PHP code example of gnurlan / gpwebpay

1. Go to this page and download the library: Download gnurlan/gpwebpay library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php.

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

gnurlan / gpwebpay example snippets




namespace App\Http\Controllers;

use Auth;
use App;
use App\Http\Controllers\Controller;
use Illuminate\Http\Request;

use Granam\GpWebPay\Settings as GpSettings;
use Granam\GpWebPay\DigestSigner;
use Granam\GpWebPay\CardPayResponse;
use Granam\GpWebPay\Codes\CurrencyCodes;
use Alcohol\ISO4217 as IsoCurrencies;
use Granam\GpWebPay\CardPayRequestValues;
use Granam\GpWebPay\CardPayRequest;
use Granam\GpWebPay\Exceptions\GpWebPayErrorByCustomerResponse;
use Granam\GpWebPay\Exceptions\GpWebPayErrorResponse;
use Granam\GpWebPay\Exceptions\ResponseDigestCanNotBeVerified;
use Granam\GpWebPay\Exceptions\Exception as GpWebPayException;

class PayController extends Controller
{
    const MERCHANT_NUMBER     = '123456789'; // your 'merchant number' given to you by GP WebPay
    const GP_PRIVATE_KEY      = 'your_private_key_downloaded_from_gp_web_pay.pem';
    const GP_PRIVATE_KEY_PASS = 'TopSecretPasswordForPrivateKey';
    const GP_PUBLIC_KEY       = 'gp_web_pay_server_public_key_also_downloaded_from_gp_web_pay.pem';

    protected $digestSigner;
    protected $settings;

    public function __construct()
    {
        $this->settings = GpSettings::createForProduction(
            storage_path(self::GP_PRIVATE_KEY),
            self::GP_PRIVATE_KEY_PASS,
            storage_path(self::GP_PUBLIC_KEY),
            self::MERCHANT_NUMBER
        // without explicit URL for response the current will be used - INCLUDING query string
        );
        $this->digestSigner = new DigestSigner($this->settings);
    }

    public function request()
    {
        $currencyCodes = new CurrencyCodes(new IsoCurrencies());
        try {
            $cardPayRequestValues = CardPayRequestValues::createFromArray($_GET, $currencyCodes);
            $cardPayRequest = new CardPayRequest($cardPayRequestValues, $this->settings, $this->digestSigner);
        } catch (GpWebPayException $exception) {
            /* show an apology to the customer
             * like "we are sorry, our payment gateway is temporarily unavailable" and log it, solve it */
            exit();
        }
        print '<html><body><form method="post" action="' . $cardPayRequest->getRequestUrl() . '">';
        foreach ($cardPayRequest as $name => $value) {
            print '<input type="hidden" name="' . $name . '" value="' . $value . '">';
        }
        print '<input type="submit" value="Confirm order"></form></body></html>';

    }

    public function response()
    {
        try {
            $response = CardPayResponse::createFromArray($_POST, $this->settings, $this->digestSigner);
        } catch(GpWebPayErrorByCustomerResponse $gpWebPayErrorByCustomerResponse) {
            // some pretty error box for customer information about HIS mistake like invalid card number
            /**
             * WARNING: do not rely blindly on this detection - for example if YOU (developer) are sending
             * card number in a hidden field, because the customer provided it to its account before and
             * does not need to enter it again, but the card number has been refused by GP WebPay,
             * you will show to the customer confusing message about an invalid card number,
             * although he does not enter it.
             * For full list of auto-detected customer
             * mistakes @see GpWebPayErrorByCustomerResponse::isErrorCausedByCustomer
             */
            echo $gpWebPayErrorByCustomerResponse->getLocalizedMessage();
        } catch(GpWebPayErrorResponse $gpWebPayErrorResponse) {
            /* GP WebPay refuses request by OUR (developer) mistake like duplicate order number
             * - show an apology to the customer and log this, solve this */
        } catch(ResponseDigestCanNotBeVerified $responseDigestCanNotBeVerified) {
            /* values in response have been changed(!),
             * show an apology (or a warning?) to the customer and probably log this for evidence */
        } catch(GpWebPayException $gpWebPayException) { // EVERY exception share this interface
            /* some generic error like processing error on GP WebPay server,
             * show an apology to the customer and log this, solve this */
        }
        /**
         * its OK, lets process $response->getParametersForDigest();
         * @see \Granam\GpWebPay\CardPayResponse::getParametersForDigest
         */
    }

}