3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a="AIUEO"; echo $a;
Output for 8.1.0 - 8.1.30, 8.2.0 - 8.2.24, 8.3.0 - 8.3.12
AIUEO

preferences:
48.45 ms | 406 KiB | 5 Q