How to uninstall CLI PHP5

[BinarySpike]

Sorry for posting so close together, however, I accidentally did "emerge -av php"

This installed the cli version of php5 and I can't figure out how to set it up in apache2.

How do I uninstall PHP? (or at least, I added -D PHP but I don't know where to add, AddType .php so that apache2 will execute it)

[BinarySpike]

I just figured out that I can do:
emerge -av unmerge php

However, I can't get this command to work (no ebuilds to satisfy)
USE="cli apache2" emerge '=dev-lang/php-4*'

Basically my problem is I needed to add the apache2 USE flag the first time I emerge'd PHP, however I prefer coding in PHP4 so now I know how to get it, but it isn't working lol.

I have been following steps in:
Gentoo Linux Documentation -- Upgrading PHP