没关系，我自己发现了它 似乎您需要实例化父参考服务并将其传递给DriveFIle的parent方法.

never mind i found it myself it seems that you need to instantiate a parent reference service and pass it to the parents method of your DriveFIle

$parent = new Google_Service_Drive_ParentReference(); 
$parent->setId('folderid');
$file->setParents(array($parent));