我想在不向用戶顯示萬事達(dá)卡界面的情況下集成支付部分，只會(huì)在我的網(wǎng)站上填寫他們的信息我的門戶而不是在這里萬事達(dá)卡門戶我正在嘗試使用 curl 在我的 PHP 站點(diǎn)上實(shí)現(xiàn) CommWeb。它不工作。我收到以下錯(cuò)誤消息：if ($_SERVER["REQUEST_METHOD"] == "GET") {    if (!isset($_GET['id']) || !isset($_GET['motif']) || !isset($_GET['code'])){        die("Invalid request");    }    $amount = 10000;    $id = 2;    $motif = 'save';    $action_code = 'ookkk';    $orderInfo = 'fhhsd'.$id;    $MerchTxnRef = $orderInfo.'-'.generateMerchTxnRef();    $accountData = array(        'merchant_id' => 'TESTID', // for test card        'access_code' => '77867878', // for test card        'secret'      => 'TYUJHGFDFGHJ87654567GFDFGHGF' // for test card    );    $currency_str = "USD";    $mult = 100;    $queryData = array(        'vpc_AccessCode' => $accountData['access_code'],        'vpc_Merchant' => $accountData['merchant_id'],        'vpc_Amount' => 1000000, // Multiplying by 100 to convert to the smallest unit        'vpc_OrderInfo' => $orderInfo,        'vpc_MerchTxnRef' => $MerchTxnRef,        'vpc_Command' => 'pay',        'vpc_Currency' => $currency_str,        'vpc_Locale' => 'en',        'vpc_Version' => 2,        'vpc_ReturnURL' => ('http://theeventsfactory.biz/the_events_factory/logics/payment_return.php?id='.$id.'&motif='.$motif.'&code='.$action_code),        'vpc_SecureHashType' => 'SHA256',        'vpc_CardNum' => '5123456789012346',        'vpc_CardExp' => '0521',        'vpc_CardSecurityCode'=> '123'    );    // Add secure secret after hashing    // $queryData['vpc_SecureHash'] = generateSecureHash($accountData['secret'], $queryData);    // $migsUrl = 'https://migs.mastercard.com.au/vpcpay?'.http_build_query($queryData);}這是我收到的回復(fù)vpc_Amount=0&vpc_BatchNo=0&vpc_Locale=en&vpc_Message=Required+field+vpc_Merchant+was+not+present+in+the+request&vpc_TransactionNo=0&vpc_TxnResponseCode=7 我將如何解決這個(gè)問題