3v4l.org

run code in 500+ PHP versions simultaneously
<?php function x(Container $a): Container { return "A"; }
Output for 8.2.31 - 8.2.32, 8.3.0 - 8.3.33, 8.4.1 - 8.4.24, 8.5.0 - 8.5.9
preferences:
56.63 ms | 770 KiB | 4 Q