Php AWS SDK S3删除存储桶不工作

试图删除一个上面有2个html文件的bucket，下面是代码

但是我犯了一个错误

致命错误：在中找不到类“ClearBucket”

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创建对象时尝试使用完整命名空间$clear=new Aws\S3\Model\ClearBucket（$client，$bucket）仍有一个错误致命错误：在sdk中未找到类“Aws\S3\Model\ClearBucket”，请检查类并应用正确的路径。

    require '../aws/aws-autoloader.php';
use Aws\S3\S3Client;

    $client = new S3Client(array(
        'credentials' => array(
            'key'    => $aws_access_key,
            'secret' => $aws_secret_key,
        ),
        'region'  => $aws_region,
        'version' => 'latest'

    ));


    $clear = new ClearBucket($client, $bucket);
    $clear->clear();


    // Delete the bucket
    $client->deleteBucket(array('Bucket' => $bucket));

    // Wait until the bucket is not accessible
    $client->waitUntil('BucketNotExists', array('Bucket' => $bucket));