Since it's the holiday season now and everybody's making wishes, I wonder - which language features you would wish PHP would have added? I am interested in some practical suggestions/wishes for the language. By practical I mean:

1. Something that can be practically done (not: "I wish PHP would guess what my code means and fix bugs for me" or "I wish any code would execute under 5ms")
2. Something that doesn't require changing PHP into another language (not: "I wish they'd drop $ signs and use space instead of braces" or "I wish PHP were compiled, statically typed and had # in it's name")
3. Something that would not require breaking all the existing code (not: "Let's rename 500 functions and change parameter order for them")
4. Something that does change the language or some interesting aspect of it (not: "I wish there was extension to support for XYZ protocol" or "I wish bug #12345 were finally fixed")
5. Something that is more than a rant (not: "I wish PHP wouldn't suck so badly")

Anybody has any good wishes?

Mod edit: Stanislav Malyshev is a core PHP developer.