3v4l.org

run code in 500+ PHP versions simultaneously
<?php fwrite(STDOUT, 'Hello'); ini_set('session.name', 'SID'); fwrite(STDOUT, "\n" . ini_get('session.name'));
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
Hello SID
preferences:
32.38 ms | 1137 KiB | 7 Q