PHP: polymorphic abstract static methods

I'm trying to do something like this but i don't succeed.

开发者_C百科

abstract class Animal 
{ 
    abstract static function getName();
    static function sayName() { echo self::getName(); }
}

thanks!

---

You have two problems:

1. static functions can't be abstact in php anymore.
2. As said before, late static binding: as method getName() is defined in child class, you need to access it with static::getName() instead of self::getName()

---

It would have been nice if you'd have given a hint as to how you "don't succeed", but I suppose you're stumbling across static bindings and need to use late static bindings introduced in PHP 5.3.

---

My guess is maybe you are trying to instantiate an object from that class.

You can't. It is an abstract class. Subclass it, and then instantiate that.

---

That will not succeed- you cannot have an abstract static function. See the accepted answer Why does PHP 5.2+ disallow abstract static class methods? for details on why.