Execute payment php code

<?php
ini_set('error_reporting', E_ALL);
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);


// #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__  . '/PayPal-PHP-SDK/autoload.php';

// After Step 1
$apiContext = new \PayPal\Rest\ApiContext(
    new \PayPal\Auth\OAuthTokenCredential(
        'GET_THIS_CODE_IN_DEVELOPER.PAYPAL.COM',     // ClientID
        'GET_THIS_CODE_IN_DEVELOPER.PAYPAL.COM'      // ClientSecret
    )
);

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['token'])) {
    // Get the payment Object by passing paymentId
    // payment id was previously stored in session in
    // CreatePaymentUsingPayPal.php

    $_GET['token'] = strtoupper($_GET['token']);

    if (isset($_GET['paymentId'])) { $paymentId = strtoupper($_GET['paymentId']); }
    if (isset($_GET['paymentid'])) { $paymentId = strtoupper($_GET['paymentid']); $_GET['paymentId'] = $paymentId;}

    //$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();

    if (isset($_GET['PayerID'])) { $temPayerId = strtoupper($_GET['PayerID']); }
    if (isset($_GET['payerid'])) { $temPayerId = strtoupper($_GET['payerid']); $_GET['PayerID'] = $temPayerId;}

    $execution->setPayerId(strtoupper($temPayerId));
    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, $result);
        print_r($payment->getId());
        echo "<h2>Your payment was <span>successfully proccessed!</span></h2>";

        //print_r($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, $ex);
            print_r($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, $ex);
        print_r($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, $payment);
    print_r($payment);
    return $payment;
} else {
    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
    echo "User Cancelled the Approval";
    exit;
}
?>