VS.Php 2.0 introduced support for array intellisense. Not only learns about the array entries you have used but also about their types.
If you don't own Visual Studio, don't worry as we are planning to release a standalone version in the near future.
Here is a demo of VS.Php array intellisense support:
http://www.jcxsoftware.com/vsphp/tut...tellisense.htm