public function archive($filepath)
	{
		if ( ! ($fp = @fopen($filepath, 'w+b')))
		{
			return FALSE;
		}

		flock($fp, LOCK_EX);

		for ($result = $written = 0, $data = $this->get_zip(), $length = strlen($data); $written < $length; $written += $result)
		{
			if (($result = fwrite($fp, substr($data, $written))) === FALSE)
			{
				break;
			}
		}

		flock($fp, LOCK_UN);
		fclose($fp);

		return is_int($result);
	}