On the EasyTech blog, there's a recent post for Zend Framework developers out there working with the Oracle database showing how to execute PL/SQL code from your Zend_Db queries.

Calling PL/SQL code from PHP can be tricky sometimes, specially when the PL/SQL procedure has input and output parameters. In this posting I will show you how to call a procedure from the PHP using Zend Framework. I will assume you have some experience using Zend Framework, specially the Database module (Zend_db).

He walks through the creation of a simple PL/SQL stored procedure and how to prepare your query to get results out of it (Zend_Db_Statement_Oracle and an execute call). There's a few stipulations you'll need to follow - named parameters, reserving space for the output and using references for output variables.