Online PHP editor | refs for WcVZD

<?php function array_key_exists_recursive($key, array $array, $strict = false) { foreach ($array as $k => $v) { if ($strict && $key === $k) { return true; } else if (!$strict && $key == $k) { return true; } else if (is_array($v)) { return array_key_exists_recursive($key, $v, $strict); } } } $array = Array ( 21 => Array ( ) , 24 => Array ( 22 => Array ( ) , 25 => Array ( 26 => Array ( ) , ) ) ); var_dump(array_key_exists_recursive(22, $array));