In April, I mentioned that you could develop PHP in NetBeans 6.1. But at this writing, the plugin required has been quietly removed from NetBeans update/plugin centers. The search I describe in the article will only yield a jMaki plugin. This is disappoining because PHP developers would have liked using the scripting plugin for its pure orientation to PHP than jMaki that's a Java-oriented feature.
The plugin is not available for 6.1, but may be found for 6.0. Here's one reason to keep an older IDE around!