<?php
// Include required library files.
require_once '../includes/config.php';
require_once '../includes/paypal.class.php';
// Create PayPal object.
$PayPalConfig = array('Sandbox' => $sandbox, 'APIUsername' => $api_username, 'APIPassword' => $api_password, 'APISignature' => $api_signature);
$PayPal = new PayPal($PayPalConfig);
// Prepare request arrays
$DAFields = array('transactionid' => '', 'amt' => '', 'transactionentity' => '', 'currencycode' => '', 'msgsubid' => '');
$PayPalRequestData = array('DAFields' => $DAFields);
// Pass data into class for processing with PayPal and load the response array into $PayPalResult
$PayPalResult = $PayPal->DoAuthorization($PayPalRequestData);
// Write the contents of the response array to the screen for demo purposes.
echo '<pre />';
print_r($PayPalResult);