3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [a, s, d, '', a, s, d, '', a, s, d, '',]; print_r(array_filter($arr));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Undefined constant "a" in /in/CGvf0:3 Stack trace: #0 {main} thrown in /in/CGvf0 on line 3
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/CGvf0 on line 3 Warning: Use of undefined constant s - assumed 's' (this will throw an Error in a future version of PHP) in /in/CGvf0 on line 3 Warning: Use of undefined constant d - assumed 'd' (this will throw an Error in a future version of PHP) in /in/CGvf0 on line 3 Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/CGvf0 on line 3 Warning: Use of undefined constant s - assumed 's' (this will throw an Error in a future version of PHP) in /in/CGvf0 on line 3 Warning: Use of undefined constant d - assumed 'd' (this will throw an Error in a future version of PHP) in /in/CGvf0 on line 3 Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/CGvf0 on line 3 Warning: Use of undefined constant s - assumed 's' (this will throw an Error in a future version of PHP) in /in/CGvf0 on line 3 Warning: Use of undefined constant d - assumed 'd' (this will throw an Error in a future version of PHP) in /in/CGvf0 on line 3 Array ( [0] => a [1] => s [2] => d [4] => a [5] => s [6] => d [8] => a [9] => s [10] => d )
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Notice: Use of undefined constant a - assumed 'a' in /in/CGvf0 on line 3 Notice: Use of undefined constant s - assumed 's' in /in/CGvf0 on line 3 Notice: Use of undefined constant d - assumed 'd' in /in/CGvf0 on line 3 Notice: Use of undefined constant a - assumed 'a' in /in/CGvf0 on line 3 Notice: Use of undefined constant s - assumed 's' in /in/CGvf0 on line 3 Notice: Use of undefined constant d - assumed 'd' in /in/CGvf0 on line 3 Notice: Use of undefined constant a - assumed 'a' in /in/CGvf0 on line 3 Notice: Use of undefined constant s - assumed 's' in /in/CGvf0 on line 3 Notice: Use of undefined constant d - assumed 'd' in /in/CGvf0 on line 3 Array ( [0] => a [1] => s [2] => d [4] => a [5] => s [6] => d [8] => a [9] => s [10] => d )
preferences:
239.45 ms | 404 KiB | 330 Q