PHP code example of granam / gpwebpay

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

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

    

granam / gpwebpay example snippets

namespace Foo\Bar;

use Granam\GpWebPay\Settings;
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;

// SET UP
$settings = Settings::createForProduction(
    __DIR__ . '/foo/bar/your_private_key_downloaded_from_gp_web_pay.pem',
    'TopSecretPasswordForPrivateKey',
    __DIR__ . '/foo/bar/gp_web_pay_server_public_key_also_downloaded_from_gp_web_pay.pem',
    '123456789' // your 'merchant number' given to you by GP WebPay
    null // without explicit URL for response the current will be used - INCLUDING query string
);
$digestSigner = new DigestSigner($settings);

// RESPONSE
if (count($_POST) > 0) {
    try {
        $response = CardPayResponse::createFromArray($_POST, $settings, $digestSigner);
    } catch (GpWebPayErrorByCustomerResponse $gpWebPayErrorByCustomerResponse) {
        // some pretty error box for customer information about HIS mistake (for example "an 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 YOUR (developer) mistake (for example "a 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 an 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 (or just try again later, it happens) */
    }
    /**
     * it is OK, lets process $response->getParametersForDigest();
     * @see \Granam\GpWebPay\CardPayResponse::getParametersForDigest
     */
} else { // REQUEST
    $currencyCodes = new CurrencyCodes(new IsoCurrencies());
    try {
        $cardPayRequestValues = CardPayRequestValues::createFromArray($_POST, $currencyCodes);
        $cardPayRequest = new CardPayRequest($cardPayRequestValues, $settings, $digestSigner);
    } catch (GpWebPayException $exception) {
        /* show an apology to the customer
         * (for example "we are sorry, our payment gateway is temporarily unavailable") and log it, solve it */
        exit(); // exit in the middle of a script is not a good idea - this is just a fast-and-dirty example
    }