<?php
// Please, make sure if the file you choose in $file line have 777 of permissions.

$ip = $_SERVER['REMOTE_ADDR'];
$browser = $_SERVER['HTTP_USER_AGENT'];
$dateTime = date('Y/m/d G:i:s');
$file = "filename.html";
$file = fopen($file, "a");
$data = "<pre><b>IP</b>: $ip <b>, Browser</b>: $browser <br>on Time : $dateTime <br></pre>";
fwrite($file, $data);
fclose($file);
?>