(PHP 4, PHP 5, PHP 7)
imap_clearflag_full — Clears flags on messages
$imap_stream
   , string $sequence
   , string $flag
   [, int $options = 0
  ] )
   This function causes a store to delete the specified
   flag to the flags set for the
   messages in the specified sequence.
  
imap_stream由 imap_open() 返回的 IMAP 流。
sequenceA sequence of message numbers. You can enumerate desired messages with the X,Y syntax, or retrieve all messages within an interval with the X:Y syntax
flagThe flags which you can unset are "\\Seen", "\\Answered", "\\Flagged", "\\Deleted", and "\\Draft" (as defined by » RFC2060)
options
       options are a bit mask and may contain
       the single option:
       
ST_UID - The sequence argument contains UIDs
          instead of sequence numbers
         
        
   成功时返回 TRUE, 或者在失败时返回 FALSE。