A PHP library allowing seamless integration of UPI payment gateways into web applications. Streamlining the checkout process and enhancing payment security for users.

UPI (Unified Payments Interface) is a popular payment method in India that allows users to make instant payments directly from their bank accounts. Integrating UPI payments into your website or app can provide a seamless and convenient payment experience for your customers. In this article, we will discuss how to integrate UPI payment gateway in PHP using GitHub as a source for the code.

GitHub is a popular platform for hosting and sharing code, making it easy for developers to collaborate on projects and access open-source code. There are several UPI payment gateway libraries available on GitHub that you can use to integrate UPI payments into your PHP application. One such library is the “UPI-PHP” library, which provides a simple and easy-to-use interface for implementing UPI payments.

To get started with integrating UPI payments into your PHP application using GitHub, follow these steps:

Step 1: Sign up for a UPI gateway provider
Before you can integrate UPI payments into your application, you need to sign up for a UPI gateway provider such as Paytm, PhonePe, Google Pay, or any other UPI provider that offers an API for integrating UPI payments. Once you have signed up for a UPI gateway provider, you will receive an API key and other credentials that you will need to use in your PHP code.

Step 2: Install UPI-PHP library
To integrate UPI payments into your PHP application, you can use the UPI-PHP library available on GitHub. You can either download the library from GitHub or use Composer to install it in your project. To install the library using Composer, run the following command in your project directory:

```
composer require upi/upi-php
```

This will download and install the UPI-PHP library in your project, making it easy to integrate UPI payments into your PHP application.

Step 3: Initialize the UPI gateway
Once you have installed the UPI-PHP library in your project, you can initialize the UPI gateway by creating an instance of the Gateway class and passing your UPI gateway provider’s API key and other credentials. Here’s an example code snippet showing how to initialize the UPI gateway using the UPI-PHP library:

```php
use UpiGateway;

$apiKey = 'YOUR_UPI_API_KEY';
$gateway = new Gateway($apiKey);
```

Replace ‘YOUR_UPI_API_KEY’ with the API key you received from your UPI gateway provider.

Step 4: Generate a transaction ID
Before processing a UPI payment, you need to generate a unique transaction ID for each payment. You can use the generateTransactionId() method provided by the UPI-PHP library to generate a unique transaction ID. Here’s an example code snippet showing how to generate a transaction ID:

```php
$transactionId = $gateway->generateTransactionId();
```

Step 5: Create a payment request
Once you have generated a transaction ID, you can create a payment request by passing the amount, transaction ID, and other details required for the payment. Here’s an example code snippet showing how to create a payment request using the UPI-PHP library:

```php
$amount = 100; // Amount in INR
$orderId = 'ORDER123456';
$customerName = 'John Doe';
$customerEmail = 'john.doe@example.com';
$customerPhone = '9876543210';

$paymentRequest = $gateway->createPaymentRequest($amount, $transactionId, $orderId, $customerName, $customerEmail, $customerPhone);
```

Step 6: Process the payment request
Once you have created a payment request, you can process the payment request by redirecting the customer to the UPI gateway provider’s payment page or using a QR code. Here’s an example code snippet showing how to redirect the customer to the UPI payment page:

```php
$paymentUrl = $paymentRequest->getPaymentUrl();
header('Location: ' . $paymentUrl);
```

Alternatively, you can also generate a QR code for the payment request using the getQrCode() method provided by the UPI-PHP library. Here’s an example code snippet showing how to generate a QR code for the payment request:

```php
$qrCode = $gateway->getQrCode($paymentRequest);
```

You can display the QR code on your website or app so that customers can scan it using their UPI payment app to make the payment.

Step 7: Handle the payment response
Once the customer has completed the payment, the UPI gateway provider will send a payment response to a callback URL specified in your payment request. You can use the handlePaymentResponse() method provided by the UPI-PHP library to handle the payment response and verify the payment status. Here’s an example code snippet showing how to handle the payment response:

```php
$paymentResponse = $gateway->handlePaymentResponse($_POST);
if ($paymentResponse->isSuccessful()) {
// Payment successful
// Update the order status and complete the transaction
} else {
// Payment failed
// Display an error message to the customer
}
```

By following these steps, you can easily integrate UPI payments into your PHP application using the UPI-PHP library available on GitHub. Using GitHub as a source for the code makes it easy to access and implement the UPI payment gateway integration in your project. With UPI becoming a popular payment method in India, integrating UPI payments into your application can help provide a seamless and convenient payment experience for your customers.