从php中的匿名函数访问受保护的静态方法？

Question

I have a following problem: in a static method of some class A I define anonymous function within from I want to call another protected static method of the class A. The problem is I need to make it work in php 5.3. Any ideas? Here is a sample code:

class A {
    public static function test() 
    {
        $class = new static;
        $f = function () use ($class) {
            // problem: I need to call static::foo() from here
            return $class::foo();
        };

        print $f();
    }
    protected static function foo() { return 1; }
}

class B extends A {
    protected static function foo() { return 2; }
}

// assuming this will output 2
B::test();

This works in php >= 5.4, but in php 5.3 I get Fatal error: Call to protected method B::foo() from context '' ....

Thanks for any help.