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run code in 200+ php & hhvm versions
Bugs & Features
<?php class A {} class B extends A {} class C extends A{} class D { function test(A $a) { var_dump($a); } } $b = new B; $c = new C; $d = new D; $d->test($b);
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0beta1
object(B)#1 (0) { }