Daniel Cousineau has a new blog post showing off a plugin he's made for Zend Framework applications that allows you to run a script before each controller.
Recently at work I had the need to run a script before every single controller (namely to add a plugin folder to Dwoo) for a specific module that I did not desire for any other modules. I could have subclassed all my controllers to extend a custom action controller that handled this in the init() method, however I'm lazy so I wrote a quick Zend Controller Plugin to handle this for me.
The plugin actually runs when the routeShutdown method is used (after the routing is done, but before the controller is called) and pulls in the contents of the specified file and executes it like the code was already embedded. Complete code is included.