I find IDE's overwhelming for PHP, and not needed.

When I used Windows I really struggled to find a decent simple editor. I didn't need much else than; navigation, customizeability as well as minimalism. I ended up using Sublime Text, and it was really great. (And pleasing to the eyes)

When I went to Linux, I started using gEdit. But eventually turned to Vim. And here I stop, and I've never looked back to anything. It's really the best editor out there. It's very simple, stable and super customizable. It's pain in the ass in the start, but as you learn to use it - you'll love it.