Php 如何使用Amazon MWS API通过卖家ID在Amazon中获取产品

我正在使用Amazon MWS API创建我自己的网站，该网站将从Amazon导入我的产品。。 但我不知道如何使用我的卖家ID在亚马逊获取我的产品

require_once('config.inc.php');


$serviceUrl = "https://mws.amazonservices.com/Products/2011-10-01"; 

$config = array (
'ServiceURL' => $serviceUrl,
'ProxyHost' => null,
'ProxyPort' => -1,
'ProxyUsername' => null,
'ProxyPassword' => null,
'MaxErrorRetry' => 3,
);


$service = new MarketplaceWebServiceProducts_Client(
    AWS_ACCESS_KEY_ID,
    AWS_SECRET_ACCESS_KEY,
    APPLICATION_NAME,
    APPLICATION_VERSION,
    $config);


$request = newMarketplaceWebServiceProducts_Model_ListMatchingProductsRequest();
 $request->setSellerId(A1234V999SASDF);

invokeListMatchingProducts($service, $request);


    functioninvokeListMatchingProducts(MarketplaceWebServiceProducts_Interface $service, $request)
 {
  try {
    $response = $service->ListMatchingProducts($request);

    echo ("Service Response\n");
    echo  ("=============================================================================\n");

    $dom = new DOMDocument();
    $dom->loadXML($response->toXML());
    $dom->preserveWhiteSpace = false;
    $dom->formatOutput = true;
    echo $dom->saveXML();
    echo("ResponseHeaderMetadata:".$response->getResponseHeaderMetadata() . "\n");

  } catch (MarketplaceWebServiceProducts_Exception $ex) {
 echo("Caught Exception: " . $ex->getMessage() . "\n");
 echo("Response Status Code: " . $ex->getStatusCode() . "\n");
 echo("Error Code: " . $ex->getErrorCode() . "\n");
 echo("Error Type: " . $ex->getErrorType() . "\n");
 echo("Request ID: " . $ex->getRequestId() . "\n");
 echo("XML: " . $ex->getXML() . "\n");
 echo("ResponseHeaderMetadata: " . $ex->getResponseHeaderMetadata() . "\n");
 }

它有一个错误

PHP致命错误：在第16行的/var/www/html/amazon/src/MarketplaceWebServiceProducts/Samples/listMatching.PHP中找不到类“MarketplaceWebServiceProducts_Client”

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你能发布你目前拥有的代码，以便我们看到你需要更改什么吗？先生，我正在使用API，因此它有很多代码。是的，但你在获取产品方面具体尝试了哪些代码？不，不使用示例代码。太可怕了。