static_or_self.php

<?php
// sources: http://stackoverflow.com/a/4719222
class A {
    public static function className(){
        echo __CLASS__;
    }

    public static function test(){
        self::className();
    }
}

class B extends A{
    public static function className(){
        echo __CLASS__;
    }
}

B::test(); //A

class A {
    public static function className(){
        echo __CLASS__;
    }

    public static function test(){
        static::className();
    }
}

class B extends A{
    public static function className(){
        echo __CLASS__;
    }
}

B::test(); // B