PHP and MySQL Web Development 4th Ed-tqw-_darksiderg

684 Chapter 29 Building a Web-Based Email Service
As you can see, this function uses mail() to send the email. First, however, it loads the
user’s email address out of the database to use in the From field of the email.
Replying To or Forwarding Mail
The Reply, Reply All, and Forward functions all send mail in the same way that New
Message does.The difference in how they work is that they fill in parts of the new message
form before showing it to the user. Look back at Figure 29.8.The content of the
message being replied to has been indented with the > symbol, and the Subject line prefaced
with Re:. Similarly, the Forward and Reply All options fill in the recipients, subject
line, and indented message.
The code to reply to or forward mail is activated in the body section of index.php,
as follows:
case 'reply-all':
//set cc as old cc line
if(!$imap) {
$imap = open_mailbox($_SESSION['auth_user'],
$_SESSION['selected_account']);
}
if($imap) {
$header = imap_header($imap, $messageid);
if($header->reply_toaddress) {
$to = $header->reply_toaddress;
} else {
$to = $header->fromaddress;
}
$cc = $header->ccaddress;
$subject = "Re: ".$header->subject;
$body = add_quoting(stripslashes(imap_body($imap, $messageid)));
imap_close($imap);
}
display_new_message_form($_SESSION['auth_user'],
$to, $cc, $subject, $body);
break;
case 'reply':
//set to address as reply-to or from of the current message
if(!$imap) {