- var_dump: documentation ( source)
- preg_match: documentation ( source)
- unserialize: documentation ( source)
<?php
$value = 'C:+8:"stdClass":0:{}';
$obj = unserialize($value);
$ret = (bool)preg_match('/(^|;|{|})O:\+?[0-9]+:"/', $value);
var_dump($value, $ret, $obj);