[PHP] IP체크 정규식

IP유효성 체크

function checkIPAddr($ip){
	$result = 0;

	if (preg_match('/^(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)(?:[.](?:25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)){3}$/',$ip)){
    		$result = 1;
	}
	return $result;
}
$test = checkIPAddr('1.1.1.1')
echo $test