what's wrong with this code to update a paypal button? I get "buttontype invalid error"

Question

I'm trying to dynamically update a PayPal hosted button but getting an error that ``` The button type specified is invalid. ``` I used the PPHttpPost function (which is probably fine), taken from here: https://www.x.com/paypal-apis-dodirectpayment-php-5.3/nvp, I just removed all the `nvp` variables except API signature, password etc. This is my code to use the ButtonManager: ``` // Set request-specific fields. $nvpStr = "&HOSTEDBUTTONID=buynow&BUTTONCODE=HOSTED&AMT=330.66&BUTTONTYPE=BUYNOW"; // Execute the API operation; see the PPHttpPost function above. $httpParsedResponseAr = PPHttpPost('BMUpdateButton', $nvpStr); var_dump($httpParsedResponseAr); ?> ``` What am I doing wrong? Edit When I remove HOSTEDBUTTONID from the request string and output the full NVP string, I get this (replaced some characters with underscore for privacy): ``` METHOD=BMUpdateButton&VERSION=98.0&PWD=1362320204&USER=___._1362320167_biz_api1.gmail.com&SIGNATURE=________________&BUTTONCODE=HOSTED&AMT=330.66 ```

Accepted Answer

After running into the same issue, I have figured the issue out.

Along with:

```
"BUTTONTYPE" => "BUYNOW"
```

You need:

```
"BUTTONSUBTYPE" => "PRODUCTS"
```

I know it says optional in the API docs, but it's really required.

The sub type will either be PRODUCTS or SERVICES.

what's wrong with this code to update a paypal button? I get "buttontype invalid error"

Solution

Problem