Multi-Provider Payment SDK (PayPal & Stripe)

This package is an enhanced multi-provider payment SDK that supports both PayPal and Stripe payment processing through a unified interface. It provides a simple, fluent API to create, capture, and refund payments with both sandbox and production environments supported.

Features:

• ✅ Unified interface for PayPal and Stripe payments
• ✅ Complete refund functionality for both providers
• ✅ Order creation and capture
• ✅ Sandbox and production environment support
• ✅ Comprehensive error handling
• ✅ Full working examples included

Installation

PayPal Checkout SDK Package requires PHP 7.4 or higher.

INFO: If you are using an older version of php this package may not function correctly.

The supported way of installing PayPal Checkout SDK package is via Composer.

composer require phpjuice/paypal-checkout-sdk

Quick Start Examples

This SDK includes comprehensive working examples to get you started quickly:

Available Example Files

• example_usage.php - Basic usage examples for both PayPal and Stripe
• corrected_test.php - Corrected PayPal implementation example
• working_example_with_refunds.php - Complete example with refund functionality
• example_refund_usage.php - Dedicated refund examples and advanced usage

Running the Examples

1. Replace credential placeholders with your actual API keys in any example file
2. Run: php example_usage.php (or any other example file)
3. Follow the output instructions for completing payments

Setup

Credentials Setup

PayPal Credentials

Get client ID and client secret from PayPal Developer Console:

• Create a new REST API app
• Copy Client ID and Client Secret

Stripe Credentials

Get API keys from Stripe Dashboard:

• Copy Secret Key (starts with sk_)
• Copy Publishable Key (starts with pk_)

Basic Provider Setup

use PayPal\Checkout\Factory\PaymentProviderFactory;

// PayPal Provider
$paypalProvider = PaymentProviderFactory::create('paypal', 'sandbox', [
    'client_id' => 'your_paypal_client_id',
    'client_secret' => 'your_paypal_client_secret'
]);

// Stripe Provider  
$stripeProvider = PaymentProviderFactory::create('stripe', 'sandbox', [
    'secret_key' => 'sk_test_your_stripe_secret_key',
    'publishable_key' => 'pk_test_your_stripe_publishable_key'
]);

Usage

Creating Orders (Unified Interface)

The same code works for both PayPal and Stripe providers:

use PayPal\Checkout\Orders\Order;
use PayPal\Checkout\Orders\PurchaseUnit;
use PayPal\Checkout\Orders\Amount;

// Create order (same for both providers)
$order = new Order();
$order->setIntent('CAPTURE');

// Create purchase unit
$purchaseUnit = new PurchaseUnit();
$purchaseUnit->setAmount(new Amount('100.00', 'USD'));
$purchaseUnit->setReferenceId('order-' . time());

$order->addPurchaseUnit($purchaseUnit);

// Create payment with either provider
$response = $paymentProvider->createOrder($order);
$responseData = json_decode($response->getBody(), true);

echo "Payment ID: " . $responseData['id'];

PayPal-Specific Usage

// PayPal returns approval URL for customer
foreach ($responseData['links'] as $link) {
    if ($link['rel'] === 'approve') {
        echo "Customer Approval URL: " . $link['href'];
        break;
    }
}

Stripe-Specific Usage

// Stripe returns client_secret for frontend integration
echo "Client Secret: " . $responseData['client_secret'];

Refund Processing

Both providers support full and partial refunds through a unified interface:

use PayPal\Checkout\Refunds\RefundRequest;

// Create refund request
$refundRequest = new RefundRequest('25.00', 'USD'); // Partial refund
$refundRequest->setInvoiceId('refund-' . time())
             ->setNoteToPayer('Refund processed as requested')
             ->setReason('requested_by_customer');

// Process refund (works with both PayPal capture IDs and Stripe payment intent IDs)
$refundResponse = $paymentProvider->refundPayment($paymentId, $refundRequest);

Order Details

Retrieve order/payment details:

// Get order details (works for both providers)
$detailsResponse = $paymentProvider->showOrder($orderId);
$details = json_decode($detailsResponse->getBody(), true);

Example Files Overview

example_usage.php

Complete basic usage examples demonstrating:

• PayPal and Stripe payment creation
• Order details retrieval
• Dynamic provider selection
• Error handling patterns

corrected_test.php

Focused PayPal example showing:

• Proper PayPal order structure
• JSON output for debugging
• Comprehensive error handling
• Working PayPal implementation

working_example_with_refunds.php

Comprehensive example featuring:

• Multi-provider payment creation (PayPal & Stripe)
• Complete refund functionality for both providers
• Refund request creation and processing
• Summary of all implemented features

example_refund_usage.php

Dedicated refund examples including:

• Full and partial refund processing
• Advanced refund request configuration
• Multi-provider refund testing
• Production-ready refund patterns

Getting Started

1. Choose the example file that best matches your needs
2. Replace credential placeholders with your actual API keys
3. Run: php filename.php
4. Follow console output for next steps

Changelog

Please see the changelog for more information on what has changed recently.

Contributing

Please see CONTRIBUTING.md for details and a todo list.

Security

If you discover any security related issues, please email author instead of using the issue tracker.

Credits

• PayPal Developer Documentation
• Stripe API Documentation
• Original PayPal SDK

License

Please see the LICENSE file for more information.