This stream is required to be opened as the mail admin user for the get_quota function to work. quota_root should normally be in the form of user.name where name is the mailbox you wish to retrieve information about.
imap_stream should be the value returned from an imap_open() call. NOTE: This stream is required to be opened as the mail admin user for the get_quota function to work. quota_root should normally be in the form of user.name where name is the mailbox you wish to retrieve information about.