3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array(); $array[] = 1; $array['type'] = 2; $array['number'] = 3; echo $array['none'];
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined array key "none" in /in/J6tL3 on line 7
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Notice: Undefined index: none in /in/J6tL3 on line 7

preferences:
302.29 ms | 403 KiB | 411 Q