$form_arrival_city = filter_input(INPUT_POST, "arrival_city", FILTER_SANITIZE_STRING);
$form_arrival_date = filter_input(INPUT_POST, "arrival_date", FILTER_SANITIZE_STRING);
$form_date_now = filter_input(INPUT_POST, "date_now", FILTER_SANITIZE_STRING);
$form_arrival_city = filter_input(INPUT_POST, "arrival_city", FILTER_SANITIZE_STRING);
$form_arrival_date = filter_input(INPUT_POST, "arrival_date", FILTER_SANITIZE_STRING);
$form_date_now = filter_input(INPUT_POST, "date_now", FILTER_SANITIZE_STRING);