Object Storage Service:Descargar un objeto a un archivo local (SDK de PHP V1)

<?php
if (is_file(__DIR__ . '/../autoload.php')) {
    require_once __DIR__ . '/../autoload.php';
}
if (is_file(__DIR__ . '/../vendor/autoload.php')) {
    require_once __DIR__ . '/../vendor/autoload.php';
}
use OSS\Credentials\EnvironmentVariableCredentialsProvider;
use OSS\OssClient;

// Obtain access credentials from environment variables. Before you run this sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set.
$provider = new EnvironmentVariableCredentialsProvider();
// Specify the Endpoint for the region where the bucket is located. For example, for the China (Hangzhou) region, set the Endpoint to https://oss-cn-hangzhou.aliyuncs.com.
$endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
// Specify the bucket name. Example: examplebucket.
$bucket= "examplebucket";
// Specify the full path of the object. Do not include the bucket name. Example: testfolder/exampleobject.txt.
$object = "testfolder/exampleobject.txt";
// Download the object to a local file named examplefile.txt and save it to the specified local path (D:\\localpath). If the local file exists, it is overwritten. If it does not exist, it is created.
// If you do not specify a local path, the downloaded file is saved to the local path of the project where the sample program resides.
$localfile = "D:\\localpath\\examplefile.txt";
$options = array(
        OssClient::OSS_FILE_DOWNLOAD => $localfile
    );

// Use a try-catch block to catch exceptions. If an exception is caught, the download failed. If no exception is caught, the download is successful.
try{
    $config = array(
        "provider" => $provider,
        "endpoint" => $endpoint,
        "signatureVersion" => OssClient::OSS_SIGNATURE_VERSION_V4,
        "region"=> "cn-hangzhou"
    );
    $ossClient = new OssClient($config);

    $ossClient->getObject($bucket, $object, $options);
} catch(OssException $e) {
    printf(__FUNCTION__ . ": FAILED\n");
    printf($e->getMessage() . "\n");
    return;
}
print(__FUNCTION__ . ": OK, please check localfile: 'examplefile.txt'" . "\n");