payment.php

См. документацию.

<?
 
CCurrencyLang::disableUseHideZero();
 
$orderId = (int)$GLOBALS["SALE_INPUT_PARAMS"]["ORDER"]["ID"];
 
if ($orderId > 0)
{
    $order = \Bitrix\Sale\Order::load($orderId);
    if ($order)
    {
        $paymentCollection = $order->getPaymentCollection();
        if ($paymentCollection)
        {
            foreach ($paymentCollection as $payment)
            {
                if (!$payment->isInner())
                    break;
            }
            if ($payment)
            {
                $context = \Bitrix\Main\Application::getInstance()->getContext();
                $service = \Bitrix\Sale\PaySystem\Manager::getObjectById($payment->getPaymentSystemId());
                if ($_REQUEST['pdf'] && $_REQUEST['GET_CONTENT'] == 'Y')
                {
                    $result = $service->initiatePay($payment, $context->getRequest(), \Bitrix\Sale\PaySystem\BaseServiceHandler::STRING);
                    if ($result->isSuccess())
                        return $result->getTemplate();
                }
 
                $result = $service->initiatePay($payment, $context->getRequest());
            }
            CCurrencyLang::enableUseHideZero();
        }
    }
}
?>