Matthew Weir O'Phinney has created his own modules that he shares in this post today - one to manage the config data for the application and another to act as a bridge between the scripts and that configuration store.
I often find myself needing a configuration module of some sort -- for storing application parameters, bootstrapping, template variables, what have you. The problem, however, is: once I bring them into my project, how can I access them? Better yet, would there be a way to bring in configurations of many types and still access them all in the same way?
He looked into several of the methods out there, but wasn't pleased with any of them - so he created his own, the Phly_Struct and Phly_Config modules. He talks briefly about what they are, but gets quickly into the code examples to prove their worth. It's a basic example tying the two of them together and loading some simple values into an instance of the Phly_Config. Both are available from the PHLY: PHP Library PEAR channel.