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, $baz) {} }
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.14
Fatal error: Declaration of R::foo($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.
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78.14 ms | 407 KiB | 5 Q