imap_uid

(PHP 3>= 3.0.3, PHP 4 )

imap_uid -- This function returns the UID for the given message sequence number

Description

int imap_uid ( resource imap_stream, int msgno)

This function returns the UID for the given message sequence number. An UID is an unique identifier that will not change over time while a message sequence number may change whenever the content of the mailbox changes. This function is the inverse of imap_msgno().

注: This is not supported by POP3 mailboxes.