Web Application

Paypal Express Checkout Integration with Laravel 5

What is PayPal?

PayPal is a company operating a worldwide online payments system that supports online money transfers and serves as an electronic alternative to the traditional money exchange system. The company operates as a payment gateway for online sellers, auction sites, and many other commercial users, for that it charges a fee in exchange for benefits. PayPal’s payment system is also called PayPal short.

What is the Payment Gateway?

A payment gateway is a merchant service provided by an any-commerce application service provider that authorizes credit card or direct payments processing fore-businesses, online retailers, bricks and clicks, or traditional brick and mortar. The payment gateway is used provided by a bank to its customers but can be provided by a specialized financial service provider as a separate service, such as a payment service provider. A payment gateway facilitates a payment transaction by the transfer of information between a payment portal (such as a website or mobile phone) and the front-end processor or acquiring the bank.

Configuring PayPal in Your App

• First, we will install the PayPal SDK using composer.

composer require paypal/rest-api-sdk-php


• Next, we need to login into PayPal developer mode, create a new sandbox account, and get some keys like client_id and secret for testing this integration.
• Login to developer.paypal.com to create a merchant account, so that you can sell or credit funds to your account.
• You can also create an account, to buy from some merchant.

create account for merchant

• We have created both merchant and buyer test accounts.
• You will have to create a new app to get the client_id and secret keys.

create new app

• After creating your app click on the app it shows you client_id and secret keys.
• Copy CLIENT_ID, SECRET and paste those in your .env file for security.

PAYPAL_CLIENT_ID=
PAYPAL_SECRET=
PAYPAL_MODE=sandbox

• Next, we will create a new file paypal.php, at \ config directory.
• Place the following content in the file

<?php
return [
       ‘client id' => env(‘PAYPAL_CLIENT_ID’ , ‘ ’),
       ‘secret' => env( 'PAYPAL_SECRET' , ‘ ’),
       ‘settings' => array(
             ‘mode' => env( 'PAYPAL_MODE' , sandbox'),
             ‘http.ConnectionTimeOut' => 30,
             ‘log . LogEnabled’ => true,
             ‘log. FileName' => storage_path( ) . ‘/logs/paypal.log’,
             ‘log . LogLevel => ‘ERROR’
        ),
];

PayPal Payment Form

You can add any form, the way you want, here for demo purposes, We just have 1 input field to enter an amount and a button to submit a form.

<form class=”w3-container w3-display-middle w3-card-4” method=”POST” ids=”payment-forms” action="/payment/add-funds/paypal”> 

{{ csrf_field() }} 
      <h2 class=w3-text-blue”>Payment Form</h2> 
      <p>Demo Paypal form - Integrating paypal in laravel</p> 
      <p> 
            <label class=”w3-text-blue”><b>Enter Amount</b></label> 
            <input class=”wg3-input w3-border” name=”amount" type=”text”> 
      </p> 
      <button class=”w3-btn w3-blue”>Pay with PayPal</button> 
</form> 
paypal payment form

PayPal Payment Controller

We will create a new controller to manage all the PayPal-related PHP stuff.

php artisan make:controller PaymentController 

The above command will create a new controller at /app/http/Controllerswith name PaymentController

First We will initialize the PayPal configuration and settings in the _construct function.
So now after the amount is entered in the form and when clicked on the ‘Pay with PayPal’ button, the following function executes.

public function __construct( )
{
        /** PayPal api context  **/
        $paypal_conf = \Config: :get (‘paypal’);
        $this ->_api_context = new ApiContext(new OAuthTokenCredential (
             $paypal_conf [‘client_id’], 
             $paypal_conf [‘secret’] )
        );
        $this >_api_context->setConfig($paypal_conf[ 'settings ' ] ); 
}
public function payWithpaypal(Request $request) 
{
            $payer = new Payer(); 
                           $payer->setPaymentmethod( 'paypal'); 
            $item_1 new Item(); 
            $item_1 -> setName('Item 1’) /** item name */ 
                                      ->setCurrency( 'USD') 
                                      ->setQuantity(1) 
                                      ->setPrice($request->get( 'amount ' )); /** unit price **/
            $item_list = new ItemList(); 
                          $item_list=setItems(array($item_1)); 
            $amount = new Amount(); 
                          $amount -> setCurrency ( ‘USD’ ) 
                                   ->setTotal($request -> get ( 'amount ' )); 
            $transaction = new Transaction(); 
                           $transaction -> setAmount($amount) 
                                 ->setItemList($Item_list) 
                                 ->setDescription('Your transaction description'); 
            $redirect_urls = new RedirectUrls(); 
                           $redirect_urls -> setReturnUrl (URL: : roote (‘status’)) /** Specify return URL **/
                                 ->setCancelUrl(URL : : route( ‘status’ )); 
            $payment = new Payment(); 
                           $payment -> setIntent( ‘Sale’ ) 
                                 ->setPayer($payer) 
                                 ->setRedirectUrls($redirect_urls) 
                                 ->setTransactions(array($transaction)); 

/** dd( $payment->create( $this->_api_context));exit; **/ 
try {
             $payment->create( $this->_api_context); 
} catch (\PayPal Exception\PPConnectionException $ex) { 
             
             if (\Config::get('app. debug')) {
                  \Session::put('error', 'Connection timeout');
                 return Redirect::route('paywithpaypal"); 
            } else {
                  \Session::put('error', 'Some error occur, sorry for inconvenient'); 
            return Redirect::route('paywithpaypal');
            }
}

foreach ($payment->getLinks() as $link) { 
           if ($link->getRel() == 'approval_url') {
                $redirect_url = $link->getHref(); 
                break;
           }
}

/** add payment ID to session **/ 
Session::put('paypal_payment_id', $payment->getId());

if (isset($redirect_url)) {
         /** redirect to paypal **/ 
         return Redirect:: away($redirect_url);
}

\Session::put('error' , 'Unknown error occurred'); 
return Redirect : : route('paywithpaypal');

}

In the above function, the terminology like Payer, Item is all from the PayPal SDK, so let me explain those terminologies from PayPal official docs.

Payer

A resource representing a Payer that funds a payment For PayPal account payments, set payment method to PayPal.

$payer = new Payer(); 
$payer->setPaymentMethod("paypal");

Item information

(Optional) Lets you specify item-wise information

$item_1 = new Item(); 
$item_1->setName( 'Item 1') /** item name **/
                        ->setCurrency( 'USD') 
                        ->set Quantity(1)
                        ->setPrice($request->get('amount')); /** unit price **/ 
$item_list = new ItemList();
              $item_list->setItems(array($item_1));

Amount

Let’s you specify a payment amount. You can also specify additional charges such as shipping, tax.

$amount = new Amount(); 
$amount->setCurrency( 'USD')
                ->setTotal($request->get('amount'));

Transaction

A transaction defines the contract of payment — what is the payment for and who is fulfilling it.

$transaction = new Transaction(); 
$transaction->setAmount($amount)
               ->setItemList($item_list) 
               ->setDescription( 'Your transaction description');

Redirect URLs

Set the URLs that the buyer must be redirected to after payment approval/cancellation.

$redirect_urls = new RedirectUrls(); 
$redirect_urls->setReturnurl(URL: : route('status')) /** Specify return URL **/

Payment

A Payment Resource; create one using the above types and intent set to ‘sale’

$payment = new Payment(); 
$payment = new Payment(); 
$payment->setIntent('Sale')
         ->setPayer($payer) 
         ->setRedirectUrls($redirect_urls) 
         ->setTransactions(array( $transaction));

Create Payment

Create a payment by calling the ‘create’ method passing it a valid API context. (See bootstrap.php for more on ApiContext) The returned object contains the state and the URL to which the buyer must be redirected for payment approval

$payment->create( $this->_api_context);

PayPal Payment Status

So after the payment is made, we need to tell the user whether the payment is a success or a failure. The following function executes after payment is processed.

public function getPaymentstatus() 
{ 
 /** Get the payment ID before session clear **/ 
$payment_id = Session::get('paypal_payment_id' ); 
/** clear the session payment ID **/ 
Session::forget('paypal_payment_id'); 
            if (empty(Input::get( 'PayerID' )) || empty(Input::get('token' ))) { 
            \Session::put('error', 'Payment failed'); 
            return Redirect::route('/'); 
            }
$payment = Payment::get($payment_id, $this->_api_context); 
$execution = new PaymentExecution; 
$execution->setPayerId(Input::get( 'PayerID')); 

/**Execute the payment **/ 
$result = $payment->execute( $execution, $this->_api_context); 
if ($result->getState() == 'approved') { 
     \Session::put('success', 'Payment success’); 
     return Redirect::route('/'); 
}
\Session::put('error', 'Payment failed'); 
return Redirect::route('/');
}

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.

$payment = Payment::get($payment_id, $this->_api_context);

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’s Website to your site.

$execution = new PaymentExecution(); 
$execution->setPayerId(Input::get( 'PayerID')); 
/**Execute the payment **/ 
$result = $payment->execute($execution, $this->_api_context);

And finally, if the result of the payment is a success, we will show a success message and a failure message if the payment fails.

if ($result->getState() == 'approved') {
    \Session::put('success', 'Payment success'); 
    return Redirect::route('/');
}

\Session::put('error', 'Payment failed'); 
return Redirect::route('/');

We will store the messages in the Session and show them in the view.

@if ($message = Session::get('success')) 
        <div class="w3-panel w3-green w3-display-container"> 
               <span onclick="this.parentElement.style.display='none' “
                           class="w3-button w3-green w3-large w3-display-topright">&times;</span>          
               <p>{!! $message !!}</p> 
        </div> 
        <?php Session:: forget('success'); ?>
        @endif 

@if ($message = Session::get('error')) 
       <div class="w3-panel w3-red w3-display-container"> 
             <span onclick="this.parentElement.style.display='none' "
                         class="w3-button w3-red w3-large w3-display-topright">&times;</span> 
            <p>{!! $message !!}</p> 
       </div>
<?php Session:: forget('error'); ?> 
@endif 

Check out the images below,

Enter Some Amount,

paywith paypal

Logging With Test Buyer Account,

login with test buyer

PayPal Payment Page,

paypal payment page

Success Message,

payment success

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Milap Chavda

Milap Chavda is a Digital Marketing Expert at one of the fast-growing, global, web, mobile app and software development company, OneClick IT Consultancy. He does blogging as a hobby and loves to write on startup, business, mobile technologies and app development.

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