It pains me to say this but when it comes to PHP development on OSX over a Samba connection then Zend Studio is the way to go. The main problem with TextMate is that when editing files over a Samba connection the application will pause for a few seconds when it received focus. As a web developer I'm constantly switching from browser and editor so those few seconds add up over the course of a day.

The TextMate guy (I forget his name right now) has promised a fix at some point in the future. I hope it comes sooner rather than later because I would love to be able to use TextMate for all of my everyday work.

Still Zend Studio is a great PHP editor and should fill-in quite nicely for TextMate in the meantime. Gotta love that "Go To Declaration" command.