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* @return array Parsed HTTP Response body

*/

function PPHttpPost($methodName_, $nvpStr_) {

global $environment;

// Set up your API credentials, PayPal end point, and API version.

$API_UserName = urlencode('my_api_username');

$API_Password = urlencode('my_api_password');

$API_Signature = urlencode('my_api_signature');

$API_Endpoint = "https://api-3t.paypal.com/nvp";

if("sandbox" === $environment || "beta-sandbox" === $environment) {

$API_Endpoint = "https://api-3t.$environment.paypal.com/nvp";

}

$version = urlencode('51.0');

// Set the curl parameters.

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $API_Endpoint);

curl_setopt($ch, CURLOPT_VERBOSE, 1);

// Turn off the server and peer verification (TrustManager Concept).

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_POST, 1);

// Set the API operation, version, and API signature in the request.

$nvpreq = "METHOD=$methodName_&VERSION=$version&PWD=$API_Password&USER=$API_UserName".

"&SIGNATURE=$API_Signature$nvpStr_";

// Set the request as a POST FIELD for curl.

curl_setopt($ch, CURLOPT_POSTFIELDS, $nvpreq);

// Get response from the server.

$httpResponse = curl_exec($ch);

if(!$httpResponse) {

exit("$methodName_ failed: ".curl_error($ch).'('.curl_errno($ch).')');

}

// Extract the response details.

$httpResponseAr = explode("&", $httpResponse);

$httpParsedResponseAr = array();

foreach ($httpResponseAr as $i => $value) {

$tmpAr = explode("=", $value);

if(sizeof($tmpAr) > 1) {

$httpParsedResponseAr[$tmpAr[0]] = $tmpAr[1];

}

}

if((0 == sizeof($httpParsedResponseAr))||!array_key_exists('ACK', $httpParsedResponseAr))

{

exit("Invalid HTTP Response for POST request($nvpreq) to $API_Endpoint.");

}

return $httpParsedResponseAr;

}

// Set request-specific fields.

$paymentType = urlencode('Authorization'); // or 'Sale'

$firstName = urlencode('customer_first_name');

$lastName = urlencode('customer_last_name');

$creditCardType = urlencode('customer_credit_card_type');

$creditCardNumber = urlencode('customer_credit_card_number');

$expDateMonth = 'cc_expiration_month';

// Month must be padded with leading zero

$padDateMonth = urlencode(str_pad($expDateMonth, 2, '0', STR_PAD_LEFT));

$expDateYear = urlencode('cc_expiration_year');

$cvv2Number = urlencode('cc_cvv2_number');

$address1 = urlencode('customer_address1');

$address2 = urlencode('customer_address2');

$city = urlencode('customer_city');

$state = urlencode('customer_state');

$zip = urlencode('customer_zip');

$country = urlencode('customer_country'); // US or other valid country code

$amount = urlencode('example_payment_amuont');

$currencyID = urlencode('USD'); // or other currency ('GBP', 'EUR', 'JPY', 'CAD', 'AUD')

// Add request-specific fields to the request string.

$nvpStr ="&PAYMENTACTION=$paymentType&AMT=$amount&CREDITCARDTYPE=$creditCardType".

"&ACCT=$creditCardNumber&EXPDATE=$padDateMonth$expDateYear&CVV2=$cvv2Number".

"&FIRSTNAME=$firstName&LASTNAME=$lastName&STREET=$address1&CITY=$city".

"&STATE=$state&ZIP=$zip&COUNTRYCODE=$country&CURRENCYCODE=$currencyID";

// Execute the API operation; see the PPHttpPost function above.

$httpParsedResponseAr = PPHttpPost('DoDirectPayment', $nvpStr);

if("SUCCESS" == strtoupper($httpParsedResponseAr["ACK"])||"SUCCESSWITHWARNING"==

strtoupper($httpParsedResponseAr["ACK"])) {

exit('Direct Payment Completed Successfully: '.print_r($httpParsedResponseAr, true));

} else {

exit('DoDirectPayment failed: ' . print_r($httpParsedResponseAr, true));

}

?>

Chapter 4. PayPal Adaptive Payments

Overview of Adaptive Payments

PayPal’s Adaptive Payments allow you to send money in a variety of scenarios. Using Adaptive Payments, you can build a “send money” application for a social networking site or build a robust payment system. Through the Adaptive Payments API, you can build an application that can handle payments, payment preapprovals, and refunds. You can also