Php/docs/function.imap-msgno
From Get docs
imap_msgno
(PHP 4, PHP 5, PHP 7)
imap_msgno — Gets the message sequence number for the given UID
Description
imap_msgno
( resource $imap_stream
, int $uid
) : int
Returns the message sequence number for the given
uid
.
This function is the inverse of imap_uid().
Return Values
Returns the message sequence number for the given
uid
.