3v4l.org

run code in 500+ PHP versions simultaneously
<?php $arr = [1,2,3]; $reduced = array_reduce($arr, function (&$result, $items) { }, []);
Output for 8.4.1 - 8.4.18, 8.5.0 - 8.5.6
Warning: {closure:/in/CUCvi:4}(): Argument #1 ($result) must be passed by reference, value given in /in/CUCvi on line 4 Warning: {closure:/in/CUCvi:4}(): Argument #1 ($result) must be passed by reference, value given in /in/CUCvi on line 4 Warning: {closure:/in/CUCvi:4}(): Argument #1 ($result) must be passed by reference, value given in /in/CUCvi on line 4
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30
Warning: {closure}(): Argument #1 ($result) must be passed by reference, value given in /in/CUCvi on line 4 Warning: {closure}(): Argument #1 ($result) must be passed by reference, value given in /in/CUCvi on line 4 Warning: {closure}(): Argument #1 ($result) must be passed by reference, value given in /in/CUCvi on line 4
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
preferences:
111.84 ms | 1562 KiB | 4 Q