3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a="AIUEO"; echo $a;
Output for 8.1.0 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
AIUEO

preferences:
36.22 ms | 407 KiB | 5 Q