3v4l.org

run code in 300+ PHP versions simultaneously
<?php $host = "https://chat.stackoverflow.com/rooms/11/php/"; $currentDomain = preg_replace('(^.+\.(?=[^.]+\.[^.]+$))', '', $host); echo $currentDomain;
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
stackoverflow.com/rooms/11/php/
preferences:
107.46 ms | 1401 KiB | 4 Q