Abstract function parameter type hint overriding in PHP 7

Question

Is it possible to override an abstract function in PHP 7 with a function in a child class that would narrow down on the accepted argument type?

A word of elaboration

Answer 1

Looks like no pretty solutions so we can try use interfaces.

OR

interface DeliveryTargetAction {}


class AbstractDeliveryTarget {

}

class EmailDeliveryTarget   extends  AbstractDeliveryTarget implements DeliveryTargetAction {

}


abstract class Q {
     abstract protected function action(DeliveryTargetAction $class);
}

class Y extends Q {
    protected function action(DeliveryTargetAction $class){}
}

Depends on what you want to do.