I recently discovered Zend Server and the free Community Edition which I think is a great development. We finally have a standard platform to code against. Not so much in terms of the bundled install of PHP and apache which has been offered for a while; but rather in terms of a standard directory structure, configuration and web-based administration system. More on that later.
Better yet this PHP environment bundle is backed by Zend which means it will stay maintained and likely make it into many corporate environments. It also ships with Zend Framework and PEAR which means it has full native FirePHP support right from the start! If you need another reason it also installs nicely alongside your existing Apache/PHP install without any conflict out of the box. There is really no reason why you cannot run Zend Server in parallel to your existing setup.
I am going to walk you through how you can get FirePHP setup for ZendServer with the help of some glue code. The glue is available from the FirePHP PEAR channel and will be maintained along with FirePHP going forward. At the end of this tutorial you will have FirePHP available automatically for any Apache vhost you configure on your Zend Server.