ฟังก์ชั่น หาค่าไอพี โดยใช้ PHP (Get IP Address By PHP)

<?
function getIP(){
if ($_SERVER['HTTP_CLIENT_IP']) { 
$IP = $_SERVER['HTTP_CLIENT_IP'];
} elseif (ereg("[0-9]",$_SERVER["HTTP_X_FORWARDED_FOR"] )) { 
$IP = $_SERVER["HTTP_X_FORWARDED_FOR"];
} else { 
$IP = $_SERVER["REMOTE_ADDR"];
}
return $IP;
}

echo "Your IP is".getIP();
?>