Set Up PayPal SDK
- First, ensure you have Composer installed, as it's required for integrating the PayPal SDK. If not, download and install Composer on your machine.
- To install the PayPal PHP SDK, run the following command in your terminal:
composer require paypal/rest-api-sdk-php
Configure PayPal Settings
- Create a configuration file or use your existing configuration to store your PayPal credentials. Ensure your `clientId` and `clientSecret` from the PayPal developer console are correctly stored in a secure manner.
- Below is an example of how you might set up your configuration using PHP arrays:
$config = [
'clientId' => 'YOUR_CLIENT_ID',
'clientSecret' => 'YOUR_CLIENT_SECRET',
'settings' => [
'mode' => 'sandbox', // Change to 'live' for production
'http.ConnectionTimeOut' => 30,
'log.LogEnabled' => true,
'log.FileName' => '../PayPal.log',
'log.LogLevel' => 'FINE'
]
];
Initialize PayPal API Context
- Next, set up the API context, necessary for making requests to the PayPal API. This context includes your credentials and configuration settings:
use PayPal\Rest\ApiContext;
use PayPal\Auth\OAuthTokenCredential;
$apiContext = new ApiContext(
new OAuthTokenCredential(
$config['clientId'],
$config['clientSecret']
)
);
$apiContext->setConfig($config['settings']);
Create a Payment
- To enable payments, you'll need to create a payment request specifying the amount, currency, and description of the payment. Below is an example of a typical payment object in PHP:
use PayPal\Api\Payer;
use PayPal\Api\Amount;
use PayPal\Api\Transaction;
use PayPal\Api\RedirectUrls;
use PayPal\Api\Payment;
// Create a new payer
$payer = new Payer();
$payer->setPaymentMethod('paypal');
// Set the payment amount
$amount = new Amount();
$amount->setTotal('10.00');
$amount->setCurrency('USD');
// Set up the transaction
$transaction = new Transaction();
$transaction->setAmount($amount);
$transaction->setDescription('Demo payment');
// Set the redirect URLs
$redirectUrls = new RedirectUrls();
$redirectUrls->setReturnUrl("http://example.com/your_redirect_url_here")
->setCancelUrl("http://example.com/your_cancel_url_here");
// Create the payment
$payment = new Payment();
$payment->setIntent('sale')
->setPayer($payer)
->setRedirectUrls($redirectUrls)
->setTransactions([$transaction]);
Execute Payment Creation
- To execute the payment creation and facilitate user redirection to PayPal for approval, run the following code. Ensure proper error handling to capture issues like failed API calls:
try {
$payment->create($apiContext);
$approvalUrl = $payment->getApprovalLink();
// Redirect the user to PayPal for approval
header("Location: " . $approvalUrl);
exit;
} catch (Exception $e) {
echo "Payment creation failed: " . $e->getMessage();
// Log the error message in your error logs
}
Handle Payment Approval
- After the user approves the payment and is redirected back to your application, handle the returned `paymentId` and `PayerID` parameters to execute the payment:
use PayPal\Api\PaymentExecution;
// Retrieve the payment ID and payer ID from the query string
$paymentId = $_GET['paymentId'];
$payerId = $_GET['PayerID'];
// Get the payment and execute it
$payment = Payment::get($paymentId, $apiContext);
$execution = new PaymentExecution();
$execution->setPayerId($payerId);
try {
$payment->execute($execution, $apiContext);
echo "Payment successful!";
} catch (Exception $e) {
echo "Payment execution failed: " . $e->getMessage();
// Log the error for debugging
}
Additional Considerations
- Always test your PayPal integration in the sandbox environment to ensure everything is functioning correctly before moving to production.
- Implement robust error handling and logging throughout the process to capture any exceptions or API errors.
- Consider implementing webhooks for real-time updates on the payment status if your application requires it.
