[Pizzy]

Код:

<?php
$P_IP = $_SERVER['REMOTE_ADDR'];
$P_UA = $_SERVER['HTTP_USER_AGENT'];
$Script = $_SERVER['PHP_SELF'];

echo $P_IP, $P_UA, $Script;
?>

$P_IP will be the users IP Address.
$P_UA will be the users browser details
$Script would be the information about the PHP file.