Marking an email unread in PHP IMAP

Question

Are there any PHP IMAP functions which can be used to mark an email as unread? I am checking the mail using some IMAP functions that return the messages as read, but I want to make them unread.

Answer 1

To mark an email message as unread, you should unset the \\Seen flag on that message.
You could use the imap_clearflag_full function to clear message flags.

// Unset desired flag
imap_clearflag_full($imap_connection, $message_number, "\\Seen");
// Confirm changes
imap_close($imap_connection, CL_EXPUNGE);

Note:

"I am checking the mail using some IMAP functions that return the messages as read"

You can set the FT_PEEK flag when reading messages, this will not set the \\Seen flag if not already set.

// This will not mark a message as seen
$body = imap_body($imap_stream, $msg_number, FT_PEEK); 

Answer 2

try the imap_clearflag_full ,

imap_clearflag_full($mailbox, $email_number, "\\Seen");

Answer 3

try the imap_setflag_full, http://www.php.net/manual/en/function.imap-setflag-full.php