There is an interesting article up today about what major changes will be made in the upcoming release of PHP V6. Most of the changes won’t affect anybody developing with the current standards established with recent PHP V5 releases
Namespaces – Should be great for integrating libraries with third party code.
Soap – Now Standard instead of an optional compile-in feature.
XML – Now Standard instead of an optional compile-in feature.
These items are going to make a lot of standard open-source apps fall apart.