3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { function foo(callable $fn): void { $fn(); } function a() { $this->foo(function () { echo "yo"; }); } function b() { $this->foo(static function () { echo "yo"; }); } }
Output for 8.2.27 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.15, 8.5.0

preferences:
44.54 ms | 406 KiB | 5 Q