PayUMoney Payment Integration with IPN in Codeigniter

Overview

Payment gateway offers the desired and vital link between the online seller (merchant), its customer, the customer’s online payment instrument provider and the bank account of the online merchant.

• First create merchant account in PayUMoney.
• The PayU Redirect Payment Page (RPP) allows merchants to integrate into PayU by redirecting their consumers to PayU’s hosted payment page.
• This is accomplished by using a combination of server side API calls and HTTPS redirects.
• The setTransaction API call is used to setup/initiate transactions between the merchant and PayU using server to server requests.
• Now first do setTransaction API call into your controller.

error_reporting(E_ALL);
			ini_set('display_errors', 1);
			ob_start();

			//-------------------------------------------------------------------
			//-------------------------------------------------------------------
			//-------
			//-------      Configs comes here
			//-------
			//-------------------------------------------------------------------
			//-------------------------------------------------------------------
			$baseUrl = 'https://staging.payu.co.za'; // testing environment URL
			// $baseUrl = 'https://secure.payu.co.za'; //production environment URL

			$soapWdslUrl = $baseUrl . '/service/PayUAPI?wsdl';
			$payuRppUrl = $baseUrl . '/rpp.do?PayUReference=';
			$apiVersion = 'ONE_ZERO';

			//set value != 1 if you dont want to auto redirect topayment page
			$doAutoRedirectToPaymentPage = 1;

			/*
			Store config details
 			*/
			$safeKey = '{CE62CE80-0EFD-4035-87C1-8824C5C46E7F}'; // safe key provided in merchant account
			$soapUsername = '100032'; // SOAP username provided in merchant account
			$soapPassword = 'PypWWegU'; // SOAP password provided in merchant account

			try {

				// 1. Building the Soap array  of data to send
				$setTransactionArray = array();
				$setTransactionArray['Api'] = $apiVersion;
				$setTransactionArray['Safekey'] = $safeKey;
				$setTransactionArray['TransactionType'] = 'PAYMENT';

				$setTransactionArray['AdditionalInformation']['merchantReference'] = 203269; //provided in merchant account
				$setTransactionArray['AdditionalInformation']['cancelUrl'] = 'http://your-cancel-url-comes-here';
				$setTransactionArray['AdditionalInformation']['returnUrl'] = 'http://your-return-url-comes-here';
				$setTransactionArray['AdditionalInformation']['notificationUrl'] = 'http://your-notification-url-comes-here';
				$setTransactionArray['AdditionalInformation']['supportedPaymentMethods'] = 'CREDITCARD';

				$setTransactionArray['Basket']['description'] = "Load Funds";
				$setTransactionArray['Basket']['amountInCents'] = 1000 // amount in cents
				$setTransactionArray['Basket']['currencyCode'] = 'ZAR';

				$setTransactionArray['Customer']['email'] = “john@doe.com”;
				$setTransactionArray['Customer']['firstName'] = 'John';
				$setTransactionArray['Customer']['lastName'] = 'Doe';
				$setTransactionArray['Customer']['mobile'] = '0211234567';
				$setTransactionArray['Customer']['regionalId'] = '1234512345122';
				$setTransactionArray['Customer']['countryCode'] = '27';

				// 2. Creating a XML header for sending in the soap heaeder (creating it raw a.k.a xml mode)
				$headerXml = '<wsse:Security SOAP-ENV:mustUnderstand="1" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">';
				$headerXml .= '<wsse:UsernameToken wsu:Id="UsernameToken-9" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">';
				$headerXml .= '<wsse:Username>' . $soapUsername . '</wsse:Username>';
				$headerXml .= '<wsse:Password Type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText">' . $soapPassword . '</wsse:Password>';
				$headerXml .= '</wsse:UsernameToken>';
				$headerXml .= '</wsse:Security>';
				$headerbody = new SoapVar($headerXml, XSD_ANYXML, null, null, null);

				// 3. Create Soap Header.
				$ns = 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd'; //Namespace of the WS.
				$header = new SOAPHeader($ns, 'Security', $headerbody, true);

				// 4. Make new instance of the PHP Soap client
				$soap_client = new SoapClient($soapWdslUrl, array("trace" => 1, "exception" => 0));

				// 5. Set the Headers of soap client.
				$soap_client->__setSoapHeaders($header);

				// 6. Do the setTransaction soap call to PayU
				$soapCallResult = $soap_client->setTransaction($setTransactionArray);

				// 7. Decode the Soap Call Result
				$returnData = json_decode(json_encode($soapCallResult), true);
				print "<br />-----------------------------------------------<br />\r\n";
				print "Return data decoded:<br />\r\n";
				print "-----------------------------------------------<br />\r\n";
				print "<pre>";
				var_dump($returnData);
				print "</pre>";

				if (isset($doAutoRedirectToPaymentPage) && ($doAutoRedirectToPaymentPage == 1)) {

					if ((isset($returnData['return']['successful']) && ($returnData['return']['successful'] === true) && isset($returnData['return']['payUReference']))) {
						// do some database insertion if you want to do
						// Redirecting to payment page
						header('Location: ' . $payuRppUrl . $returnData['return']['payUReference']);
						die();
					}
				}
			} catch (Exception $e) {
				var_dump($e);
			}

			//-------------------------------------------------------------------
			//-------------------------------------------------------------------
			//-------
			//-------      Checking response
			//-------
			//-------------------------------------------------------------------
			//-------------------------------------------------------------------
			if (is_object($soap_client)) {

				print "<br />-----------------------------------------------<br />\r\n";
				print "Request in XML:<br />\r\n";
				print "-----------------------------------------------<br />\r\n";
				echo str_replace('&gt;&lt;', '&gt;<br />&lt;', htmlspecialchars($soap_client->__getLastRequest(), ENT_QUOTES));
				print "\r\n<br />";
				print "-----------------------------------------------<br />\r\n";
				print "Response in XML:<br />\r\n";
				print "-----------------------------------------------<br />\r\n";
				echo str_replace('&gt;&lt;', '&gt;<br />&lt;', htmlspecialchars($soap_client->__getLastResponse(), ENT_QUOTES));
				// echo "test";exit;
			}
			die();

• After completion this, your page redirect to “returnURL” .
• Internally it also fire IPN (Instant Payment Notification). The Instant Payment Notification (IPN) is an asynchronous notification mechanism where PayU sends transaction results/information to a specified URL without any dependency on a customer’s browser.
• Notifications are sent in XML format using POST method.
• In the case of approval the IPN will fire after the payment has been attempted and will return that result.

IPN called under following conditions:

1. When a payment on the PayU redirect either fails or succeeds.
2. When a user session times out on the PayU redirect with no chance for the user to finish payment.
3. When a transaction, pending review for fraud, is either approved or rejected by case managers.

In your notification page write below code

$postdata = file_get_contents("php://input"); // get post data
		$xml = json_decode(json_encode(simplexml_load_string($postdata)), true); // convert it into array

		$paureference = $xml['PayUReference']; // unique payU reference
		$transaction = $xml['Secure3D']['lkpTransactionId']; // unique transaction id

		if ($xml['TransactionState'] == 'SUCCESSFUL' && isset($xml['Secure3D']['lkpTransactionId'])) {
			// do something if transaction succeed.
		} else if ($xml['TransactionState'] == 'FAILED') {
			// do something if transaction fails.
		} else if (empty($xml['Secure3D'] && $xml['Secure3D'] == '')) {
			//do something if transaction succeed but Issuer/Cardholder not participated.
		}

Bravo!!! Now you can collect payment from your customers.