3v4l.org

run code in 300+ PHP versions simultaneously
<?php trait T { abstract function foo($bar); } abstract class A { use T; } class R extends A { function foo($bar, $baz) {} }
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
Fatal error: Declaration of R::foo($bar, $baz) must be compatible with A::foo($bar) in /in/ouO0R on line 12
Process exited with code 255.
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33
Fatal error: Declaration of R::foo($bar, $baz) must be compatible with A::foo($bar) in /in/ouO0R on line 11
Process exited with code 255.
preferences:
96.23 ms | 407 KiB | 5 Q