k4st

class Mammal {	public $eyes = TRUE;}class Dog extends Mammal {	public $fur = TRUE;}class Lassie extends Dog {	public $cute = true;}function getDog($type) {	$class = !class_exists($type) ? 'Dog' : $type;		return new $class;}$lassie = getDog('Lassie'); // instance of Lassie$spot = getDog('Spot'); // instance of Dog