I'm using PDT, but want to switch to any lightweit editor. First I want to try Textmate. Eclipse has several useful features:
Does Textmate provide this features, or is there bundles to get such functional?
You can get auto completion in TextMate for PHP using the tm-completion bundle. In doesn't work anything as good as what you might see in other IDEs like Eclipse or Visual Studio, xCode. But is works.
Standard PHP completion is supported. See the PHP Bundle -> Support -> Help