NetBeans 6.1 now suports PHP
Recently was realized new version of popular IDE NetBeans. This new version comes with PHP support - code highlighting, debugging and much more.
The NetBeans IDE is a modular, standards-based, integrated development environment (IDE) written in the Java programming language. The NetBeans project consists of an open source IDE and an application platform, which can be used as a generic framework to build any kind of application.