Filter::get PHP Метод

    public static function get($filter_name, $params, $app)
    {
        if (isset(self::$filters[$filter_name])) {
            $fn = self::$filters[$filter_name];
            return call_user_func($fn, $params, $app);
        }
        return $app;
    }

 function save($package)
 {
     $Filter = new Filter();
     $name = $this->getName($Filter->get($package, 'name', null));
     if ($Filter->get($package, 'error', false)) {
         // An HTTP error occurred
         return false;
     } else {
         if (empty($name)) {
             // An empty file name was posted
             return false;
         } else {
             if ($this->exists($name)) {
                 return false;
             }
         }
     }
     $Uploader = new Uploader(array("application/zip"), array(SB_TMP_DIR));
     list($result, $tmpfile) = $Uploader->upload($package, SB_TMP_DIR);
     if (intval($result) != 1) {
         // The file was not uploaded
         return false;
     }
     // handle the file move to the managers dir
     if (!FileSystem::make_dir($this->directory . $name)) {
         // The target directory could not be created
         return false;
     }
     return $this->unzip($tmpfile, $this->directory . $name);
 }