Zend Server

To start with, Zend Server is one of the cheapest solutions ever as the standard costs only $240 but it includes implacable variety of extensions and is fully compatible with all PHP codes - any PHP will run on it. Another great benefit is the fact it suits for all OS, including even Linux.

The only real issue I have with the software is the overly expensive training. To imagine the amount of money paid for the service doesn't even reach that high, I really don't feel comfortable paying such a high price for training, even though it is useful. I wouldn't mind if the software itself would be pricier and training cheaper, but at this point it just feels crazy.

Zend's suite provides nice assets for PHP coding, even if you are a starter as they have in-depth tutorials and training options so you'd get handy. On one part it is a cheap solution but on the other hand the price paid for training is in my opinion too high so in the end it depends on your personal preference.