3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $afr = function(&$v) use (&$afr) { if (is_array($v)) { foreach($v as $key=>$val) { if (empty($val)) unset($v[$key]); if (is_array($val)) $v[$key] = $afr($val); } } return $v; }; $a = ['',['',['a', 'b'],'c'],'d']; $b = $a; var_dump($afr($b)); ?><hr><?php var_dump($a);
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
array(2) { [1]=> array(2) { [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 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/VChHV 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/VChHV 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/VChHV on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/VChHV on line 3
Process exited with code 255.