3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class C{} class D extends C{} interface iA{ public function m(C $obj); } class A implements iA{ public function m(C $obj) { $b =2; } } class B implements iA{ public function m(D $obj) { $a = 1; } }
Output for 7.0.0 - 7.2.0
Fatal error: Declaration of B::m(D $obj) must be compatible with iA::m(C $obj) in /in/E1Gl5 on line 17
Process exited with code 255.
Output for 5.4.1 - 5.6.28
Fatal error: Declaration of B::m() must be compatible with iA::m(C $obj) in /in/E1Gl5 on line 17
Process exited with code 255.
Output for 5.3.18 - 5.3.29
Fatal error: Declaration of B::m() must be compatible with that of iA::m() in /in/E1Gl5 on line 17
Process exited with code 255.