I'm using session SaveHandler to persist session data in the database.

Sample session_data column from the database:

Messenger|a:1:{s:13:"page_messages";a:0:{}}userSession|a:1:{s:7:"referer";s:32:"http://cms.dev/user/profile/view";}Zend_Auth|a:1:{s:7:"storage";O:19:"User_Model_Identity":3:{s:2:"id";s:1:"1";s:8:"username";s:13:"administrator";s:4:"slug";s:13:"administrator";}}

I want to delete Zend_Auth object from this session data.

How can I unserialize those objects and remove object I need?

I suspect, that I don't have to write my custom parser, that Zend_Session already has a method to do this. I have tried different combinations of unserialize but it still returns false.

I'm using autoloader from ZF 1.10.2 and Doctrine 1.2