After a few years pause the Eclipse for PHP Developers package is back with the Luna M4 milestone of the Eclipse Simultaneous Release.
The package assembles the PHP Development Tools (PDT), the JavaScript Development Tools (JSDT), HTML, CSS and XML editors, and productivity tools like EGit and Mylyn. It is one of the easiest way to start using PDT for developing PHP applications.
The package can be downloaded from the Developer Builds section on the Eclipse Downloads page: http://eclipse.org/downloads/index-developer.php