How URLENCODE be used within HEADER('Location:') command?

Question

i have a php code i want header command work with URLENCODE

header("location:invoice.php?userID=".$userID."&invoiceID=".$invoiceID);

the url show like this below and i want when username call from database if in username any special character like "&" with help of URLENCODE in url & into %26 so URL work perfectly.

https://domainname.com/invoice.php?userID=Aayaan&Arbab&invoiceID=13314

Answer 1

header("location: invoice.php?userID=". urlencode($userID)."&invoiceID=".$invoiceID);