3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?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 7.0.0 - 7.1.0
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 hhvm-3.10.0 - 3.12.0
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(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 - 5.6.28
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 - 5.2.17
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 - 4.4.1, 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.