3v4l.org

run code in 300+ PHP versions simultaneously
<?php function demo(): void { return; } var_dump( demo() );
Output for 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.22, 8.4.1 - 8.4.8
NULL
preferences:
42.63 ms | 406 KiB | 5 Q