Online PHP editor | refs for t7H82

<?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);