Zendframework is a easy-to-use, simple, clear-cut, object-oriented, and open-source framework developed by Zend. The php Zend Development Framework supports PHP5 and higher versions for PHP Web Application Development including all the modern databases such as MySQL, SQl Server, Oracle, PostGreSQL etc.

Codeigniter is a highly powerful and cost-effective php framework with a very small footprint, and is built for php coders who want a simple and attractive toolkit for creating full-featured web applications in short span and within your budget.

Yii is an open source web applications development tool kit or framework which offers an authentic Web Application development platform for programmers. This Yii PHP platform creates cost-efficient PHP Web Applications.

Based upon MVC architecture, cakephp framework enables the developers to write less code and boosts rapid web development. It is an open source web application php framework.

Smarty is a web template system or open source framework for PHP, which allows the separation of HTML and CSS from application code. This open source framework is usually used to separate php code and the design template, that enables the developers to change the php coding or design disconnectedly very comfortably.