@if($totalPassenger = $booking->calTotalPassenger())
    <br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function old() in /home/binainv/public_html/themes/Base/Booking/Views/frontend/booking/checkout-passengers.blade.php:2
Stack trace:
#0 {main}
  thrown in <b>/home/binainv/public_html/themes/Base/Booking/Views/frontend/booking/checkout-passengers.blade.php</b> on line <b>2</b><br />