Wow, that's a great resource TeraTask!
I just looked a glace about PHP6 from the link, it seems that it will have a little bit of change in the class declaration, and it supports inheritance (more like a real language instead of scripting language!)
PHP Code:
class A {
static function staticA() { static::static2(); }
static function static2() { echo "A::static2\n";}
}
class B extends A {
static function static2() { echo "B::static2\n"; }
}
B::staticA();