问题
I use paypal express checkout on my website which adds specific postage amounts dependent on how much is spent by the client wherever they are in the world. However with the recent increase in overseas postage I am looking to add another postage amount dependent on where in the world the client is? Many thanks in advance Steve
回答1:
If you are using Express Checkout, you could utilize the Callback API to calculate the shipping and taxes and have it correctly displayed on the checkout page. Your server would be performing the calculations and then sending it over to PayPal to update the checkout page based on what shipping address they select from their PayPal account. Some merchants will even tie this in with other API's through 3rd party shipping to get accurate shipping charges. You can find more on the Callback API in the Developers Guide, on page 55. And there is some information here as well.
来源：https://stackoverflow.com/questions/15908348/paypal-express-checkout-adding-postage-options-dependent-on-location