3v4l.org

run code in 300+ PHP versions simultaneously
<?php foreach (array('_SESSION', '_COOKIE') as $t) { if (isset($$t['v'])) { return $$t['v']; } }
Output for 7.0.0 - 7.0.20, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Output for 5.4.8 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Warning: Illegal string offset 'v' in /in/dYWvB on line 4 Warning: Illegal string offset 'v' in /in/dYWvB on line 4
preferences:
180.44 ms | 402 KiB | 222 Q