使用Google Drive API（PHP）列出文件时出错(Error listing files with Google Drive API (PHP))

 我正在尝试使用Google的PHP API列出Google云端硬盘中的文件（ https://developers.google.com/drive/v2/web/quickstart/php ）。 
 
 我已设法获取范围访问令牌，但Google提供的列表文件示例代码（ https://developers.google.com/drive/v2/reference/files/list#response ）返回错误。 
 
 这是我的代码： 
 
$client = new Google_Client();
    $client->setAuthConfigFile('/usr/share/nginx/google.json');
    $client->setAccessToken($a4e->user->google_token); // access token scoped for DRIVE_READONLY
    $drive_service = new Google_Service_Drive($client);

    $files=retrieveAllFiles($drive_service);
    var_dump($files);

    function retrieveAllFiles($service) {
      $result = array();
      $pageToken = NULL;

      do {
        try {
          $parameters = array();
          if ($pageToken) {
            $parameters['pageToken'] = $pageToken;
          }
          $files = $service->files->listFiles($parameters);

          $result = array_merge($result, $files->getItems());
          $pageToken = $files->getNextPageToken();
        } catch (Exception $e) {
          print "An error occurred: " . $e->getMessage();
          $pageToken = NULL;
        }
      } while ($pageToken);
      return $result;
    }
 
 这将返回以下错误： 
 
 
 
 致命错误：在第30行的/usr/share/nginx/html/tools/google/index.php中调用未定义的方法Google_Service_Drive_FileList :: getItems（） 
 
 
 有谁知道我做错了什么？ 
 
 提前谢谢了。 

I'm trying to list files in Google Drive using Google's PHP API (https://developers.google.com/drive/v2/web/quickstart/php).
 
I've managed to obtain a scoped access token, but the sample code Google provides for listing files (https://developers.google.com/drive/v2/reference/files/list#response) is returning an error.
 
Here is my code:
 
$client = new Google_Client();
    $client->setAuthConfigFile('/usr/share/nginx/google.json');
    $client->setAccessToken($a4e->user->google_token); // access token scoped for DRIVE_READONLY
    $drive_service = new Google_Service_Drive($client);

    $files=retrieveAllFiles($drive_service);
    var_dump($files);

    function retrieveAllFiles($service) {
      $result = array();
      $pageToken = NULL;

      do {
        try {
          $parameters = array();
          if ($pageToken) {
            $parameters['pageToken'] = $pageToken;
          }
          $files = $service->files->listFiles($parameters);

          $result = array_merge($result, $files->getItems());
          $pageToken = $files->getNextPageToken();
        } catch (Exception $e) {
          print "An error occurred: " . $e->getMessage();
          $pageToken = NULL;
        }
      } while ($pageToken);
      return $result;
    }
 
This returns the following error:
 
 
 
Fatal error: Call to undefined method Google_Service_Drive_FileList::getItems() in /usr/share/nginx/html/tools/google/index.php on line 30
 
 
Does anyone know what I'm doing wrong?
 
Many thanks in advance.

原文：https://stackoverflow.com/questions/37986267