What is Zend Framework?

Zend Framework is a fully object-oriented framework,it is utilizes a lot of object-oriented (OO) concepts like object, class, inheritance and interfaces. Zend Framework components extendable to some point.
It allows developers to implement their own special variations of individual components without having to hack into the ZF codebase itself.

Zend Framework is very simple, straightforward, open-source software framework.
Its strength is in its highly-modular MVC design, making your code more reusable and easier to maintain.

It is building web faster and robust.Created by the company main supporters of PHP, Zend.Supporting web 2.0 and cloud computing technologies.