3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface Fooable { function foo(array $f = null); } interface StrictFoo extends Fooable { function foo(array $f = array()); }
Output for 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: Declaration of StrictFoo::foo(array $f = []) must be compatible with Fooable::foo(?array $f = null) in /in/XY8Bi on line 8
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Fatal error: Declaration of StrictFoo::foo(array $f = Array) must be compatible with Fooable::foo(?array $f = NULL) in /in/XY8Bi on line 8
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Declaration of StrictFoo::foo(array $f = Array) must be compatible with Fooable::foo(?array $f = NULL) in /in/XY8Bi on line 7
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
preferences:
263.57 ms | 402 KiB | 332 Q