{"id":7005,"date":"2018-05-30T00:00:00","date_gmt":"2018-05-29T16:00:00","guid":{"rendered":"https:\/\/www.fraudlabspro.com\/resources2\/tutorials\/how-to-integrate-fraudlabs-pro-fraud-detection-with-paypal-payment\/"},"modified":"2026-04-02T18:32:54","modified_gmt":"2026-04-02T10:32:54","password":"","slug":"how-to-integrate-fraudlabs-pro-fraud-detection-with-paypal-payment","status":"publish","type":"docs","link":"https:\/\/www.fraudlabspro.com\/resources\/tutorials\/how-to-integrate-fraudlabs-pro-fraud-detection-with-paypal-payment\/","title":{"rendered":"How to integrate FraudLabs Pro fraud detection with PayPal payment"},"content":{"rendered":"

Description: This tutorial demonstrates how to integrate FraudLabs Pro fraud detection service into PayPal payment process. Below we show you the step-by-step instructions using the PHP language.<\/p>\n

<\/i> Using PHP<\/h2>\n

Create a new table to store the transaction value of FraudLabs Pro and PayPal payment processing. This table will be used during the settlement, void or refund process.<\/p>\n

CREATE TABLE `fraudlabs_pro` (\n\t`flp_transaction_id` CHAR(15) NOT NULL,\n\t`flp_status` VARCHAR(10) NOT NULL,\n\t`paypal_transaction_id` VARCHAR(30) NOT NULL,\n\t`paypal_amount` DECIMAL(12,2) NOT NULL,\n\t`paypal_captured_id` VARCHAR(30),\n\tPRIMARY KEY (`flp_transaction_id`)\n)\nCOLLATE='utf8_general_ci'\nENGINE=MyISAM;<\/pre>\n
Download FraudLabs Pro PHP class from https:\/\/github.com\/fraudlabspro\/fraudlabspro-php\/releases<\/a><\/p>\n
Integrate FraudLabs Pro fraud detection logic with your PayPal code. This code will perform a simple validation check of one credit card purchase and perform the appropriate action based on the fraud validation result.<\/p>\n
\/\/ Include FraudLabs Pro library\nrequire_once 'PATH_TO_FRAUDLABSPRO\/lib\/FraudLabsPro.php';\n\n\/\/ Include PayPal library\nuse PayPalApiAmount;\nuse PayPalApiPayer;\nuse PayPalApiPayment;\nuse PayPalApiRedirectUrls;\nuse PayPalApiTransaction;\n\n$apiContext = new PayPalRestApiContext(\n    new PayPalAuthOAuthTokenCredential(\n        'your_client_id',     \/\/ ClientID\n        'your_client_secret'  \/\/ ClientSecret\n    )\n);\n\nFraudLabsProConfiguration::apiKey('your_fraudlabspro_api_key');\n\n\/\/ Check this transaction for possible fraud. FraudLabs Pro support comprehensive validation check,\n\/\/ and for this example, we only perform the IP address, BIN and billing country validation.\n\/\/ For complete validation, please check our developer page at http:\/\/www.fraudlabspro.com\/developer\n$orderDetails = [\n\t'order'\t\t=> [\n\t\t'amount'\t=> $_POST['amount'],\n\t],\n\t'billing'\t=> [\n\t\t'country'\t=> $_POST['country'],\n\t],\n];\n\n\/\/ Sends the order details to FraudLabs Pro\n$fraudResult = FraudLabsProOrder::validate($orderDetails);\n\n\/\/ This transaction is legitimate, let's submit to PayPal\nif ($fraudResult->fraudlabspro_status == 'APPROVE') {\n\t\/\/ Set Payer that funds a payment\n\t$payer = new Payer();\n\t$payer->setPaymentMethod(\"paypal\");\n\n\t\/\/ Set payment amount\n\t$amount = new Amount();\n\t$amount->setCurrency(\"USD\");\n\t$amount->setTotal($_POST['amount']);\n\n\t\/\/ Set transaction that defines the details of payment\n\t$transaction = new Transaction();\n\t$transaction->setAmount($amount);\n\t$transaction->setInvoiceNumber(uniqid());\n\n\t\/\/ Set the URLs that the buyer must be redirected to after payment approval\/cancellation\n\t$redirectUrls = new RedirectUrls();\n\t$redirectUrls->setReturnUrl(\"https:\/\/example.com\/your_redirect_url.html\");\n\t$redirectUrls->setCancelUrl(\"https:\/\/example.com\/your_cancel_url.html\");\n\n\t\/\/ Set payment resource\n\t$payment = new Payment();\n\t$payment->setIntent(\"sale\");\n\t$payment->setPayer($payer);\n\t$payment->setRedirectUrls($redirectUrls);\n\t$payment->setTransactions(array($transaction));\n\n\t\/\/ Create payment\n\ttry {\n\t\t$payment->create($apiContext);\n\t\t\/\/ echo $payment;\n\n\t\techo \"nnRedirect user to approval_url: \" . $payment->getApprovalLink() . \"n\";\n\t}\n\tcatch (PayPalExceptionPayPalConnectionException $ex) {\n\t\t\/\/ This will print the detailed information on the exception.\n\t\techo $ex->getData();\n\t}\n}\n\n\/\/ Transaction has been rejected by FraudLabs Pro based on your custom validation rules.\nelseif ($fraudResult->fraudlabspro_status == 'REJECT') {\n\t\/*\n\tDo something here, try contact the customer for verification\n\t*\/\n}\n\n\/\/ Transaction is marked for a manual review by FraudLabs Pro based on your custom validation rules.\nelseif ($fraudResult->fraudlabspro_status == 'REVIEW') {\n\t\/\/ Set Payer that funds a payment\n\t$payer = new Payer();\n\t$payer->setPaymentMethod(\"paypal\");\n\n\t\/\/ Set payment amount\n\t$amount = new Amount();\n\t$amount->setCurrency(\"USD\");\n\t$amount->setTotal($_POST['amount']);\n\n\t\/\/ Set transaction that defines the details of payment\n\t$transaction = new Transaction();\n\t$transaction->setAmount($amount);\n\t$transaction->setInvoiceNumber(uniqid());\n\n\t\/\/ Set the URLs that the buyer must be redirected to after payment approval\/cancellation\n\t$redirectUrls = new RedirectUrls();\n\t$redirectUrls->setReturnUrl(\"https:\/\/example.com\/your_redirect_url.html\");\n\t$redirectUrls->setCancelUrl(\"https:\/\/example.com\/your_cancel_url.html\");\n\n\t\/\/ Set payment resource\n\t$payment = new Payment();\n\t$payment->setIntent(\"authorize\");\n\t$payment->setPayer($payer);\n\t$payment->setRedirectUrls($redirectUrls);\n\t$payment->setTransactions(array($transaction));\n\n\t\/\/ Create payment\n\ttry {\n\t\t$payment->create($apiContext);\n\n\t\techo \"nnRedirect user to approval_url: \" . $payment->getApprovalLink() . \"n\";\n\t\t$transactions = $payment->getTransactions();\n\t\t$related_resources = $transactions[0]->getRelatedResources();\n\t\t$txn_authorize = $related_resources[0]->getAuthorization();\n\t\t$txn_authorize_id = $txn_authorize->getId();\n\n\t\ttry{\n\t\t\t\/\/ Initial MySQL connection\n\t\t\t$db = new PDO('mysql:host=your_database_host;dbname=your_database_name;charset=utf8', 'your_database_user', 'your_database_password');\n\t\t\t$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);\n\n\t\t\t\/\/ Store the transaction information for decision making\n\t\t\t$st = $db->prepare('INSERT INTO `fraudlabs_pro` (flp_transaction_id, flp_status, paypal_transaction_id, paypal_amount) VALUES (:flpId, :flpStatus, :paypalId, :paypalAmount)');\n\t\t\t$st->execute(array(\n\t\t\t\t':flpId'=>$fraudResult->fraudlabspro_id,\n\t\t\t\t':flpStatus'=>$fraudResult->fraudlabspro_status,\n\t\t\t\t':paypalId'=>$txn_authorize_id,\n\t\t\t\t':paypalAmount'=>$_POST['amount']\n\t\t\t));\n\t\t}\n\t\tcatch(PDOException $e){\n\t\t\t\/\/ MySQL error\n\t\t\tdie($e->getFile() . ':' . $e->getLine() . ' ' . $e->getMessage());\n\t\t}\n\t}\n\tcatch (PayPalExceptionPayPalConnectionException $ex) {\n\t\t\/\/ This will print the detailed information on the exception.\n\t\techo $ex->getData();\n\t}\n}<\/pre>\n
Now, we are going to create a callback page to receive the review action, APPROVE or REJECT, performed by the merchant.<\/p>\n
Note: You need to configure the callback URL at the FraudLabs Pro merchant area->settings page. It has to be pointed to the location where you hosted this \u00e2\u20ac\u0153fraudlabspro-callback.php\u00e2\u20ac\u009d file. Below is the sample code for fraudlabspro-callback.php<\/p>\n
\/\/ Include PayPal library\nuse PayPalApiAmount;\nuse PayPalApiAuthorization;\nuse PayPalApiCapture;\n\n$id = (isset($_POST['id'])) ? $_POST['id'] : '';\n$action = (isset($_POST['action'])) ? $_POST['action'] : '';\n\nif($id && in_array($action, array('APPROVE', 'REJECT'))){\n\ttry{\n\t\t\/\/ Initial MySQL connection\n\t\t$db = new PDO('mysql:host=your_database_host;dbname=your_database_name;charset=utf8', 'your_database_user', 'your_database_password');\n\t\t$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);\n\n\t\t\/\/ Get the PayPal Transaction ID\n\t\t$st = $db->prepare('SELECT * FROM `fraudlabs_pro` WHERE `flp_transaction_id`=:flpId AND `flp_status`='REVIEW'');\n\t\t$st->execute(array(\n\t\t\t':flpId'=>$id\n\t\t));\n\n\t\tif($st->rowCount() == 1){\n\t\t\t$row = $st->fetch(PDO::FETCH_ASSOC);\n\n\t\t\t$apiContext = new PayPalRestApiContext(\n\t\t\t\tnew PayPalAuthOAuthTokenCredential(\n\t\t\t\t\t'your_client_id',     \/\/ ClientID\n\t\t\t\t\t'your_client_secret'  \/\/ ClientSecret\n\t\t\t\t)\n\t\t\t);\n\n\t\t\t$authorizationId = $row['paypal_transaction_id'];\n\n\t\t\tif($action == 'REJECT'){\n\t\t\t\t\/\/ Merchant rejected the order. Void the transaction in PayPal\n\t\t\t\ttry {\n\t\t\t\t\t\/\/ Lookup the authorization\n\t\t\t\t\t$authorization = Authorization::get($authorizationId, $apiContext);\n\n\t\t\t\t\t\/\/ Void the authorization\n\t\t\t\t\t$voidedAuth = $authorization->void($apiContext);\n\n\t\t\t\t\t\/\/ Update database\n\t\t\t\t\t$st = $db->prepare('UPDATE `fraudlabs_pro` SET `flp_status`=:action WHERE `flp_transaction_id`=:flpId');\n\t\t\t\t\t$st->execute(array(\n\t\t\t\t\t\t':flpId'=>$id,\n\t\t\t\t\t\t':action'=>$action\n\t\t\t\t\t));\n\t\t\t\t} catch (PayPalExceptionPayPalConnectionException $ex) {\n\t\t\t\t\t\/\/ This will print the detailed information on the exception.\n\t\t\t\t\techo $ex->getData();\n\t\t\t\t}\n\t\t\t}\n\t\t\telse{\n\t\t\t\t\/\/ Merchant approved the order. Submit for settlement\n\t\t\t\ttry {\n\t\t\t\t\t\/\/ Retrieve the authorization\n\t\t\t\t\t$authorization = Authorization::get($authorizationId, $apiContext);\n\n\t\t\t\t\t\/\/ Set payment amount\n\t\t\t\t\t$amount = new Amount();\n\t\t\t\t\t$amount->setCurrency(\"USD\");\n\t\t\t\t\t$amount->setTotal($row['paypal_amount']);\n\n\t\t\t\t\t\/\/ Create a capture\n\t\t\t\t\t$capture = new Capture();\n\t\t\t\t\t$capture->setAmount($amount);\n\n\t\t\t\t\t\/\/ Perform a capture\n\t\t\t\t\t$getCapture = $authorization->capture($capture, $apiContext);\n\t\t\t\t\t$captureID = $getCapture->getId();\n\n\t\t\t\t\t\/\/ Update database\n\t\t\t\t\t$st = $db->prepare('UPDATE `fraudlabs_pro` SET `flp_status`=:action, `paypal_captured_id`=:captureId WHERE `flp_transaction_id`=:flpId');\n\t\t\t\t\t$st->execute(array(\n\t\t\t\t\t\t':flpId'=>$id,\n\t\t\t\t\t\t':captureid'=>$captureID,\n\t\t\t\t\t\t':action'=>$action\n\t\t\t\t\t));\n\t\t\t\t} catch (PayPalExceptionPayPalConnectionException $ex) {\n\t\t\t\t\t\/\/ This will print the detailed information on the exception.\n\t\t\t\t\techo $ex->getData();\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\tcatch(PDOException $e){\n\t\t\/\/ MySQL error\n\t\tdie($e->getFile() . ':' . $e->getLine() . ' ' . $e->getMessage());\n\t}\n}<\/pre>\n
If there is a need to issue a refund of a settled transaction, below is the sample code of how to accomplish that.<\/p>\n
\/\/ Include PayPal library\nuse PayPalApiCapture;\nuse PayPalApiRefund;\nuse PayPalApiRefundRequest;\n\ntry{\n\t\/\/ Initial MySQL connection\n\t$db = new PDO('mysql:host=your_database_host;dbname=your_database_name;charset=utf8', 'your_database_user', 'your_database_password');\n\t$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);\n\n\t\/\/ Get the PayPal transaction ID based on the FraudLabs Pro ID\n\t$st = $db->prepare('SELECT * FROM `fraudlabs_pro` WHERE `flp_transaction_id`=:flpId');\n\t$st->execute(array(\n\t\t':flpId'=>$_POST['flpId']\n\t));\n\n\tif($st->rowCount() == 1){\n\t\t$row = $st->fetch(PDO::FETCH_ASSOC);\n\n\t\t$apiContext = new PayPalRestApiContext(\n\t\t\tnew PayPalAuthOAuthTokenCredential(\n\t\t\t\t'your_client_id',     \/\/ ClientID\n\t\t\t\t'your_client_secret'  \/\/ ClientSecret\n\t\t\t)\n\t\t);\n\n\t\t$captureId = $row['paypal_captured_id'];\n\n\t\t\/\/ Set payment amount\n\t\t$amount = new Amount();\n\t\t$amount->setCurrency(\"USD\");\n\t\t$amount->setTotal(20);\n\n\t\t\/\/ Set refund request\n\t\t$refundRequest = new RefundRequest();\n\t\t$refundRequest->setAmount($amount);\n\n\t\ttry {\n\t\t\t\/\/ Retrieve Capture details\n\t\t\t$capture = Capture::get($captureId, $apiContext);\n\n\t\t\t\/\/ Refund the Capture \n\t\t\t$captureRefund = $capture->refundCapturedPayment($refundRequest, $apiContext);\n\n\t\t\t\/\/ Update database\n\t\t\t$st = $db->prepare('UPDATE `fraudlabs_pro` SET `flp_status`='REFUNDED' WHERE `flp_transaction_id`=:flpId');\n\t\t\t$st->execute(array(\n\t\t\t\t':flpId'=>$_POST['flpId']\n\t\t\t));\n\t\t} catch (PayPalExceptionPayPalConnectionException $ex) {\n\t\t\t\/\/ This will print the detailed information on the exception.\n\t\t\techo $ex->getData();\n\t\t}\n\t}\n}\ncatch(PDOException $e){\n\t\/\/ MySQL error\n\tdie($e->getFile() . ':' . $e->getLine() . ' ' . $e->getMessage());\n}<\/pre>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
Description: This tutorial demonstrates how to integrate FraudLabs Pro fraud detection service into PayPal payment process. 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