3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class A { public function foo(C $c) {} } class B extends A { public function foo(D $d) {} } class C {} class D {}
Output for 7.0.0 - 7.1.0
Warning: Declaration of B::foo(D $d) should be compatible with A::foo(C $c) in /in/kZ4Z0 on line 11
Output for hhvm-3.12.0
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.6.28
Strict Standards: Declaration of B::foo() should be compatible with A::foo(C $c) in /in/kZ4Z0 on line 11
Output for 5.0.0 - 5.3.29
Strict Standards: Declaration of B::foo() should be compatible with that of A::foo() in /in/kZ4Z0 on line 11
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/kZ4Z0 on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/kZ4Z0 on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/kZ4Z0 on line 5
Process exited with code 255.