public static function clearTmp($clearFolderPath = '')
    {
        $folderPath = self::_getFolderToClear($clearFolderPath);
        $directoryHandler = opendir($folderPath);

        if (!empty($directoryHandler)) {
            while (false !== ($fileName = readdir($directoryHandler))) {
                $filePath = $folderPath . DIRECTORY_SEPARATOR . $fileName;
                self::_clear($fileName, $filePath);
            }

            closedir($directoryHandler);
        }

        return true;
    }