My php project using Zend framework. i want to generate class diagram for that php(zendframwork). i try to generate class diagram using Bouml project.
I go through this link Boumal java reverse engineering video but problem is when i drag and drop every php class but that don't show relationship between class
You could give UML Lab (http://uml-lab.com) a try (Note: I'm biased as I'm working for Yatta Solutions ;) ). There is a tutorial explaining how to reverse engineer existing source code: http://www.uml-lab.com/en/uml-lab/tutorials/reverse-engineering-tutorial/. Basically, just create a new Model and Class Diagram and all available PHP source files are imported automatically. Otherwise you can import a PHP file by dragging it onto the diagram editor.
The tool supports Java and PHP, and has build-in support for Zend Framework. It may not understand each PHP source file - but files containing a class should work fine. If there is something the tool doesn't understand you'll be notified and can directly file a bug.
It's a commercial tool, but there is a 30 days trial and a free academic edition. If you have any questions don't hesitate asking them in the forum, bug tracker or by mail.