3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class Request {} class JsonRequest extends Request{} interface Specific { public function middle(JsonRequest $r); } class Generic implements Specific { public function middle(Request $r){} }
based on NBLpX
Output for 7.1.0 - 7.3.0alpha1
Fatal error: Declaration of Generic::middle(Request $r) must be compatible with Specific::middle(JsonRequest $r) in /in/EXjNv on line 10
Process exited with code 255.
Output for hhvm-3.22.0
Fatal error: Uncaught Error: Declaration of Generic::middle() must be compatible with that of Specific::middle() in /in/EXjNv:-1 Stack trace: #0 {main}
Process exited with code 255.
Output for hhvm-3.18.5 - 3.21.3
Fatal error: Uncaught Error: Declaration of Generic::middle() must be compatible with that of Specific::middle() in /in/EXjNv:10 Stack trace: #0 {main}
Process exited with code 255.
Output for 5.6.0 - 5.6.30
Fatal error: Declaration of Generic::middle() must be compatible with Specific::middle(JsonRequest $r) in /in/EXjNv on line 10
Process exited with code 255.