서버 점검(ping) 테스트

function ping($host, $port=80, $timeout=6) {
	$fsock = fsockopen($host, $port, $errno, $errstr, $timeout);
	if (!$fsock) {
		return FALSE;
	} else {
		fclose($fsock);
		return TRUE;
	}
}

출처 : http://www.cikorea.net/tip/view/2002/page/1/