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Figure 4-10. Adaptive Payments Integration Wizard step 1

Figure 4-11. Adaptive Payments Integration Wizard step 2

Figure 4-12. Adaptive Payments Integration Wizard step 3

Figure 4-13. Adaptive Payments Integration Wizard step 4

Figure 4-14. Adaptive Payments Integration Wizard step 5

Example 4-1. paypalplatform.php

/********************************************

PayPal Adaptive Payments API Module

Defines all the global variables and the wrapper functions

********************************************/

$PROXY_HOST = '127.0.0.1';

$PROXY_PORT = '808';

$Env = "sandbox";

//------------------------------------

// PayPal API Credentials

// Replace with your API Username

// Replace with your API Password

// Replace with your Signature

//------------------------------------

$API_UserName = "";

$API_Password = "";

$API_Signature = "";

// AppID is preset for sandbox use

// If your application goes live, you will be assigned a value for the live

// environment by PayPal as part of the live onboarding process.

$API_AppID = "APP-80W284485P519543T";

$API_Endpoint = "";

if ($Env == "sandbox")

{

$API_Endpoint = "https://svcs.sandbox.paypal.com/AdaptivePayments";

}

else

{

$API_Endpoint = "https://svcs.paypal.com/AdaptivePayments";

}

$USE_PROXY = false;

if (session_id() == "")

session_start();

function generateCharacter () {

$possible = "1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

$char = substr($possible, mt_rand(0, strlen($possible)-1), 1);

return $char;

}

function generateTrackingID () {

$GUID = generateCharacter().generateCharacter().generateCharacter();

$GUID .=generateCharacter().generateCharacter().generateCharacter();

$GUID .=generateCharacter().generateCharacter().generateCharacter();

return $GUID;

}

/*

'-------------------------------------------------------------------------------

' Purpose: Prepares the parameters for the Refund API Call.

' The API credentials used in a Pay call can make the Refund call

' against a payKey, or a tracking id, or to specific receivers of a payKey or

' a tracking id that resulted from the Pay call.

'

' A receiver itself with its own API credentials can make a Refund call against

' the transactionId corresponding to their transaction.

' The API credentials used in a Pay call cannot use transactionId to issue a refund

' for a transaction for which they themselves were not the receiver.

'

' If you do specify specific receivers, you must provide the amounts as well.

' If you specify a transactionId, then only the receiver of that transactionId

' is affected. Therefore the receiverEmailArray and receiverAmountArray should

' have 1 entry each if you do want to give a partial refund.

' Inputs:

'

' Conditionally Required:

' One of the following: payKey or trackingId or trasactionId or

' (payKey and receiverEmailArray and receiverAmountArray) or

' (trackingId and receiverEmailArray and receiverAmountArray)

' or (transactionId and receiverEmailArray

' and receiverAmountArray)

' Returns:

' The NVP Collection object of the Refund call response.

'------------------------------------------------------------------------------------

*/

function CallRefund( $payKey, $transactionId, $trackingId,

$receiverEmailArray, $receiverAmountArray )

{

/* Gather the information to make the Refund call.

The variable nvpstr holds the name-value pairs.

*/

$nvpstr = "";

// conditionally required fields

if ("" != $payKey)

{

$nvpstr = "payKey=" . urlencode($payKey);

if (0 != count($receiverEmailArray))

{

reset($receiverEmailArray);

while (list($key, $value) = each($receiverEmailArray))

{

if ("" != $value)

{

$nvpstr .= "&receiverList.receiver(" . $key . ").email=" . urlencode($value);

}

}

}

if (0 != count($receiverAmountArray))

{

reset($receiverAmountArray);

while (list($key, $value) = each($receiverAmountArray))

{

if ("" != $value)

{

$nvpstr