- var_dump: documentation ( source)
- unserialize: documentation ( source)
<?php
var_dump(unserialize('a:4:{s:13:"newsletter_id";i:26;s:10:"usergroups";a:2:{i:0;i:12;i:1;i:16;}s:13:"only_language";b:1;s:14:"scheduled_date";O:8:"DateTime":3:{s:4:"date";s:26:"2015-03-23 08:01:00.000000";s:13:"timezone_type";i:1;s:8:"timezone";s:6:"+00:00";}}'));