- unserialize: documentation ( source)
<?php
class ToS{var $message; var $file; function getMessage(){return $this->message;}function __toString(){die("hi there");}}
//$e=new exception;
$e=unserialize('O:9:"Exception":1:{s:19:"'."\0".'Exception'."\0".'previous";O:3:"ToS":2:{s:7:"message";s:2:"hi";s:4:"file";s:3:"bye";}}');
echo $e;