Zend Framework and PHPBB Integration

The task I am trying to do is to integrate PHPBB with our existing Zend Framework-based web p开发者_开发技巧ortal. Right now, the registration works by auto-creating accounts both on the framework and PHPBB once a user registers. This feature already works. The next task is to make the user login and logout process simultaneous on both parts. This would mean that I have to have access to Zend's session from inside PHPBB. Once I get this done, everything else will come to light. Right now I'm totally stucked coz the $_SESSION variable is not accessible.

Can anybody point me how to accomplish this? A huge thanks to everyone in advanced.

---

Since this is quite impossible, one of the few solutions that work is to explicitly save the values of the session to a table. Other solutions of course is possible.