/**
  * Show some info about movies in post view.
  * 
  * Add a filter on the_content hook to display infos selected in options
  * about the movie: note, director, overview, actors…
  *
  * @since    1.0
  * 
  * @param    string      $content The original post content
  *
  * @return   string      The filtered content containing original content plus movie infos if available, the untouched original content else.
  */
 public static function movie_vintage_content($content = null)
 {
     // Naughty PHP 5.3 fix
     $details = WPMOLY_Movies::movie_details();
     $metadata = WPMOLY_Movies::movie_metadata();
     $html = $details . $metadata;
     /**
      * Filter vintage content
      * 
      * @param    string    $html New content: details + metadata
      * @param    string    $details Details content
      * @param    string    $metadata Metadata content
      * @param    string    $content Old content
      */
     $html = apply_filters('wpmoly_movie_vintage_content', $html, $details, $metadata, $content);
     return $html;
 }