original_string: public function get_embeddable_markers() {
          if (empty($this->embeddablemarkers)) {
              $markers = '';
              foreach ($this->get_players() as $player) {
                  foreach ($player->get_embeddable_markers() as $marker) {
                      if ($markers !== '') {
                          $markers .= '|';
                      }
                      $markers .= preg_quote($marker);
                  }
              }
              $this->embeddablemarkers = $markers;
          }
          return $this->embeddablemarkers;
      }
code: public function get_embeddable_markers() {
          if (empty($this->embeddablemarkers)) {
              $markers = '';
              foreach ($this->get_players() as $player) {
                  foreach ($player->get_embeddable_markers() as $marker) {
                      if ($markers !== '') {
                          $markers .= '|';
                      }
                      $markers .= preg_quote($marker);
                  }
              }
              $this->embeddablemarkers = $markers;
          }
          return $this->embeddablemarkers;
      }
code_tokens: public function get_embeddable_markers ( ) { if ( empty ( $ this -> embeddablemarkers ) ) { $ markers = '' ; foreach ( $ this -> get_players ( ) as $ player ) { foreach ( $ player -> get_embeddable_markers ( ) as $ marker ) { if ( $ markers !== '' ) { $ markers .= '|' ; } $ markers .= preg_quote ( $ marker ) ; } } $ this -> embeddablemarkers = $ markers ; } return $ this -> embeddablemarkers ; }
docstring: Obtains a list of markers that can be used in a regular expression when
  searching for URLs that can be embedded by any player type.
  
  This string is used to improve peformance of regex matching by ensuring
  that the (presumably C) regex code can do a quick keyword check on the
  URL part of a link to see if it matches one of these, rather than having
  to go into PHP code for every single link to see if it can be embedded.
  
  @return string String suitable for use in regex such as '(\.mp4|\.flv)'
docstring_tokens: Obtains a list of markers that can be used in a regular expression when searching for URLs that can be embedded by any player type .