Late static binding in PHP 5.3: The difference between self:: and static::

test_static.php

<?php

class MyBase
{
    public static function myMethod()
    {
        return 'Called MyBase::myMethod()';
    }

    public static function doSomethingSelf()
    {
        return self::myMethod();
    }

    public static function doSomethingStatic()
    {
        return static::myMethod();
    }
}

class MyChild extends MyBase
{
    public static function myMethod()
    {
        return 'Called MyChild::myMyMethod()';
    }
}

function o($s)
{
    echo $s . PHP_EOL;
}

o(MyChild::doSomethingSelf());
o(MyChild::doSomethingStatic());