PHP Frameworks

CakePHP

Cakephp - http://cakephp.org/
Cakephp Tutorials - http://bakery.cakephp.org/


Symfony

Symfony Project - http://www.symfony-project.org/
Symfony Framework Book Online -The Definitive Guide to symfony
http://www.sensiolabs.com/books


Zend Framework

Zend Framework - http://framework.zend.com/
Zend Framework Tutorials - http://devzone.zend.com/
Free Online Book - http://www.survivethedeepend.com/
Create a modular application with Zend Framework
Setup a Zend framework application using Zend_Application along with PHPUnit
Blog Tutorial using Zend Framework 1.9
Starting with Zend Framework
Blog articles on Zend Framework by Alex
Zend Framework Architecture
Book Review - Zend Framework Application Development
Online Resources for Zend Framework

Code Igniter

CodeIgniter Web Site
CodeIgniter Video Tutorials
List of CodeIgniter Tutorials and Resources