(PHP 4, PHP 5, PHP 7)
imap_unsubscribe — Unsubscribe from a mailbox
$imap_stream
   , string $mailbox
   )
   Unsubscribe from the specified mailbox.
  
imap_streamAn IMAP stream returned by imap_open().
mailboxThe mailbox name, see imap_open() for more information
   Returns TRUE on success or FALSE on failure.