Initialize PayPal SDK
- Install the PayPal PHP SDK for easy interaction with PayPal's API. You can do this by utilizing Composer:
composer require paypal/rest-api-sdk-php
Set Up Environment and Credentials
- Configure your environment variables such as `clientId`, `clientSecret`, and set your mode to `sandbox` or `live` depending on your needs. Ensure you securely store these credentials.
$clientId = "YOUR_CLIENT_ID";
$clientSecret = "YOUR_CLIENT_SECRET";
$environment = new \PayPalCheckoutSdk\Core\SandboxEnvironment($clientId, $clientSecret);
$client = new \PayPalCheckoutSdk\Core\PayPalHttpClient($environment);
Create an Order
- Define the order details including the amount, currency, and description. Then, create an order by sending a POST request to PayPal's Orders API.
use PayPalCheckoutSdk\Orders\OrdersCreateRequest;
$request = new OrdersCreateRequest();
$request->prefer('return=representation');
$request->body = [
"intent" => "CAPTURE",
"purchase_units" => [
[
"amount" => [
"currency_code" => "USD",
"value" => "100.00"
]
]
]
];
try {
$response = $client->execute($request);
echo "Order ID: " . $response->result->id;
} catch (HttpException $ex) {
echo $ex->statusCode;
print_r($ex->getMessage());
}
Capture an Order
- Once the order is approved, execute a capture command on the previously created order. Check for a successful response to confirm the capture.
use PayPalCheckoutSdk\Orders\OrdersCaptureRequest;
$request = new OrdersCaptureRequest($response->result->id);
$request->prefer('return=representation');
try {
$capture = $client->execute($request);
echo "Capture ID: " . $capture->result->id;
} catch (HttpException $ex) {
echo $ex->statusCode;
print_r($ex->getMessage());
}
Handle Webhook Events
- To ensure your system acknowledges various events like order completion or payment cancellations, set up webhooks in your PayPal developer account to receive event notifications.
- Implement logic in your endpoint to respond to PayPal's POST notifications, allowing you to handle asynchronous events effectively.
$payload = file_get_contents('php://input');
$headers = getallheaders();
$signatureVerification = new \PayPalCheckoutSdk\Webhooks\WebhookEventVerifySignature();
try {
$verificationResult = $client->execute($signatureVerification);
// Process webhook event data here
} catch (Exception $e) {
http_response_code(400);
exit();
}
http_response_code(200);
Testing and Validation
- Thoroughly test your integration using PayPal's sandbox environment to simulate various order scenarios and transactions without impacting real accounts.
- After successful validation and testing, switch to the live environment for production use by changing the client environment configuration.
