Online PHP editor | refs for Od72V

@ 2018-07-04T23:24:21Z

<?php

interface A {
	function m(B $s): self;
}

class B implements A {
	function m(self $s): parent {
		return $this;
	}
}

class C extends B {
	function m(parent $s): A {
		return $this;
	}
}

$c = new C();
$r = $c->m($c);
var_dump($r instanceof C);