3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface X { function method(A $a); } interface Y { function method(B $a); } class Z implements X, Y { function method(A $a){} }
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Could not check compatibility between Z::method(A $a) and Y::method(B $a), because class B is not available in /in/kF7m2 on line 9
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Declaration of Z::method(A $a) must be compatible with Y::method(B $a) in /in/kF7m2 on line 8
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Declaration of Z::method() must be compatible with Y::method(B $a) in /in/kF7m2 on line 8
Process exited with code 255.
Output for 5.3.9 - 5.3.29
Fatal error: Declaration of Z::method() must be compatible with that of Y::method() in /in/kF7m2 on line 8
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.8
Fatal error: Can't inherit abstract function Y::method() (previously declared abstract in X) in /in/kF7m2 on line 8
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/kF7m2 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/kF7m2 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/kF7m2 on line 3
Process exited with code 255.

preferences:
263.53 ms | 401 KiB | 329 Q