I think that already having experience with RoR and PHP, you have already violated the task. RoR follows the same architecture pattern as the Zend Framework (MVC); and therefore you will already have an abstract understanding of your first Zend Framework application.
I donβt know of any resources that are specifically designed for the transition of RoR programmers to Zend Framework programmers (which would make a good topic for the book), however, with (at least) syntactic understanding of PHP, d we recommend reading one of the following articles:
S.O. !