<?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);
Fatal error: Cannot use "parent" when current class scope has no parent in /in/Od72V on line 8
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Deprecated: Cannot use "parent" when current class scope has no parent in /in/Od72V on line 8
Fatal error: Could not check compatibility between B::m(B $s): parent and A::m(B $s): A, because class parent is not available in /in/Od72V on line 8
Process exited with code 255.
Output for 7.2.19 - 7.2.33, 7.3.6 - 7.3.33
Fatal error: Declaration of B::m(B $s): parent must be compatible with A::m(B $s): A in /in/Od72V on line 7
Process exited with code 255.
Output for 7.2.0 - 7.2.18, 7.3.0 - 7.3.5
Fatal error: Declaration of C::m(B $s): A must be compatible with B::m(B $s): parent in /in/Od72V on line 13
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Fatal error: Declaration of C::m(B $s): A must be compatible with A::m(B $s): A in /in/Od72V on line 13
Process exited with code 255.