         '#https?://(www\.)?mixcloud\.com/.*#i'                => array( 'http://www.mixcloud.com/oembed',                     true  ),
  67                         '#https?://(www\.|embed\.)?ted\.com/talks/.*#i'       => array( 'http://www.ted.com/talks/oembed.{format}',           true  ),
  68                         '#https?://(www\.)?(animoto|video214)\.com/play/.*#i' => array( 'http://animoto.com/oembeds/create',                  true  ),
  69                         '#https?://(.+)\.tumblr\.com/post/.*#i'               => array( 'https://www.tumblr.com/oembed/1.0',                  true  ),
  70                         '#https?://(www\.)?kickstarter\.com/projects/.*#i'    => array( 'https://www.kickstarter.com/services/oembed',        true  ),
  71                         '#https?://kck\.st/.*#i'                              => array( 'https://www.kickstarter.com/services/oembed',        true  ),
  72                 );
  73
  74                 if ( ! empty( self::$early_providers['add'] ) ) {
  75                         foreach ( self::$early_providers['add'] as $format => $data ) {
  76                                 $providers[ $format ] = $data;
  77                         }
  78                 }
  79
  80                 if ( ! empty( self::$early_providers['remove'] ) ) {
  81                         foreach ( self::$early_providers['remove'] as $format ) {
  82                                 unset( $providers[ $format ] );
  83                         }
  84                 }
  85
  86                 self::$early_providers = array();
  87
  88                 /**
  89                  * Filter the list of oEmbed providers.
  90                  *
  91                  * Discovery is disabled for users lacking the unfiltered_html capability.
  92                  * Only providers in this array will be used for those users.
  93                  *
  94                  * Supported providers:
  95                  *
  96                  * | ------------ | -------------------- | ----- | --------- |
  97                  * |   Provider   |        Flavor        |  SSL  |   Since   |
  98                  * | ------------ | -------------------- | ----- | --------- |
  99                  * | Blip         | blip.tv              |   !   | 2.9.0     |
 100                  * | Dailymotion  | dailymotion.com      |  Yes  | 2.9.0     |
 101                  * | Flickr       | flickr.com           |  Yes  | 2.9.0     |
 102                  * | Hulu         | hulu.com             |  Yes  | 2.9.0     |
 103                  * | Photobucket  | photobucket.com      |   !   | 2.9.0     |
 104                  * | Scribd       | scribd.com           |  Yes  | 2.9.0     |
 105                  * | Vimeo        | vimeo.com            |  Yes  | 2.9.0     |
 106                  * | WordPress.tv | wordpress.tv         |  Yes  | 2.9.0     |
 107                  * | YouTube      | youtube.com/watch    |  Yes  | 2.9.0     |
 108                  * | ------------ | -------------------- | ----- | --------- |
 109                  * | Funny or Die | funnyordie.com       |  Yes  | 3.0.0     |
 110                  * | Polldaddy    | polldaddy.com        |  Yes  | 3.0.0     |
 111                  * | SmugMug      | smugmug.com          |  Yes  | 3.0.0     |
 112                  * | YouTube      | youtu.be             |  Yes  | 3.0.0     |
 113                  * | ------------ | -------------------- | ----- | --------- |
 114                  * | Twitter      | twitter.com          |  Yes  | 3.4.0     |
 115                  * | ------------ | -------------------- | ----- | --------- |
 116                  * | Instagram    | instagram.com        |  Yes  | 3.5.0     |
 117                  * | Instagram    | instagr.am           |  Yes  | 3.5.0     |
 118                  * | Slideshare   | slideshare.net       |  Yes  | 3.5.0     |
 119                  * | SoundCloud   | soundcloud.com       |  Yes  | 3.5.0     |
 120                  * | ------------ | -------------------- | ----- | --------- |
 121                  * | Dailymotion  | dai.ly               |   !   | 3.6.0     |
 122                  * | Flickr       | flic.kr              |  Yes  | 3.6.0     |
 123                  * | Rdio         | rdio.com             |  Yes  | 3.6.0     |
 124                  * | Rdio         | rd.io                |  Yes  | 3.6.0     |
 125                  * | Spotify      | spotify.com          |  Yes  | 3.6.0     |
 126                  * | ------------ | -------------------- | ----- | --------- |
 127                  * | Imgur        | imgur.com            |  Yes  | 3.9.0     |
 128                  * | Meetup.com   | meetup.com           |  Yes  | 3.9.0     |
 129                  * | Meetup.com   | meetu.ps             |  Yes  | 3.9.0     |
 130                  * | ------------ | -------------------- | ----- | --------- |
 131                  * | Animoto      | animoto.com          |  Yes  | 4.0.0     |
 132                  * | Animoto      | video214.com         |  Yes  | 4.0.0     |
 133                  * | CollegeHumor | collegehumor.com     |  Yes  | 4.0.0     |
 134                  * | Issuu        | issuu.com            |  Yes  | 4.0.0     |
 135                  * | Mixcloud     | mixcloud.com         |  Yes  | 4.0.0     |
 136                  * | Polldaddy    | poll.fm              |  Yes  | 4.0.0     |
 137                  * | TED          | ted.com              |  Yes  | 4.0.0     |
 138                  * | YouTube      | youtube.com/playlist |  Yes  | 4.0.0     |
 139                  * | ------------ | -------------------- | ----- | --------- |
 140                  * | Vine         | vine.co              |  Yes  | 4.1.0     |
 141                  * | ------------ | -------------------- | ----- | --------- |
 142                  * | Tumblr       | tumblr.com           |  Yes  | 4.2.0     |
 143                  * | Kickstarter  | kickstarter.com      |  Yes  | 4.2.0     |
 144                  * | Kickstarter  | kck.st               |  Yes  | 4.2.0     |
 145                  * | ------------ | -------------------- | ----- | --------- |
 146                  *
 147                  * No longer supported providers:
 148                  *
 149                  * | ------------ | -------------------- | ----- | --------- | --------- |
 150                  * |   Provider   |        Flavor        |  SSL  |   Since   |  Removed  |
 151                  * | ------------ | -------------------- | ----- | --------- | --------- |
 152                  * | Qik          | qik.com              |  Yes  | 2.9.0     | 3.9.0     |
 153                  * | ------------ | -------------------- | ----- | --------- | --------- |
 154                  * | Viddler      | viddler.com          |  Yes  | 2.9.0     | 4.0.0     |
 155                  * | ------------ | -------------------- | ----- | --------- | --------- |
 156                  * | Revision3    | revision3.com        |   !   | 2.9.0     | 4.2.0     |
 157                  * | ------------ | -------------------- | ----- | --------- | --------- |
 158                  *
 159                  * @see wp_oembed_add_provider()
 160                  *
 161                  * @since 2.9.0
 162                  *
 163                  * @param array $providers An array of popular oEmbed providers.
 164                  */
 165                 $this->providers = apply_filters( 'oembed_providers', $providers );
 166
 167                 // Fix any embeds that contain new lines in the middle of the HTML which breaks wpautop().
 168                 add_filter( 'oembed_dataparse', array($this, '_strip_newlines'), 10, 3 );
 169         }
 170
 171         /**
 172          * Make private/protected methods readable for backwards compatibility.
 173          *
 174          * @since 4.0.0
 175          * @access public
 176          *
 177          * @param callable $name      Method to call.
 178          * @param array    $arguments Arguments to pass when calling.
 179          * @return mixed|bool Return value of the callback, false otherwise.
 180          */
 181         public function __call( $name, $arguments ) {
 182                 if ( in_array( $name, $this->compat_methods ) ) {
 183                         return call_user_func_array( array( $this, $name ), $arguments );
 184                 }
 185                 return false;
 186         }
 187
 188         /**
 189          * Takes a URL and returns the corresponding oEmbed provider's URL, if there is one.
 190          *
 191          * @since 4.0.0
 192          * @access public
 193          *
 194          * @see WP_oEmbed::discover()
 195          *
 196          * @param string        $url  The URL to the content.
 197          * @param string|array  $args Optional provider arguments.
 198          * @return bool|string False on failure, otherwise the oEmbed provider URL.
 199          */
 200         public function get_provider( $url, $args = '' ) {
 201
 202                 $provider = false;
 203
 204                 if ( !isset($args['discover']) )
 205                         $args['discover'] = true;
 206
 207                 foreach ( $this->providers as $matchmask => $data ) {
 208                         list( $providerurl, $regex ) = $data;
 209
 210                         // Turn the asterisk-type provider URLs into regex
 211                         if ( !$regex ) {
 212                                 $matchmask = '#' . str_replace( '___wildcard___', '(.+)', preg_quote( str_replace( '*', '___wildcard___', $matchmask ), '#' ) ) . '#i';
 213                                 $matchmask = preg_replace( '|^#http\\\://|', '#https?\://', $matchmask );
 214                         }
 215
 216                         if ( preg_match( $matchmask, $url ) ) {
 217                                 $provider = str_replace( '{format}', 'json', $providerurl ); // JSON is easier to deal with than XML
 218                                 break;
 219                         }
 220                 }
 221
 222                 if ( !$provider && $args['discover'] )
 223                         $provider = $this->discover( $url );
 224
 225                 return $provider;
 226         }
 227
 228         /**
 229          * Add an oEmbed provider just-in-time when wp_oembed_add_provider() is called
 230          * before the 'plugins_loaded' hook.
 231          *
 232          * The just-in-time addition is for the benefit of the 'oembed_providers' filter.
 233          *
 234          * @since 4.0.0
 235          * @access public
 236          * @static
 237          *
 238          * @see wp_oembed_add_provider()
 239          *
 240          * @param string $format   Format of URL that this provider can handle. You can use
 241          *                         asterisks as wildcards.
 242          * @param string $provider The URL to the oEmbed provider..
 243          * @param bool   $regex    Optional. Whether the $format parameter is in a regex format.
 244          *                         Default false.
 245          */
 246         public static function _add_provider_early( $format, $provider, $regex = false ) {
 247                 if ( empty( self::$early_providers['add'] ) ) {
 248                         self::$early_providers['add'] = array();
 249                 }
 250
 251                 self::$early_providers['add'][ $format ] = array( $provider, $regex );
 252         }
 253
 254         /**
 255          * Remove an oEmbed provider just-in-time when wp_oembed_remove_provider() is called
 256          * before the 'plugins_loaded' hook.
 257          *
 258          * The just-in-time removal is for the benefit of the 'oembed_providers' filter.
 259          *
 260          * @since 4.0.0
 261          * @access public
 262          * @static
 263          *
 264          * @see wp_oembed_remove_provider()
 265          *
 266          * @param string $format The format of URL that this provider can handle. You can use
 267          *                       asterisks as wildcards.
 268          */
 269         public static function _remove_provider_early( $format ) {
 270                 if ( empty( self::$early_providers['remove'] ) ) {
 271                         self::$early_providers['remove'] = array();
 272                 }
 273
 274                 self::$early_providers['remove'][] = $format;
 275         }
 276
 277         /**
 278          * The do-it-all function that takes a URL and attempts to return the HTML.
 279          *
 280          * @see WP_oEmbed::fetch()
 281          * @see WP_oEmbed::data2html()
 282          *
 283          * @param string $url The URL to the content that should be attempted to be embedded.
 284          * @param array $args Optional arguments. Usually passed from a shortcode.
 285          * @return false|string False on failure, otherwise the UNSANITIZED (and potentially unsafe) HTML that should be used to embed.
 286          */
 287         public function get_html( $url, $args = '' ) {
 288                 $provider = $this->get_provider( $url, $args );
 289
 290                 if ( !$provider || false === $data = $this->fetch( $provider, $url, $args ) )
 291                         return false;
 292
 293                 /**
 294                  * Filter the HTML returned by the oEmbed provider.
 295                  *
 296                  * @since 2.9.0
 297                  *
 298                  * @param string $data The returned oEmbed HTML.
 299                  * @param string $url  URL of the content to be embedded.
 300                  * @param array  $args Optional arguments, usually passed from a shortcode.
 301                  */
 302                 return apply_filters( 'oembed_result', $this->data2html( $data, $url ), $url, $args );
 303         }
 304
 305         /**
 306          * Attempts to discover link tags at the given URL for an oEmbed provider.
 307          *
 308          * @param string $url The URL that should be inspected for discovery `<link>` tags.
 309          * @return bool|string False on failure, otherwise the oEmbed provider URL.
 310          */
 311         public function discover( $url ) {
 312                 $providers = array();
 313
 314                 /**
 315                  * Filter oEmbed remote get arguments.
 316                  *
 317                  * @since 4.0.0
 318                  *
 319                  * @see WP_Http::request()
 320                  *
 321                  * @param array  $args oEmbed remote get arguments.
 322                  * @param string $url  URL to be inspected.
 323                  */
 324                 $args = apply_filters( 'oembed_remote_get_args', array(), $url );
 325
 326                 // Fetch URL content
 327                 $request = wp_safe_remote_get( $url, $args );
 328                 if ( $html = wp_remote_retrieve_body( $request ) ) {
 329
 330                         /**
 331                          * Filter the link types that contain oEmbed provider URLs.
 332                          *
 333                          * @since 2.9.0
 334                          *
 335                          * @param array $format Array of oEmbed link types. Accepts 'application/json+oembed',
 336                          *                      'text/xml+oembed', and 'application/xml+oembed' (incorrect,
 337                          *                      used by at least Vimeo).
 338                          */
 339                         $linktypes = apply_filters( 'oembed_linktypes', array(
 340                                 'application/json+oembed' => 'json',
 341                                 'text/xml+oembed' => 'xml',
 342                                 'application/xml+oembed' => 'xml',
 343                         ) );
 344
 345                         // Strip <body>
 346                         $html = substr( $html, 0, stripos( $html, '</head>' ) );
 347
 348                         // Do a quick check
 349                         $tagfound = false;
 350                         foreach ( $linktypes as $linktype => $format ) {
 351                                 if ( stripos($html, $linktype) ) {
 352                                         $tagfound = true;
 353                                         break;
 354                                 }
 355                         }
 356
 357                         if ( $tagfound && preg_match_all( '#<link([^<>]+)/?>#iU', $html, $links ) ) {
 358                                 foreach ( $links[1] as $link ) {
 359                                         $atts = shortcode_parse_atts( $link );
 360
 361                                         if ( !empty($atts['type']) && !empty($linktypes[$atts['type']]) && !empty($atts['href']) ) {
 362                                                 $providers[$linktypes[$atts['type']]] = htmlspecialchars_decode( $atts['href'] );
 363
 364                                                 // Stop here if it's JSON (that's all we need)
 365                                                 if ( 'json' == $linktypes[$atts['type']] )
 366                                                         break;
 367                                         }
 368                                 }
 369                         }
 370                 }
 371
 372                 // JSON is preferred to XML
 373                 if ( !empty($providers['json']) )
 374                         return $providers['json'];
 375                 elseif ( !empty($providers['xml']) )
 376                         return $providers['xml'];
 377                 else
 378                         return false;
 379         }
 380
 381         /**
 382          * Connects to a oEmbed provider and returns the result.
 383          *
 384          * @param string $provider The URL to the oEmbed provider.
 385          * @param string $url The URL to the content that is desired to be embedded.
 386          * @param array $args Optional arguments. Usually passed from a shortcode.
 387          * @return bool|object False on failure, otherwise the result in the form of an object.
 388          */
 389         public function fetch( $provider, $url, $args = '' ) {
 390                 $args = wp_parse_args( $args, wp_embed_defaults( $url ) );
 391
 392                 $provider = add_query_arg( 'maxwidth', (int) $args['width'], $provider );
 393                 $provider = add_query_arg( 'maxheight', (int) $args['height'], $provider );
 394                 $provider = add_query_arg( 'url', urlencode($url), $provider );
 395
 396                 /**
 397                  * Filter the oEmbed URL to be fetched.
 398                  *
 399                  * @since 2.9.0
 400                  *
 401                  * @param string $provider URL of the oEmbed provider.
 402                  * @param string $url      URL of the content to be embedded.
 403                  * @param array  $args     Optional arguments, usually passed from a shortcode.
 404                  */
 405                 $provider = apply_filters( 'oembed_fetch_url', $provider, $url, $args );
 406
 407                 foreach( array( 'json', 'xml' ) as $format ) {
 408                         $result = $this->_fetch_with_format( $provider, $format );
 409                         if ( is_wp_error( $result ) && 'not-implemented' == $result->get_error_code() )
 410                                 continue;
 411                         return ( $result && ! is_wp_error( $result ) ) ? $result : false;
 412                 }
 413                 return false;
 414         }
 415
 416         /**
 417          * Fetches result from an oEmbed provider for a specific format and complete provider URL
 418          *
 419          * @since 3.0.0
 420          * @access private
 421          * @param string $provider_url_with_args URL to the provider with full arguments list (url, maxheight, etc.)
 422          * @param string $format Format to use
 423          * @return bool|object False on failure, otherwise the result in the form of an object.
 424          */
 425         private function _fetch_with_format( $provider_url_with_args, $format ) {
 426                 $provider_url_with_args = add_query_arg( 'format', $format, $provider_url_with_args );
 427
 428                 /** This filter is documented in wp-includes/class-oembed.php */
 429                 $args = apply_filters( 'oembed_remote_get_args', array(), $provider_url_with_args );
 430
 431                 $response = wp_safe_remote_get( $provider_url_with_args, $args );
 432                 if ( 501 == wp_remote_retrieve_response_code( $response ) )
 433                         return new WP_Error( 'not-implemented' );
 434                 if ( ! $body = wp_remote_retrieve_body( $response ) )
 435                         return false;
 436                 $parse_method = "_parse_$format";
 437                 return $this->$parse_method( $body );
 438         }
 439
 440         /**
 441          * Parses a json response body.
 442          *
 443          * @since 3.0.0
 444          * @access private
 445          */
 446         private function _parse_json( $response_body ) {
 447                 return ( ( $data = json_decode( trim( $response_body ) ) ) && is_object( $data ) ) ? $data : false;
 448         }
 449
 450         /**
 451          * Parses an XML response body.
 452          *
 453          * @since 3.0.0
 454          * @access private
 455          */
 456         private function _parse_xml( $response_body ) {
 457                 if ( ! function_exists( 'libxml_disable_entity_loader' ) )
 458                         return false;
 459
 460                 $loader = libxml_disable_entity_loader( true );
 461                 $errors = libxml_use_internal_errors( true );
 462
 463                 $return = $this->_parse_xml_body( $response_body );
 464
 465                 libxml_use_internal_errors( $errors );
 466                 libxml_disable_entity_loader( $loader );
 467
 468                 return $return;
 469         }
 470
 471         /**
 472          * Helper function for parsing an XML response body.
 473          *
 474          * @since 3.6.0
 475          * @access private
 476          */
 477         private function _parse_xml_body( $response_body ) {
 478                 if ( ! function_exists( 'simplexml_import_dom' ) || ! class_exists( 'DOMDocument' ) )
 479                         return false;
 480
 481                 $dom = new DOMDocument;
 482                 $success = $dom->loadXML( $response_body );
 483                 if ( ! $success )
 484                         return false;
 485
 486                 if ( isset( $dom->doctype ) )
 487                         return false;
 488
 489                 foreach ( $dom->childNodes as $child ) {
 490                         if ( XML_DOCUMENT_TYPE_NODE === $child->nodeType )
 491                                 return false;
 492                 }
 493
 494                 $xml = simplexml_import_dom( $dom );
 495                 if ( ! $xml )
 496                         return false;
 497
 498                 $return = new stdClass;
 499                 foreach ( $xml as $key => $value ) {
 500                         $return->$key = (string) $value;
 501                 }
 502
 503                 return $return;
 504         }
 505
 506         /**
 507          * Converts a data object from {@link WP_oEmbed::fetch()} and returns the HTML.
 508          *
 509          * @param object $data A data object result from an oEmbed provider.
 510          * @param string $url The URL to the content that is desired to be embedded.
 511          * @return false|string False on error, otherwise the HTML needed to embed.
 512          */
 513         public function data2html( $data, $url ) {
 514                 if ( ! is_object( $data ) || empty( $data->type ) )
 515                         return false;
 516
 517                 $return = false;
 518
 519                 switch ( $data->type ) {
 520                         case 'photo':
 521                                 if ( empty( $data->url ) || empty( $data->width ) || empty( $data->height ) )
 522                                         break;
 523                                 if ( ! is_string( $data->url ) || ! is_numeric( $data->width ) || ! is_numeric( $data->height ) )
 524                                         break;
 525
 526                                 $title = ! empty( $data->title ) && is_string( $data->title ) ? $data->title : '';
 527                                 $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>';
 528                                 break;
 529
 530                         case 'video':
 531                         case 'rich':
 532                                 if ( ! empty( $data->html ) && is_string( $data->html ) )
 533                                         $return = $data->html;
 534                                 break;
 535
 536                         case 'link':
 537                                 if ( ! empty( $data->title ) && is_string( $data->title ) )
 538                                         $return = '<a href="' . esc_url( $url ) . '">' . esc_html( $data->title ) . '</a>';
 539                                 break;
 540
 541                         default:
 542                                 $return = false;
 543                 }
 544
 545                 /**
 546                  * Filter the returned oEmbed HTML.
 547                  *
 548                  * Use this filter to add support for custom data types, or to filter the result.
 549                  *
 550                  * @since 2.9.0
 551                  *
 552                  * @param string $return The returned oEmbed HTML.
 553                  * @param object $data   A data object result from an oEmbed provider.
 554                  * @param string $url    The URL of the content to be embedded.
 555                  */
 556                 return apply_filters( 'oembed_dataparse', $return, $data, $url );
 557         }
 558
 559         /**
 560          * Strip any new lines from the HTML.
 561          *
 562          * @access public
 563          * @param string $html Existing HTML.
 564          * @param object $data Data object from WP_oEmbed::data2html()
 565          * @param string $url The original URL passed to oEmbed.
 566          * @return string Possibly modified $html
 567          */
 568         public function _strip_newlines( $html, $data, $url ) {
 569                 if ( false === strpos( $html, "\n" ) ) {
 570                         return $html;
 571                 }
 572
 573                 $count = 1;
 574                 $found = array();
 575                 $token = '__PRE__';
 576                 $search = array( "\t", "\n", "\r", ' ' );
 577                 $replace = array( '__TAB__', '__NL__', '__CR__', '__SPACE__' );
 578                 $tokenized = str_replace( $search, $replace, $html );
 579
 580                 preg_match_all( '#(<pre[^>]*>.+?</pre>)#i', $tokenized, $matches, PREG_SET_ORDER );
 581                 foreach ( $matches as $i => $match ) {
 582                         $tag_html = str_replace( $replace, $search, $match[0] );
 583                         $tag_token = $token . $i;
 584
 585                         $found[ $tag_token ] = $tag_html;
 586                         $html = str_replace( $tag_html, $tag_token, $html, $count );
 587                 }
 588
 589                 $replaced = str_replace( $replace, $search, $html );
 590                 $stripped = str_replace( array( "\r\n", "\n" ), '', $replaced );
 591                 $pre = array_values( $found );
 592                 $tokens = array_keys( $found );
 593
 594                 return str_replace( $tokens, $pre, $stripped );
 595         }
 596 }
 597
 598 /**
 599  * Returns the initialized {@link WP_oEmbed} object
 600  *
 601  * @since 2.9.0
 602  * @access private
 603  *
 604  * @see WP_oEmbed
 605  *
 606  * @return WP_oEmbed object.
 607  */
 608 function _wp_oembed_get_object() {
 609         static $wp_oembed;
 610
 611         if ( is_null($wp_oembed) )
 612                 $wp_oembed = new WP_oEmbed();
 613
 614         return $wp_oembed;
 615 }