3v4l.org

run code in 300+ PHP versions simultaneously
<?php function control($f) { $f(); } control(function() {echo 'Hello World!';});
Output for 5.6.38, 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.29, 8.0.0 - 8.0.19, 8.1.0 - 8.1.6
Hello World!

preferences:
60.71 ms | 417 KiB | 13 Q