3v4l.org

run code in 300+ PHP versions simultaneously
<?php $input = [1, 2]; var_dump(array_filter($input, function(& $value) { if ($value % 2 === 0) { return false; } $value++; return true; }));
Output for 8.4.1 - 8.4.13
Warning: {closure:/in/Z2HnL:4}(): Argument #1 ($value) must be passed by reference, value given in /in/Z2HnL on line 4 Warning: {closure:/in/Z2HnL:4}(): Argument #1 ($value) must be passed by reference, value given in /in/Z2HnL on line 4 array(1) { [0]=> int(1) }
Output for 8.2.0 - 8.2.29, 8.3.0 - 8.3.26
Warning: {closure}(): Argument #1 ($value) must be passed by reference, value given in /in/Z2HnL on line 4 Warning: {closure}(): Argument #1 ($value) must be passed by reference, value given in /in/Z2HnL on line 4 array(1) { [0]=> int(1) }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33
Warning: {closure}(): Argument #1 ($value) must be passed by reference, value given in /in/Z2HnL on line 10 Warning: {closure}(): Argument #1 ($value) must be passed by reference, value given in /in/Z2HnL on line 10 array(1) { [0]=> int(1) }
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
array(1) { [0]=> int(1) }
Output for 5.6.0 - 5.6.40
array(1) { [0]=> int(2) }
preferences:
149.84 ms | 411 KiB | 5 Q