Library with use-at-will architecture that extends the functionality of Zend Framework 1. Main features: Improved bootstrapping with lazy loading of resources, declaration of request parameters as argument in controller actions, advanced form creation and validation, mail templates, lightweight controller testing.
The Composer configuration states that PHP 5.2 is required, but the required PHP version should be set to 5.3, as said in the readme file.
There are some features that require 5.3 (for example some reflection functionalities).