Sorry, but I write my programs in Winbugs altought just to upload them to the real server, and the best editor I've found arround FOR PHP PROGRAMING is PHPed, wich colorcode is almost perfect and has a lot of helpfull things for the PHP programmer like help in tooltips, just press F1 and get the PHP manual page for that command, built in FTP (sorry, without proxy) to edit files from your server on the fly, you can sincronize your local files with the server's and now it has a program monitor if you have installed PHP on your win machine etc etc.
It also do it well to edit perl, C, Mysql, but it's main target is PHP files.
Belive it or not last versions has more bugs (after all is an alfa version), but you can grab an older one from http://www.soysal.com
Me and our team of programers are fans of PHPed, and did I forget to mention that it's free?