3v4l.org

run code in 300+ PHP versions simultaneously
<?php $_SERVER = null; var_dump($_SERVER);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
NULL
preferences:
93.77 ms | 402 KiB | 62 Q