(PHP 4, PHP 5, PHP 7)
imap_close — Close an IMAP stream
$imap_stream
[, int $flag = 0
] ) : boolCloses the imap stream.
imap_stream由 imap_open() 返回的 IMAP 流。
flag
If set to CL_EXPUNGE, the function will silently
expunge the mailbox before closing, removing all messages marked for
deletion. You can achieve the same thing by using
imap_expunge()
成功时返回 TRUE， 或者在失败时返回 FALSE。