3v4l.org

run code in 300+ PHP versions simultaneously
<?php class CbMan { public function fn(callable $cb) { echo $cb(); } } class Pippo { public function yah() { return "hello world"; } } $methods = ['yah']; $cb = [new Pippo(), $methods[0]]; $cbman = new CbMan(); $cbman->fn($cb);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
hello world

preferences:
244.5 ms | 404 KiB | 339 Q