same as any Invite System, simple to have. you need a url that activate the permission to register... like register.php?invite=yes?referrerid=XX
so when people visit the register.php, instead of simply hitting the vboptions to activate registration, they activate it by this simple url.
SOOO SIMPLE!
EDIT: here is the code:
in register.php FIND:
PHP Code:
if (empty($_REQUEST['do']) AND empty($_REQUEST['a']))
just BEFORE, add:
PHP Code:
if($_REQUEST['invite'] == 'yes') $vboptions['allowregistration'] = 1;
now, you simply have to create an invite url like this:
Code:
register.php?invite=yes?referrerid=$bbuserinfo[userid]
that's all...
you can also join with this hack: Refer Friend from Erwin:
https://vborg.vbsupport.ru/showthread.php?t=59708 and simply change the URL in the message to the one i just gave here!