if (is_null($cust_em['email'])) {
     $my_file = "./customer_history/" . "{$email}" . ".txt";
     foreach ($_SESSION['cart'] as $skirt_id => $details) {
         $id = $_SESSION['cart'][$skirt_id]['item'];
         $cart_qty = $_SESSION['cart'][$skirt_id]['quantity'];
         $item = new Item();
         $row = $item->getSkirtDetails($id);
         $ss = $row->fetch_array(MYSQLI_ASSOC);
         $new_qty = $ss['qty'] - $cart_qty;
         $new_num_bought = $ss['num_bought'] + $cart_qty;
         $data = $_SESSION['cart'][$skirt_id]['item'] . "\n";
         file_put_contents($my_file, $data, FILE_APPEND);
         //
         $item->updateSkirt($id, $new_qty, $new_num_bought);
     }
     $row = $item->getCustomerEmail($email);
     $cust_details = $row->fetch_array(MYSQLI_ASSOC);
     $item->makeCustomer($firstname, $middlename, $lastname, $email, $address, $country, $phone, $my_file);
     $row1 = $item->getCustomerDetails($email);
     $ss1 = $row1->fetch_array(MYSQLI_ASSOC);
     $cid = $ss1['cust_id'];
     $item->makeOrder($cid, $date);
     $mail->sendAlertMail($firstname, $lastname, $email);
     header('Location: orders.php');
 } elseif (!is_null($cust_em['email']) && strcmp($cust_em['email'], $email) === 0) {
     $my_file1 = "./customer_history/" . "{$email}" . ".txt";
     foreach ($_SESSION['cart'] as $skirt_id => $details) {
         $id = $_SESSION['cart'][$skirt_id]['item'];
         $cart_qty = $_SESSION['cart'][$skirt_id]['quantity'];
         $item = new Item();
         $row = $item->getSkirtDetails($id);