3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php /** * @legacy */ interface A { function foo($x = NULL); } interface B extends A { function foo(); }
Output for 5.4.0 - 5.6.28, 7.0.0 - 7.1.0
Fatal error: Declaration of B::foo() must be compatible with A::foo($x = NULL) in /in/IiR3r on line 10
Process exited with code 255.
Output for 5.3.9 - 5.3.29, hhvm-3.10.0 - 3.12.0
Fatal error: Declaration of B::foo() must be compatible with that of A::foo() in /in/IiR3r on line 10
Process exited with code 255.
Output for 5.0.0 - 5.3.8
Fatal error: Can't inherit abstract function A::foo() (previously declared abstract in B) in /in/IiR3r on line 10
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/IiR3r on line 6
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 in /in/IiR3r on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/IiR3r on line 6
Process exited with code 255.