public static function can_do_advanced()
 {
     if (self::$_can_do_advanced < 0) {
         $filemod = cms_utils::get_module('FileManager');
         $config = cmsms()->GetConfig();
         if (startswith($config['uploads_path'], $config['root_path']) && $filemod->AdvancedAccessAllowed()) {
             self::$_can_do_advanced = 1;
         } else {
             self::$_can_do_advanced = 0;
         }
     }
     return self::$_can_do_advanced;
 }