Some years ago I got an email from an interesting young man named Michael Pham and we discussed PHP IDEs.
I am NOT one of those guys who insist on using a featureless editor to write code (and prove how geeky I am.) I love good IDEs.
For my PHP work I routinely use all the "biggies".
Michael remembered wishing for a commercial quality PHP IDE that was frugally priced when he ws a student - so he wrote one !
He just released the 2008 version and, as with all his new releases, it's packed with new features.
The personal version (last version) is FREE !
The Pro Version is €39
10 Users is €249
Unlimited Site Licence is €499
And the Academic licence for the full version is €29
I hope you'll check it out. Michael originally gave me a free evaluation copy and I liked it so much I paid him for it!