Access child class static variables from parent class?

Question

I have a base class that I need to call functions on a class that is referenced in the child class.

Easy enough,

class base_class {

    public function          


        

Answer 1

Provide a way for the parent to access the child's static member:

reference()->doSomething();
    }
}

class extended_class extends base_class{
    protected static $reference;

    public function __construct($ref){
        self::$reference = $ref;
    }

    protected function reference(){
        return self::$reference;
    }
}

class ref {
    public function doSomething(){
        echo __METHOD__;
    }
}

$ref = new ref();
$ec = new extended_class($ref);
$ec->doSomethingWithReference();

print_r($ec);
?>