Online PHP editor | refs for 0ddOM

<?php $array = array( 'a' => 'a', 'b' => null, 'c' => array( 'a' => null, 'b' => 'b', ), 'd' => array( 'a' => null ) ); $result = array_walk_recursive_delete($array); echo"<pre>"; print_r($result); echo"<pre>"; function array_walk_recursive_delete(array $array) { foreach ($array as $key => $value) { if (is_array($value)) { $value = array_walk_recursive_delete($value); } if ($value == null) { unset($array[$key]); } } return $array; }