The imap_delete function allows the option to use a UID for the message number but the imap_undelete function does not.
(PHP 4, PHP 5, PHP 7, PHP 8)
imap_undelete — Unmark the message which is marked deleted
$imap
, string $message_num
, int $flags
= 0
) : boolRemoves the deletion flag for a specified message, which is set by imap_delete() or imap_mail_move().
imap_stream
Um stream IMAP retornado por imap_open().
message_num
The message number
flags
Retorna true
em caso de sucesso ou false
em caso de falha.
The imap_delete function allows the option to use a UID for the message number but the imap_undelete function does not.