session_start();
if (!isset($_SESSION["IP"])){
$_SESSION["IP"]=$_SERVER["REMOTE_ADDR"];
$f=fopen("iplog.txt","a+");
fwrite($f,"$_SERVER['REMOTE_ADDR']/n");
fclose($f);
}
$ip = getenv("REMOTE_ADDR"); // get the ip number of the user
echo "Your ip address is $ip It has been logged";
?>