User Guide

Button Manager NVP API April 2012 51
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HTML Variables for PayPal
Payments Standard
You can use all variables supported for your button: Buy Now, Donation, Subscribe, Add to
Cart, and View Cart buttons. You can also use HTML variables supported the Cart Upload
command.
Technical HTML Variables
Technical HTML variables control how PayPal responds technically when people click
PayPal Payments Standard payment buttons or when third-party or custom carts initiate
payment processing with the Cart Upload command. They also control how your buttons
interact with special PayPal features.
Allowable Values for the cmd HTML Variable
Value of cmd Description
_xclick The button that the person clicked was a Buy Now button.
_cart For shopping cart purchases. The following variables specify the kind
of shopping cart button that the person clicked:
 add – Add to Cart buttons for the PayPal Shopping Cart
 display – View Cart buttons for the PayPal Shopping Cart
 upload – The Cart Upload command for third-party carts
_oe-gift-certificate The button that the person clicked was a Buy Gift Certificate button.
_xclick-subscriptions The button that the person clicked was a Subscribe button.
_xclick-auto-billing The button that the person clicked was an Automatic Billing button.
_xclick-payment-plan The button that the person clicked was an Installment Plan button.
_donations The button that the person clicked was a Donate button.
_s-xclick The button that the person clicked was protected from tampering by
using encryption, or the button was saved in the merchant’s PayPal
account. PayPal determines which kind of button was clicked by
decoding the encrypted code or by looking up the saved button in the
merchant’s account.