如何使用PHP生成预先签名的S3来上传文件到S3存储桶中的文件夹？

<?php
require_once 'cos-autoloader.php'; // 加载腾讯云COS PHP SDK

use Qcloud\Cos\Client;

$secretId = 'your-secret-id'; // 替换为你的SecretId
$secretKey = 'your-secret-key'; // 替换为你的SecretKey
$region = 'your-bucket-region'; // 替换为存储桶的地域
$bucket = 'your-bucket-name'; // 替换为存储桶的名称
$filePath = 'path/to/upload/file'; // 替换为要上传的文件路径
$folderPath = 'path/to/destination/folder'; // 替换为目标文件夹的路径

// 创建S3客户端
$client = new Client([
    'region' => $region,
    'credentials' => [
        'secretId' => $secretId,
        'secretKey' => $secretKey,
    ],
]);

// 生成预先签名的S3请求
$command = $client->getCommand('PutObject', [
    'Bucket' => $bucket,
    'Key' => $folderPath . '/' . basename($filePath),
]);

$request = $client->createPresignedRequest($command, '+10 minutes');

// 获取预先签名的请求URL
$presignedUrl = (string)$request->getUri();

// 使用预先签名的请求URL上传文件
$response = $client->putObject([
    'Bucket' => $bucket,
    'Key' => $folderPath . '/' . basename($filePath),
    'SourceFile' => $filePath,
]);

// 打印上传结果
print_r($response);
?>