3v4l.org

run code in 500+ PHP versions simultaneously
<?php function x(Container $a): Container { return "A"; }
Output for 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
preferences:
44.51 ms | 696 KiB | 4 Q