Request::getFormat PHP Method

        public static function getFormat($mimeType)
        {
            //Method inherited from \Symfony\Component\HttpFoundation\Request
            return \Illuminate\Http\Request::getFormat($mimeType);
        }

 public function getOutput($connections)
 {
     if (parent::getFormat() == "xml") {
         return new XMLConnectionOutput($connections);
     } else {
         if (parent::getFormat() == "json") {
             return new JSONConnectionOutput($connections);
         } else {
             throw new Exception("No outputformat specified");
         }
     }
 }