Ok, I finally found out that not only does the response from the BMUpdateButton API return the HTML to create a form, it also returns other data as well within the returned array.
Once you make the request it will return an array with three keys as per the BMUpdateButton Response section on the API page linked above.
These are:
WEBSITECODE
HTML code for web pages
This is what I was looking for; a plain link you can redirect users to
The id of the button.
Be advised when altering the contents of a hosted button you need to pass all the details of the button to it as when you created it; so as an example, if you leave out passing it an item name the item name will be blank and Paypal will allow the user to set it.
Also, an important note is that when you update the button details, it isn't just updated for that users session, it updates it within your paypal account - so the new name/price etc will affect all users that attempt to use it.
If you still would like to update the details of the button you can do that with the below:
I personally started with this class:
<?php
class Paypal
{
/**
* Last error message(s)
* @var array
*/
protected $_errors = array();
/**
* API Credentials
* Use the correct credentials for the environment in use (Live / Sandbox)
* @var array
*/
protected $_credentials = array(
'USER' => 'seller_1297608781_biz_api1.lionite.com',
'PWD' => '1297608792',
'SIGNATURE' => 'A3g66.FS3NAf4mkHn3BDQdpo6JD.ACcPc4wMrInvUEqO3Uapovity47p',
);
/**
* API endpoint
* Live - https://api-3t.paypal.com/nvp
* Sandbox - https://api-3t.sandbox.paypal.com/nvp
* @var string
*/
protected $_endPoint = 'https://api-3t.sandbox.paypal.com/nvp';
/**
* API Version
* @var string
*/
protected $_version = '74.0';
/**
* Make API request
*
* @param string $method string API method to request
* @param array $params Additional request parameters
* @return array / boolean Response array / boolean false on failure
*/
public function request($method, $params = array())
{
$this->_errors = array();
if (empty($method)) { //Check if API method is not empty
$this->_errors = array('API method is missing');
return false;
}
//Our request parameters
$requestParams = array(
'METHOD' => $method,
'VERSION' => $this->_version
) + $this->_credentials;
//Building our NVP string
$request = http_build_query($requestParams + $params);
//cURL settings
$curlOptions = array(
CURLOPT_URL => $this->_endPoint,
CURLOPT_VERBOSE => 1,
CURLOPT_SSL_VERIFYPEER => true,
CURLOPT_SSL_VERIFYHOST => 2,
CURLOPT_CAINFO => dirname(__FILE__) . '/cacert.pem', //CA cert file
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_POST => 1,
CURLOPT_POSTFIELDS => $request
);
$ch = curl_init();
curl_setopt_array($ch, $curlOptions);
//Sending our request - $response will hold the API response
$response = curl_exec($ch);
//Checking for cURL errors
if (curl_errno($ch)) {
$this->_errors = curl_error($ch);
curl_close($ch);
return false;
//Handle errors
} else {
curl_close($ch);
$responseArray = array();
parse_str($response, $responseArray); // Break the NVP string to an array
return $responseArray;
}
}
}
?>
Credit: https://www.smashingmagazine.com/2011/09/getting-started-with-the-paypal-api/
Then I did the below:
include(dirname(__FILE__) . '/includes/paypal.class.php');
$paypal = new Paypal();
// Set our method
$method = 'BMUpdateButton';
// Set our params
$params = array(
'HOSTEDBUTTONID' => 'your_button_id',
'BUTTONTYPE' => 'BUYNOW',
'BUTTONSUBTYPE' => 'SERVICES',
'L_BUTTONVAR0' => 'item_name=Your Description',
'L_BUTTONVAR1' => 'amount=999.00',
'L_BUTTONVAR2' => 'currency_code=AUD',
'L_BUTTONVAR3' => 'cancel_return=http://www.example.com/cancel.html',
'L_BUTTONVAR4' => 'return=http://www.example.com/success.html'
);
// Make request to change button details
$result = $paypal->request($method, $params);
Note that while Paypal say that BUTTONSUBTYPE is optional, you will likely get an error if you don't include it.
