ขึ้น Error Undefined index: HTTP_CLIENT_IP in แบบนี้ครับ เกี่ยวกับเก็บ IP Address

Undefined index: HTTP_CLIENT_IP in D:\xampp\htdocs\suwan\index.php on line 320

Notice: Undefined index: HTTP_X_FORWARDED_FOR in D:\xampp\htdocs\suwan\index.php on line 322

if ($_SERVER['HTTP_CLIENT_IP']) { 
	$IPADDRESS = $_SERVER['HTTP_CLIENT_IP'];
	} elseif (ereg("[0-9]",$_SERVER["HTTP_X_FORWARDED_FOR"] )) { 
	$IPADDRESS = $_SERVER["HTTP_X_FORWARDED_FOR"];
	} else { 
	$IPADDRESS = $_SERVER["REMOTE_ADDR"];
	}