The PHPBuilder.com site has a new tutorial showing you how to interface PHP with Adobe's Flex functionality and to use remoting to let them "talk".
They dive right in, throwing download links at you and working through setup steps to get your environment up and running. With that out of the way, they show how to get the demo set up that uses their weborb framework.
The end result of the article is a simple Flex/PHP application that pulls information from the database and pushes it into a datagraid for display.