问Google云存储代码不起作用

EN

require 'vendor/autoload.php';

use Google\Cloud\Storage\StorageClient;
use Google\Cloud\Core\Exception\GoogleException;

if (isset($_FILES) && $_FILES['file']['error']== 0) {
$allowed = array ('png', 'jpg', 'gif', 'jpeg');
$ext = pathinfo($_FILES['file']['name'], PATHINFO_EXTENSION);
if (!in_array(strtolower ($ext), $allowed)) {
echo 'The file is not an image.';
die;
}

$projectId = 'photo-upload-205311';

$storage = new StorageClient ([
'projectId' => $projectId,
'keyFilePath' => 'Photo Upload-3af18f61531c.json'
]);

$bucketName = 'photo-upload-205311.appspot.com';
$bucket = $storage->bucket($bucketName);

$uploader = $bucket-> getResumableUploader (
fopen ($_FILES['file']['tmp_name'], 'r'),[
'name' => 'images/load_image.png',
'predefinedAcl' => 'publicRead',
]);

try {
$uploader-> upload ();
echo 'File Uploaded';
} catch (GoogleException $ex) {
$resumeUri = $uploader->getResumeUri();
$object = $uploader->resume($resumeUri);
echo 'No File Uploaded';
}
}
else {
echo 'No File Uploaded';
}

> Warning: The use statement with non-compound name
> 'GoogleCloudStorageStorageClient' has no effect in upload_gcs.php on
> line 4
> 
> Fatal error: Class 'StorageClient' not found in upload_gcs.php on line
> 16