I'm at work atm so I cant post my home dev environment, but heres the ones i use at work:
Vim Debian Linux 4.0 stable running Xfce 4


And my Windows XP workstation:

Eclipse PDT

I do prefer Vim over eclipse mainly for the multiple buffers and the ability to spit the screen (as show above), but eclipse is useful to debug and the autocomplete for PHP functions is good too etc.

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mysql> SELECT * FROM `users` WHERE `users`.`clue` > 0;
Empty set (0.00 sec)