3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $array = [ 1 => [ 1 => [ 'anna', 'alice' ], 2 => [ 'bob', 'bartold' ] ], 2 => [ 1 => [ 'carol' ], 2 => [ 'david' ] ] ]; $result = []; $currentIndex = 1; $increment = 0; array_walk_recursive($array, function($value, $key) use (&$result, &$currentIndex, &$increment) { if (!is_array($value)) { $result[$currentIndex][] = $value; if ($increment == 1) { $currentIndex++; $increment = 0; } else { $increment++; } } }); var_dump($result);
based on TSFQF
Output for 5.4.0 - 7.2.0
array(3) { [1]=> array(2) { [0]=> string(4) "anna" [1]=> string(5) "alice" } [2]=> array(2) { [0]=> string(3) "bob" [1]=> string(7) "bartold" } [3]=> array(2) { [0]=> string(5) "carol" [1]=> string(5) "david" } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/t7H82 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 '[' in /in/t7H82 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/t7H82 on line 3
Process exited with code 255.