There are too many frameworks. Here is a quick reference list:

Cake

• CakePHP makes building web applications simpler, faster and require less code.
• http://cakephp.org/

CodeIgniter

• CodeIgniter is a proven, agile & open PHP web application framework with a small footprint. It is powering the next generation of web apps.

• http://ellislab.com/codeigniter

Flow/Typo3

• TYPO3 Flow is a web application platform enabling developers creating excell ent web solutions and bring back the joy of coding.*Being re-written.http://flow.typo3.org/

FuelPHP

• FuelPHP is a simple, flexible, community driven PHP 5.3+ framework, based on the best ideas of other frameworks, with a fresh start!

• http://fuelphp.com/

Kohana

• An elegant HMVC PHP5 framework that provides a rich set of components for building web applications.*http://kohanaframework.org/

Laravel

• The PHP framework for web artisans.

• Not really DI, has plugins instead. You don\'t import it as a dependency, you \'composer --create-app\'http://laravel.com/

Nette

• A popular tool for PHP web development. It is designed to be the most usable as possible and is definitely one of the safest one. It speaks your language and helps you to easily build better websites.*http://nette.org/

Peej Tonic

• Tonic is an open source less is more, RESTful Web application development PHP library designed to do things "the right way", where resources are king and the library gets out of the way and leaves the developer to get on with it.
• http://peej.github.io/tonic/

Phalcon

• Phalcon is a web framework implemented as a C extension offering high performance and lower resource consumption.
• http://phalconphp.com/

Pines Framework

Looks like it\'s focused on applications not just websites.http://pinesframework.org/

Qcodo

Code Less. Do More. Antique framework, looks like it was pushed heavily years ago, now abandoned.http://www.qcodo.com/

Silex

It's Symfony without Symfony's structurehttp://silex.sensiolabs.org/

Silverstripe

*Easy to use CMS for website editors *More a CMS than a web framework.http://www.silverstripe.org/

Slim Framework

• Slim is a PHP micro framework that helps you quickly write simple yet powerful web applications and APIs.

• http://www.slimframework.com/

Symfony

Symfony: High Performance PHP Framework for Web Developmenthttp://symfony.com/

Yaf

PHP Framework in PHP extensionhttp://pecl.php.net/package/yafhttp://www.yafdev.com/Yii===Uses ActiveRecord style ORM in controllers.Hasn\'t discovered namespaces yet.
Netscape style error detected \"Yii 2 will be full rebuilt on top of PHP 5.3.0+ and is aimed to become a state-of-the-art of the new generation of PHP framework. Yii 2.0 will not be compatible with 1.1. \"http://www.yiiframework.com/

Zend

Me gusta - though a bit complicated and has the magic strings everywhere.http://www.zend.com/

Zentao

Looks like a very popular Chinese framework.http://www.zentao.net/en/https://github.com/easysoft/zentaophp