<?php

require __DIR__ . "/path/to/vendor/autoload.php";

use cnp\sdk\CnpOnlineRequest;
use cnp\sdk\XmlParser;

$hash_in = array('id' => 'id',
    'card' => array('type' => 'VI',
        'number' => '4100000000000000',
        'expDate' => '1213',
        'cardValidationNum' => '1213'),
    'id' => '1211',
    'orderId' => '22@33',
    'reportGroup' => 'Planets',
    'orderSource' => 'ecommerce',
    'amount' => '0');

$initialize = new CnpOnlineRequest();
$authorizationResponse = $initialize->authorizationRequest($hash_in);
$response = XmlParser::getDomDocumentAsString($authorizationResponse);

print_r($response);
?>