3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo $undefined_variable ?? 1; echo $arr[7] ?? 2; echo $object->property ?? 3; echo null ?? 4; echo "" ?? 5; echo 0 ?? 6;
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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
12340
Output for 5.6.0 - 5.6.40
Parse error: syntax error, unexpected '?' in /in/Zijss on line 3
Process exited with code 255.
preferences:
183.85 ms | 401 KiB | 292 Q