test.php

<?php

class Q {
	public function __construct() {
		$this->hej();
	}
}
class B extends Q {
	public function hej() {
		echo "hej ";
	}
	public static function Muh() {
		echo "muh ";
	}
}
class Abe {
	public function __construct() {
		B::Muh();
	}
}
new B();
B::Muh();
new Abe();