protected function _fileGetContents($file)
    {
        $result = false;
        if (!is_file($file)) {
            return false;
        }
        $f = @fopen($file, 'rb');
        if ($f) {
            if ($this->_options['file_locking']) @flock($f, LOCK_SH);
            $result = stream_get_contents($f);
            if ($this->_options['file_locking']) @flock($f, LOCK_UN);
            @fclose($f);
        }
        return $result;
    }