function insertFile($service, $title, $description, $parentId, $mimeType, $filename) {

  $file = new Google_Service_Drive_DriveFile();

  $file->setTitle($title);

  $file->setDescription($description);

  $file->setMimeType($mimeType);

  // Set the parent folder.

  if ($parentId != null) {

    $parent = new Google_Service_Drive_ParentReference();

    $parent->setId($parentId);

    $file->setParents(array($parent));

  }

  try {

    $data = file_get_contents($filename);

    $createdFile = $service->files->insert($file, array(

      'data' => $data,

      'mimeType' => $mimeType,

  'uploadType' => 'multipart',

    ));

    // Uncomment the following line to print the File ID

    // print 'File ID: %s' % $createdFile->getId();

    return $createdFile;

  } catch (Exception $e) {

    print "An error occurred: " . $e->getMessage();

  }

}

/*  폴더 만들기 참고

File body = new File();

body.setTitle("title");

body.setMimeType("application/vnd.google-apps.folder");

File file = service.files().insert(body).execute();

*/