Open Source/Free PHP Editors?

I know there are a few out there…any recommendations from anyone? I was wondering, I know a lot of PHP Editors have the code hint thingy, but are there any that do that lovely thing flash does when for instance you type in for( as soon as you hit the ( a little hint comes up that says something like

for(initiate; condition; increment){

you know, it tells you the syntax you should use for the for function, and boldens the current bit you should enter in…that is so handy…I wish more php editors did that.