README

The KhaltiSdk is a PHP library for integrating the Khalti payment gateway into your application. This library simplifies the process of initializing payments, validating transactions, and more.

Installation

To use this library, you'll need to include it in your project. You can install it via Composer. If you don't have Composer installed, you can download it from getcomposer.org.

Step-by-step Installation

1. Install Composer:

   curl -sS https://getcomposer.org/installer | php
   mv composer.phar /usr/local/bin/composer

2. Add the package to your project:

   composer require xentixar/khalti-sdk

3. Include Composer's autoloader in your script:

   require_once __DIR__ . '/vendor/autoload.php';

Usage

Setting Up the Khalti Instance

Create a new instance of the Khalti class and set your secret key using the setSecretKey method. The secret key is required for authorization when making API requests.

Example Code

<?php

use Xentixar\KhaltiSdk\Khalti;

require_once __DIR__ . "/vendor/autoload.php";

$khalti = new Khalti();

// Set your Khalti secret key
$khalti->setSecretKey('test_secret_key_1392a63451d740c59806685acd57730a');

// Configure the payment details
$khalti->config(
    'http://localhost:8000/decode.php',  // Return URL
    'http://localhost:8000',            // Website URL
    10,                                 // Amount in rupees
    '124',                              // Purchase Order ID
    'test',                             // Purchase Order Name
    [                                   // Customer Information
        "name" => "Khalti Bahadur",
        "email" => "example@gmail.com",
        "phone" => "9800000000"
    ]
);

// Initiate the payment
$khalti->init();
?>

Configuration Details

The config method allows you to specify several parameters:

• $return_url: The URL where the user will be redirected after payment.
• $website_url: Your website's URL.
• $amount: The payment amount in rupees.
• $purchase_order_id: A unique identifier for the purchase order.
• $purchase_order_name: The name of the purchase order.
• $customer_info: An optional array containing customer details (name, email, phone).
• $amount_breakdown: Optional breakdown of the amount (e.g., tax, shipping).
• $product_details: Optional product details.

Initiating a Payment

The init method sends a request to the Khalti API to initiate the payment process. It handles the request server-side, and if the response contains a payment_url, it redirects the user to the Khalti payment page.

Note: For production, set the $production flag to true in the init method.

$khalti->init(true); // Set to true for production

Validating a Transaction

To validate a transaction, use the validate method. This method sends a request to the Khalti API to check the status of a transaction.

$response = $khalti->validate('transaction_code_here');

if ($response) {
    // Handle the response
    echo $response;
} else {
    echo "Error: Invalid response from Khalti API.";
}

Note: For production, set the $production flag to true in the validate method.

$response = $khalti->validate('transaction_code_here', true); // Set to true for production

Decoding the Response

To decode the response data from Khalti:

$data = $khalti->decode();
if ($data) {
    // Process the data
    print_r($data);
} else {
    echo "Error: No data to decode.";
}

Error Handling

The init method includes basic error handling for cURL requests. You may want to add additional error handling based on your application's requirements.

Contribution

Contributions are welcome! Please submit a pull request or create an issue to report bugs or request features.

License

This library is licensed under the MIT License. See the LICENSE file for more details.

Additional Resources

• Khalti API Documentation
• Official Khalti Website