PayPal Website Payments Standard - 2009 - Button Manager API (NVP) Betriebsanweisung PDF herunterladen (Seite 13)

Button Manager NVP API June, 2009 13

Using the Button Manager API

These examples show basic Button Manager API capabilities. The examples show how to

create buttons and set inventory levels.

z Specifying HTML Variables

z Creating a Button Using NVP

z Tracking Inventory for Menu Items Using NVP

Specifying HTML Variables

When you create or update a button using the Button Manager API, you must specify the same

HTML variables that you specify when creating any Website Payments Standard button.

Although you can use the L_BUTTONVAR

n field to specify any HTML variables, some

variables are commonly used in specific ways.

The following table provides additional information about some of these variables:

HTML Variable Notes

item_name Name or description of item. Must be specified for Add to Cart buttons.

Character length and limitations: 127 single-byte alphanumeric characters.

amount The price or amount of the item. Required for Add to Cart buttons. May not

be used when a dropdown with price (L_OPTION0PRICE

n) is defined.

Limitations: Value must be a positive number. No currency symbol. Must have

two decimal places, decimal separator must be a period (.), and the optional

thousands separator must be a comma (,).

a3 Price of subscription. Must be specified for Subscribe buttons. Value must be

a positive number. No currency symbol. Must have two decimal places,

decimal separator must be a period (.), and the optional thousands separator

must be a comma (,).

p3 Regular billing cycle. Must be specified for Subscribe buttons. Limitations:

Must be a positive integer greater than 0 and less than or equal to 30

t3 Regular billing cycle units. Must be specified for Subscribe buttons.

shopping_url URL where recipients can shop and redeem gift certificates. Required for Gift

Certificate buttons. Character length and limitations: 255 single-byte

alphanumeric characters

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PayPal Website Payments Standard - 2009 - Button Manager API (NVP) Betriebsanweisung Seite 13