PHP 5.3
The Eclipse and PHP communitites grow together. When one makes a change, the other takes a consequent action.
When PHP announced it was going to deliver a new major version, Eclipse PHP Development Tools (PDT) reacted with an early that supports the new PHP 5.3 language features.
Project Management The New PHP Project Wizard (available from the File | New menu) now has the additional option of projects supporting PHP 5.3