Payment Gateway Wiki-Step-by-Step Guide: Integrating Indian Payment Gateway with PHP for Seamless Transactions

Step-by-Step Guide: Integrating Indian Payment Gateway with PHP for Seamless Transactions

Integrating a payment gateway into a PHP application is a common requirement for e-commerce websites and other platforms that require online transactions. In India, popular payment gateways include Razorpay, Paytm, CCAvenue, and others. Here’s a step-by-step guide to integrating a payment gateway with PHP, using Razorpay as an example:

### Step 1: Sign Up and Get API Credentials

1. **Sign Up**: Create an account on the payment gateway’s website (razorpay.com in this case).

2. **Get API Keys**: Once you have an account, go to the dashboard and generate your API keys. You will need:

– **API Key (Public Key)**

– **API Secret Key (Private Key)**

### Step 2: Install the PHP Library

Use Composer to install the payment gateway’s PHP library. For Razorpay, you can use the following command:

“`bash

composer require razorpay/razorpay

“`

### Step 3: Configure Your PHP Environment

Make sure your PHP environment is properly configured to handle cURL operations, which are typically required for making HTTP requests to the payment gateway’s API.

### Step 4: Create a Payment Page

Create a PHP file that will serve as your payment page. This page will handle the payment process.

“`php

‘order_001’,

‘amount’ => $amount, // amount in paise

‘currency’ => ‘INR’,

‘payment_capture’ => 1 // auto capture

];

$order = $api->order->create($orderData);

// Save the order ID in your database or session

$_SESSION[‘order_id’] = $order[‘id’];

?>

“`

### Step 5: Create a Form to Collect Payment

Create an HTML form that collects the necessary payment information from the user.

“`html

“`

### Step 6: Handle the Payment Verification

Create a PHP file named `verify.php` that will handle the verification of the payment.

“`php

$razorpay_order_id,

‘razorpay_payment_id’ => $razorpay_payment_id,

‘razorpay_signature’ => $signature

);

$api->utility->verifyPayment($attributes);

// Payment is successful

// Save the order and payment details in your database

echo “Payment successful”;

} catch (SignatureVerificationError $e) {

// Payment failed

echo “Payment failed: ” . $e->getMessage();

}

?>

“`

### Step 7: Test Your Integration

Before going live, thoroughly test your payment integration in a test environment provided by the payment gateway. Make sure to handle all possible scenarios, including success, failure, and error cases.

### Step 8: Go Live

Once you have tested your integration and are confident that it works correctly, you can go live by using your live API keys.

### Security and Best Practices

– Always keep your API secret key secure and never expose it in your codebase or version control.

– Use HTTPS to ensure secure communication between your server and the payment gateway.

– Validate and sanitize all user inputs to prevent security vulnerabilities.

– Implement proper error handling and logging.

Remember that each payment gateway may have its own specific integration process, so be sure to consult the documentation provided by the payment gateway you choose to use.