(PHP 4, PHP 5, PHP 7)
imap_undelete — Unmark the message which is marked deleted
$imap_stream
, int $msg_number
[, int $flags
= 0
] )Removes the deletion flag for a specified message, which is set by imap_delete() or imap_mail_move().
成功时返回 TRUE
, 或者在失败时返回 FALSE
。