Originally Posted by therczone

I think this is a great hack. I customized it to include an AIM form for users to AIM friends with the referral link AND e-mail them. If anyone is interested in the code, just PM me.

If someone is not logged in, it will show up as "Unregistered" and referrerid=0. And if they do not have to be logged in, any abuse of the system could go untraceable. If the user is forced to login, and then abuses the system by spamming people, it would at least (unless they edit it out, but not everyone is that smart) have the referrerid link so you could know who it was who abused it in the event that someone complained about it and could send you the e-mail they received.

I spent a good amount of time pulling my hair out searching through calendar.php, private.php, etc. and here on vBulletin.org for a solution, and finally found it. Below, in green, is the code needed to be added to require users to login to see the refer page.

I don't take any credit for this, other than finding and informing everyone of the code. Here is the author's thread.

https://vborg.vbsupport.ru/showthread.php?t=59859

In sendmessage.php

// Erwin's Refer Hack
if (!$_REQUEST['refer'])
{
if (!($forumperms & CANVIEW) OR !($forumperms & CANEMAIL) OR (($threadinfo['postuserid'] != $bbuserinfo['userid']) AND !($forumperms & CANVIEWOTHERS)))
{
print_no_permission();
}
}
if ($bbuserinfo['userid'] == 0)
{
print_no_permission();
}
// Erwin's Refer Hack

I know print_no_permission(); is already in there, but I couldn't get it to work by inserting it with OR or AND into:

if (!($forumperms & CANVIEW) OR !($forumperms & CANEMAIL) OR (($threadinfo['postuserid'] != $bbuserinfo['userid']) AND !($forumperms & CANVIEWOTHERS)))

If anyone has a cleaner or better way, I'm all ears.

Originally Posted by auz1111

why not just wrap this around the link:

<if condition="$bbuserinfo['userid']"> Refer Link Here </if>