sakura/_sakura/vendor/paypal/rest-api-sdk-php/sample/payments/ExecutePayment.php

<?php
// #Execute Payment Sample
// This is the second step required to complete
// PayPal checkout. Once user completes the payment, paypal
// redirects the browser to "redirectUrl" provided in the request.
// This sample will show you how to execute the payment
// that has been approved by
// the buyer by logging into paypal site.
// You can optionally update transaction
// information by passing in one or more transactions.
// API used: POST '/v1/payments/payment/<payment-id>/execute'.

require __DIR__ . '/../bootstrap.php';
use PayPal\Api\Amount;
use PayPal\Api\Details;
use PayPal\Api\ExecutePayment;
use PayPal\Api\Payment;
use PayPal\Api\PaymentExecution;
use PayPal\Api\Transaction;

// ### Approval Status
// Determine if the user approved the payment or not
if (isset($_GET['success']) && $_GET['success'] == 'true') {

    // Get the payment Object by passing paymentId
    // payment id was previously stored in session in
    // CreatePaymentUsingPayPal.php
    $paymentId = $_GET['paymentId'];
    $payment = Payment::get($paymentId, $apiContext);

    // ### Payment Execute
    // PaymentExecution object includes information necessary
    // to execute a PayPal account payment.
    // The payer_id is added to the request query parameters
    // when the user is redirected from paypal back to your site
    $execution = new PaymentExecution();
    $execution->setPayerId($_GET['PayerID']);

    // ### Optional Changes to Amount
    // If you wish to update the amount that you wish to charge the customer,
    // based on the shipping address or any other reason, you could
    // do that by passing the transaction object with just `amount` field in it.
    // Here is the example on how we changed the shipping to $1 more than before.
    $transaction = new Transaction();
    $amount = new Amount();
    $details = new Details();

    $details->setShipping(2.2)
        ->setTax(1.3)
        ->setSubtotal(17.50);

    $amount->setCurrency('USD');
    $amount->setTotal(21);
    $amount->setDetails($details);
    $transaction->setAmount($amount);

    // Add the above transaction object inside our Execution object.
    $execution->addTransaction($transaction);

    try {
        // Execute the payment
        // (See bootstrap.php for more on `ApiContext`)
        $result = $payment->execute($execution, $apiContext);

        // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
        ResultPrinter::printResult("Executed Payment", "Payment", $payment->getId(), $execution, $result);

        try {
            $payment = Payment::get($paymentId, $apiContext);
        } catch (Exception $ex) {
            // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
 	        ResultPrinter::printError("Get Payment", "Payment", null, null, $ex);
            exit(1);
        }
    } catch (Exception $ex) {
        // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
 	    ResultPrinter::printError("Executed Payment", "Payment", null, null, $ex);
        exit(1);
    }

    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
    ResultPrinter::printResult("Get Payment", "Payment", $payment->getId(), null, $payment);

    return $payment;


} else {
    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
    ResultPrinter::printResult("User Cancelled the Approval", null);
    exit;
}