protected function getPathContent($data)
	{
		$info = file_get_contents($this->path);
		list($expires, $hits) = explode(',', $info);
		if ($expires <= time())
		{
			// it has expires
			unlink($this->path);
			$hits    = 0;
			$expires = null;
		}
		if ($data == 'hits')
		{
			return $hits;
		}
		if ($data == 'expires')
		{
			return $expires;
		}

		return null;
	}