未捕获的错误：找不到类“ Keepa \ KeepaAPI”

Question

我使用了 keepa api ，并且还运行了

这样的composer命令

composer require keepa/php_api:*

但仍低于显示错误

的错误

  

致命错误：未捕获的错误：找不到类'Keepa \ KeepaAPI'   /home/sysadmin/share/magento/keepaapi/php_api/index.php:15堆栈   跟踪：抛出＃0 {main}   /home/sysadmin/share/magento/keepaapi/php_api/index.php，第15行

和我的根目录文件夹结构

下面是发生错误时的代码

<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);

use Keepa\API\Request;
use Keepa\API\ResponseStatus;
use Keepa\helper\CSVType;
use Keepa\helper\CSVTypeWrapper;
use Keepa\helper\KeepaTime;
use Keepa\helper\ProductAnalyzer;
use Keepa\helper\ProductType;
use Keepa\KeepaAPI;
use Keepa\objects\AmazonLocale;

$api = new KeepaAPI("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
$r = Request::getProductRequest(AmazonLocale::DE, 0, "2015-12-31", "2018-01-01", 0, true, ['B001G73S50']);

$response = $api->sendRequestWithRetry($r);

switch ($response->status) {
    case ResponseStatus::OK:
        // iterate over received product information
        foreach ($response->products as $product){
            if ($product->productType == ProductType::STANDARD || $product->productType == ProductType::DOWNLOADABLE) {

                //get basic data of product and print to stdout
                $currentAmazonPrice = ProductAnalyzer::getLast($product->csv[CSVType::AMAZON], CSVTypeWrapper::getCSVTypeFromIndex(CSVType::AMAZON));

                //check if the product is in stock -1 -> out of stock
                if ($currentAmazonPrice == -1) {
                    echo sprintf("%s %s is currently not sold by Amazon (out of stock) %s",$product->asin,$product->title,PHP_EOL);
                } else {
                    echo sprintf("%s %s Current Amazon Price: %s %s",$product->asin,$product->title,$currentAmazonPrice,PHP_EOL);
                }

                // get weighted mean of the last 90 days for Amazon
                $weightedMean90days = ProductAnalyzer::calcWeightedMean($product->csv[CSVType::AMAZON], KeepaTime::nowMinutes(),90, CSVTypeWrapper::getCSVTypeFromIndex(CSVType::AMAZON));

            } else {

            }
        }
        break;
    default:
        print_r($response);
}