How to debug php scripts?

Ran into this question, I would like Zend Server, but there is no key to it.

Or is there any way to connect Zend Studio to Denver or another local web server?

Answer 1, authority 100%

Zend Server Community Edition:

It is completely free, and you can use it in development, testing and production.

Additionally: PHP Console, FirePHP, XDEBUGHow To Setup.

Answer 2, authority 50%

I’m using phpDesigner, love it. I tried everything from dreamweaver to zend, I chose phpDesigner.

Answer 3

I’m working on the simplest solution – to build a proof of conformity with an autoprover (Coq, Agda2, Epigram).