递归删除Google Cloud Storage中的文件夹

我有以下代码，应该删除目录及其中的所有内容.

I have the following code that should delete the directory and everything inside it.

它似乎可以正常工作，但是由于某些原因，我在代码运行时在我的应用引擎日志中收到以下警告.

It seems to work fine but for some reason I get the following warnings in my app engine logs when the code runs.

有人知道为什么会发生这种情况，或者是否有更好的方法来避免这些错误?

Does anyone know why this would happen or if there is a better way to avoid these errors?

PHP警告:云存储错误:在第223行的/base/data/home/runtimes/php/sdk/google/appengine/ext/cloud_storage_streams/CloudStorageDirectoryClient.php中未找到

PHP Warning: Cloud Storage Error: NOT FOUND in /base/data/home/runtimes/php/sdk/google/appengine/ext/cloud_storage_streams/CloudStorageDirectoryClient.php on line 223

function deleteDir($dirPath) 
{
    if (! is_dir($dirPath)) {
        die("not a directory");
    }
    if (substr($dirPath, strlen($dirPath) - 1, 1) != '/') {
        $dirPath .= '/';
    }
    $files = glob($dirPath . '*', GLOB_MARK);
    foreach ($files as $file) {
        if (is_dir($file)) {
            deleteDir($file);
        } else {
            unlink($file);
        }
    }
    rmdir($dirPath);
}

deleteDir("gs://folder/folder");