Php 亚马逊产品广告API |如何获得客户评论计数&；具有SearchItems端点的星级评定

我正在试图找到一种方法，如何从搜索结果中获得每个项目的客户评论。文档（）中有许多用于不同数据的参数，但不幸的是，没有用于客户评论和星级评定的参数。请帮我做这个。谢谢

$host = "webservices.amazon.de";

$path = "/paapi5/searchitems";

$searchItemRequest = new AwsSearchItemsRequest();

$searchItemRequest->PartnerType = "Associates";

$searchItemRequest->PartnerTag = $aws_tag;

$searchItemRequest->Keywords = $query;

$searchItemRequest->SearchIndex = "All";

$searchItemRequest->SortBy = "Relevance";

$searchItemRequest->Resources = ["Images.Primary.Medium", "ItemInfo.Title", "Offers.Listings.Price"];

$payload = json_encode($searchItemRequest);

$awsv4 = new AwsV4 ($aws_key_ID, $aws_secret);

$awsv4->setRegionName("eu-west-1");

$awsv4->setServiceName("ProductAdvertisingAPI");

$awsv4->setPath($path);

$awsv4->setPayload($payload);

$awsv4->setRequestMethod("POST");

$awsv4->addHeader('content-encoding', 'amz-1.0');

$awsv4->addHeader('content-type', 'application/json; charset=utf-8');

$awsv4->addHeader('host', $host);

$awsv4->addHeader('x-amz-target', 'com.amazon.paapi5.v1.ProductAdvertisingAPIv1.SearchItems');

我现在的回应是：

stdClass Object(
[ASIN] => B0734WVDW2
[DetailPageURL] => https://www.amazon.de/dp/B0734WVDW2?tag=hauto-21&linkCode=osi&th=1&psc=1
[Images] => stdClass Object
    (
        [Primary] => stdClass Object
            (
                [Medium] => stdClass Object
                    (
                        [Height] => 114
                        [URL] => https://m.media-amazon.com/images/I/41CYeyB6jrL._SL160_.jpg
                        [Width] => 160
                    )
            )
    )
[ItemInfo] => stdClass Object
    (
        [Title] => stdClass Object
            (
                [DisplayValue] => HRB Zinkgießkanne 5 oder 10 L, Gießkanne feuerverzinkt, Metallgießkanne (Zinkgießkanne, 10 L)
                [Label] => Title
                [Locale] => de_DE
            )
    )

[Offers] => stdClass Object
    (
        [Listings] => Array
            (
                [0] => stdClass Object
                    (
                        [Id] => J8%2BgHqpEblLKMdD3B6CytebPfSjI1yJB8OpUhIrZIircShyaOYi5G%2B1vAP%2BqOweeEcp37dN%2BPr%2FFFbjT%2F3YGQpF4rQlRe1VG6BfbTGe32fM6ucm3PGvhGkC%2F6bPgbZ32Fo9WOcmQZfjUMxMN6n4leg%3D%3D
                        [Price] => stdClass Object
                            (
                                [Amount] => 19.99
                                [Currency] => EUR
                                [DisplayAmount] => 19,99 €
                            )
                        [ViolatesMAP] => 
                    )
            )
    ))