Free PHP IP sniffer script

This IP sniffer script will sniff your visitors IP address and system specs and e-mail the info to you without notifying your visitors 



<?php

$to = 'YOU@HOTMAIL.COM'; // The email address you want notifiactaions sent to
$subject = 'Visitors IP'; // What do you want the subject line of notifications to be?

// PHP Script By Dave Lauderdale
// Published at: www.digi-dl.com

$visitorSpecs = 
"<hr size=2 width=300 align=left>".
"<b>Visitor IP address:</b> ".$_SERVER['REMOTE_ADDR'].
"<br>".
"<b>Visitor system specs:</b> ".$_SERVER['HTTP_USER_AGENT'].
"<br>";

$headers = "Content-type: text/html \nFrom: IP sniffer script";

$body = "<body>
<br>
<table cellspacing=1 cellpadding=2 align=center>
<tr>
<td>
<b><font face=arial size=2>Website visitors IP address and system specs:</font></b>
</td></tr>
<tr>
<td>
<font face=arial size=2> ".$visitorSpecs." </font>
</td></tr></table>
</body>";

mail($to,$subject,$body,$headers);
?>