The current stable php version is 5.5.1. At Eclipse PDT we're however still stuck on 5.4. I tried updating it to the latest version but it doesn't give me any new updates. In preferences - > PHP -> PHP Intepreter I can only select 5.4 or lower. How can I update PDT to make it interpret php 5.5?
The Luna release has 5.5 support.
Development has slowed though. See: http://projects.eclipse.org/projects/tools.pdt
There are still some commits happening https://eclipse.googlesource.com/pdt/org.eclipse.pdt/ but PDT's functionality has fallen far behind PHPStorm's.
- Edited to note that Luna has support