The NetBeans IDE (with extensions for PHP) has officially added support for the Symfony framework to the latest releases of their software:

Hi all, today I would like to announce that the support for Symfony PHP Framework (as we planned it for NetBeans 6.8) is finished. So, what's new? [...] Existing Symfony projects should be recognized automatically but of course, one can create a new PHP project with Symfony framework. The main support now is the possibility to run Symfony commands.

This post details (with screenshots) some of the enhancements this new release gives including code completion and simpler navigation between views and actions. This code will be coming up in the next release of the IDE - version 6.8 beta.