16300, 'SGD' => 12100, 'EUR' => 17600, 'IDR' => 1]; if (!isset($_SESSION['exchange_rates'])) { $ratesJson = @file_get_contents("https://open.er-api.com/v6/latest/USD"); if ($ratesJson) { $ratesData = json_decode($ratesJson, true); if (isset($ratesData['rates'])) { $_SESSION['exchange_rates'] = $ratesData['rates']; } } } $rates = $_SESSION['exchange_rates'] ?? $fallbackRates; $idrRate = $rates['IDR'] ?? 16300; if ($fromCurrency === 'USD') return $amount * $idrRate; $fromRate = $rates[$fromCurrency] ?? null; if ($fromRate) return ($amount / $fromRate) * $idrRate; return $amount * ($fallbackRates[$fromCurrency] ?? 1); } // Lakukan konversi $total_idr_raw = convertToIdr($total_usd, $currency) * $passenger_count; $total_idr = round($total_idr_raw); $fare_idr = round($total_idr * 0.80); $taxes_idr = $total_idr - $fare_idr; // 4. PENANGANAN FORM SUBMISSION $success_message = ""; $errors = []; if ($_SERVER['REQUEST_METHOD'] === 'POST') { $email = isset($_POST['email']) ? trim($_POST['email']) : ''; $phone = isset($_POST['phoneNumber']) ? trim($_POST['phoneNumber']) : ''; $givenName = isset($_POST['givenName']) ? trim($_POST['givenName']) : ''; $familyName = isset($_POST['familyName']) ? trim($_POST['familyName']) : ''; $dob = isset($_POST['dob']) ? trim($_POST['dob']) : ''; if (empty($email) || !filter_var($email, FILTER_VALIDATE_EMAIL)) { $errors[] = "Email tidak valid."; } if (empty($phone)) { $errors[] = "Nomor telepon wajib diisi."; } if (empty($givenName) || empty($familyName)) { $errors[] = "Nama lengkap penumpang wajib diisi."; } if (empty($errors)) { $success_message = "Pemesanan berhasil! Pembayaran sebesar IDR " . number_format($total_idr, 0, ',', '.') . " berhasil diproses menggunakan saldo Anda."; } } ?>