Easy easy easy: how to have php syntax coloring in emacs.
Download the latest version of php-mode. Copy php-mode.el inside your site-lisp directory (on windows could be C:\program files\emacs<version>\site-lisp and the update your .emacs file adding the following lines
You will need font-lock enabled. For many information look inside the source file (the comments explain more settings) and for an example .emacs file you can refer to mine.