Yii: PHP5 Web Programming Framework

Yii [1] (BSD License) is a high-performance [2] component-based PHP framework for developing large-scale Web applications. Yii comes with a full stack of features needed by today's Web 2.0 application development. It is written in strict OOP and is easy to learn with its detailed tutorials. And its highly reusable components allows one to rapidly build up a Web application that is efficient as well as robust.

[1] http://www.yiiframework.com/ [2] http://www.yiiframework.com/performance/