string
imap_clearflag_full
(int stream, string sequence, string flag, string options)
This function causes a store to delete the specified flag to the flags set for the messages in the specified sequence. The flags which you can unset are "\\Seen", "\\Answered", "\\Flagged", "\\Deleted", "\\Draft", and "\\Recent" (as defined by RFC2060).
The options are a bit mask with one or more of the following:
ST_UID The sequence argument contains UIDs instead of
sequence numbers