Introduction to Integrating BillDesk Payment Gateway into PHP

Integrating online payment solutions into a web application can be a powerful tool to streamline transactions. This guide walks you through the steps to integrate the BillDesk Payment Gateway into a PHP application.

Step 1: Obtain Necessary Credentials

To begin, you need to collect the following credentials from BillDesk:

Merchant ID Access Key Secret Key Test credentials for the sandbox environment

Step 2: Setting Up Your Environment

Ensure your PHP environment is properly configured. This includes:

Web server like Apache or Nginx Database like MySQL (if needed)

Step 3: Creating a Payment Request

To initiate a payment, create a payment form that submits the relevant details to BillDesk. An example is provided below:

Merchant ID:
Order ID:
Amount:
Currency:
Redirect URL:
Pay

Step 4: Generating Checksum for Security

To ensure the security of the transaction, generate a checksum by hashing the relevant parameters using your secret key. Here's an example in PHP:

function generateChecksum($data, $secretKey) { ksort($data); $concatString ''; foreach ($data as $key > $value) { $concatString . $key . '' . $value; } $concatString . 'secret_key' . $secretKey; return hash('sha256', $concatString); } $paymentData [ 'merchant_id' > 'YOUR_MERCHANT_ID', 'order_id' > 'ORDER_ID', 'amount' > 'AMOUNT', 'currency' > 'INR', 'redirect_url' > 'YOUR_REDIRECT_URL' ]; $secretKey 'YOUR_SECRET_KEY'; $paymentData['checksum'] generateChecksum($paymentData, $secretKey);

Step 5: Handling the Response

BillDesk will redirect the user back to your specified redirect_url. You need to handle the response and verify the payment status. Here's an example response handling in PHP:

if ($_SERVER["REQUEST_METHOD"]  'POST') {
    $response  $_POST;
    $computedChecksum  generateChecksum($response, $secretKey);
    if ($computedChecksum  $response["checksum"]  $response["status"]  'SUCCESS') {
        // Process successful payment
        // Update database
        echo 'Payment successful';
    } else {
        echo 'Payment failed';
    }
}

Step 6: Testing Your Integration

Thoroughly test your integration in the BillDesk sandbox environment. Ensure you handle all scenarios including:

Success cases Failure cases Network issues

Step 7: Going Live

Once your integration is successful in the sandbox, switch to the production credentials and URLs provided by BillDesk.

Additional Notes

Handle errors gracefully and provide user-friendly messages. Consult the BillDesk documentation for specific requirements, parameters, and additional features.

This guide should provide you with a solid foundation for integrating the BillDesk Payment Gateway into your PHP application. If you have any specific questions or run into issues, feel free to ask!