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run code in 300+ PHP versions simultaneously
<?php $empty = function(&$v) use (&$empty) { if (is_array($v)) { $v = array_filter($v, $empty); } elseif (!empty($v)) { $v = $v . 'modified'; } return !empty($v); }; $a = ['',['',['a', 'b'],'c'],'d']; $b = $a; var_dump(array_filter($b, $empty)); ?><hr><?php var_dump($a);
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
Warning: {closure}(): Argument #1 ($v) must be passed by reference, value given in /in/irv2H on line 18 Warning: {closure}(): Argument #1 ($v) must be passed by reference, value given in /in/irv2H on line 18 Warning: {closure}(): Argument #1 ($v) must be passed by reference, value given in /in/irv2H on line 7 Warning: {closure}(): Argument #1 ($v) must be passed by reference, value given in /in/irv2H on line 7 Warning: {closure}(): Argument #1 ($v) must be passed by reference, value given in /in/irv2H on line 7 Warning: {closure}(): Argument #1 ($v) must be passed by reference, value given in /in/irv2H on line 7 Warning: {closure}(): Argument #1 ($v) must be passed by reference, value given in /in/irv2H on line 7 Warning: {closure}(): Argument #1 ($v) must be passed by reference, value given in /in/irv2H on line 18 array(2) { [1]=> array(3) { [0]=> string(0) "" [1]=> array(2) { [0]=> string(1) "a" [1]=> string(1) "b" } [2]=> string(1) "c" } [2]=> string(1) "d" } <hr>array(3) { [0]=> string(0) "" [1]=> array(3) { [0]=> string(0) "" [1]=> array(2) { [0]=> string(1) "a" [1]=> string(1) "b" } [2]=> string(1) "c" } [2]=> string(1) "d" }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
array(2) { [1]=> array(3) { [0]=> string(0) "" [1]=> array(2) { [0]=> string(1) "a" [1]=> string(1) "b" } [2]=> string(1) "c" } [2]=> string(1) "d" } <hr>array(3) { [0]=> string(0) "" [1]=> array(3) { [0]=> string(0) "" [1]=> array(2) { [0]=> string(1) "a" [1]=> string(1) "b" } [2]=> string(1) "c" } [2]=> string(1) "d" }
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
array(2) { [1]=> array(2) { [1]=> array(2) { [0]=> string(9) "amodified" [1]=> string(9) "bmodified" } [2]=> string(9) "cmodified" } [2]=> string(9) "dmodified" } <hr>array(3) { [0]=> string(0) "" [1]=> array(2) { [1]=> array(2) { [0]=> string(9) "amodified" [1]=> string(9) "bmodified" } [2]=> string(9) "cmodified" } [2]=> string(9) "dmodified" }
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/irv2H on line 16
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/irv2H on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/irv2H on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/irv2H on line 3
Process exited with code 255.
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