its has many extensions. but the documentation complicated so newbiees stay away. till you learn php well
nice framework well featured cli model generations a big plus
worked with this excellent. documentation awesome
ZF. Best design and fully supported by pro developers.
Codeigniter best framework, before I was trying cakePHP but it was too tricky to develop with..
ZF has IBM and The Zend Company (Official PHP Company) behind it...Zend Framework is a serious MVC framework and the preferred solution for enterprise solutions.
Easy to learn, has very clean and short syntax, lightweight, not bloated, flexible and easy to extend.