$iterable * @param iterable $keys * * @return array */ function select_keys(iterable $iterable, iterable $keys): array { $array = []; foreach ($iterable as $k => $v) { $array[$k] = $v; } $result = []; foreach ($keys as $key) { if (Iter\contains_key($array, $key)) { $result[$key] = $array[$key]; } } return $result; }