S3对象下载量的限制

Question

鉴于以下代码段，我循环并下载了一个文件数组。如果文件列表大于50个对象，那就好了，那就是它。亚马逊是否对我可以一次下载的对象数量有限制？如果是的话，是否有解决方法，或者我只是做错了？同样，一切都适用于50个以下的文件。

只是为了澄清，目的是为某人下载生成一个zip文件。文件列表可能从几个文件到几百个不等。

 if ($zip->open($path, ZipArchive::CREATE)){
            foreach($sheets as $sheet){
                // the saved file name as it exists on the server...
                $keyname = $sheet.".pdf";

                // the new name of the file, what it was originaly uploaded as
                $sql = "SELECT * FROM files WHERE id=$sheet";
                if ($result = $mysqli->query($sql)) {
                    while($row = $result->fetch_assoc()) {
                        $saveas = $row['number']."-".$row['name'].".pdf";
                    }
                }

                // Save object locally (downloads directory) to a file.
                $filepath = "/var/www/html/downloads/".$saveas;
                $result = $client->getObject(array(
                    'Bucket' => $bucket,
                    'Key'    => $keyname,
                    'SaveAs' => $filepath
                ));
                // insert the recently saved file to the zip
                $zip->addFile($filepath, $saveas);
            }
        }