See also this somewhat similar add-on:
https://vborg.vbsupport.ru/showthread.php?t=82993

Had I known of its existence I probably wouldn't have created this one.

makaiguy, Your hack worked perfect for me, we are using your code with a single choice menu to pick a home state, we run a jeep wrangler forum, and are using your hack to allow us to do local and regional forums based upon this choice.. regardless of another hack being out there. Thanks a Ton, Don

Just updated my test board to vB 3.6.7-PL1. Original code from 3.5.4 continues to work as desired.

If you've installed this plugin, please don't forget to click the Installed link in the first post.

Please help me urgently, i added your details in and now i can't access my forum AT ALL. How can i turn it off? I can't access my admin panel or anything. Please help.

I went to vB AdminCP, go to Plugin System > Add New Plugin.

Under Hook Location, scroll down to select 'global_start'.

In the 'Plugin PHP Code' field, copy/paste your edited control
script from Part I.

// Place user in/out of single usergroup
// according to yes/no selection made in profile, via
// custom radio button field. ver 1.04

// Enter values in the strings below for your forum
// custom field containing your radio button
$radio_field = 'field10';
// Text returned for 'yes' choice
$join = 'Female';
// Usergroup to enter/exit
$ug = '33';
// You don't need to enter anything below here.

// Derive additional needed variables
// userid of user
$userid = ($vbulletin->userinfo['userid']);
// current usergroups as array
$ugarr = explode(',' , (''.$vbulletin->userinfo['membergroupids']));
// current radio button setting
$fieldval = $vbulletin->userinfo[$radio_field];

// Do the work
// Proceed only if there is a user choice
if ($fieldval != '')
{
// If yes, add to usergroups
if ($fieldval == $join)
{
$ugarr = IntoGroup($ugarr, $ug, $userid);
}
// Else no, remove from usergroups
else
{
$ugarr = OutOfGroup($ugarr, $ug, $userid);
}
}
// End of Control Code


// Define functions used in plug-in
// ***************** Function IntoGroup() **************

Function IntoGroup($ugarr, $ugnum, $usrid)
{
global $vbulletin;
// only proceed if not trying to put into current primary usergroup
if ($ugnum != $vbulletin->userinfo['usergroupid'])
{
// check for empty usergroup array
if($ugarr[0] == '')
{
// set veriables
$uglist = $ugnum;
$ugarr[0] = $ugnum;
$doit = true;
}
// usergroup array not empty
else
{
// If not in usergroup already
if(!in_array($ugnum, $ugarr))
{
$doit = true;
// add group to end of array
array_push($ugarr, $ugnum);
// sort numerically
sort($ugarr, SORT_NUMERIC);
// if only one group in array
if (count($ugarr) == 1)
{
// simple group list string with no commas
$uglist = $ugnum;
}
// else more groups in array than one
else
{
// group list string with comma delimiters
$uglist = implode(',' , $ugarr); // convert array to string
}
}
}
if ($doit)
{
// Put updated usergroup list into database
$updatefields = $vbulletin->db->query("
UPDATE user
SET membergroupids='$uglist'
WHERE userid=$usrid
");
}
}
return $ugarr;
}

// ***************** Function OutOfGroup() **************
Function OutOfGroup($ugarr, $ugnum, $usrid)
{
global $vbulletin;
// only proceed if not trying to remove from current primary usergroup
if ($ugnum != $vbulletin->userinfo['usergroupid'])
{
// Proceed only if usergroup array not empty
if($ugarr[0] != '')
{
// Check for target usergroup in existing array
if(in_array($ugnum, $ugarr))
{
// Rebuild array without target usergroup
$iii = 0;
foreach ($ugarr as $value)
{
if ($value != $ugnum)
{
$new_gparr[$iii] = $value;
$iii++;
}
}
$ugarr = $new_gparr;
if (count($ugarr) == 0)
{
$uglist = '';
}
else
{
$uglist = implode(',' , $new_gparr);
}
// Put updated usergroup list into database
$updatefields = $vbulletin->db->query("
UPDATE user
SET membergroupids='$uglist'
WHERE userid=$usrid
");
}
}
}
return $ugarr;
}
// End of function code

Mum - nobody else has reported anything like this.

See this post for information on how to completely disable the hook system so that no plugins will run. If your ONLY problem is with a plugin installation, this should allow you to access your AdminCP:
http://www.vbulletin.com/forum/showthread.php?t=196688

This mod is excellent and works a charm. I've added it to my clan website.

I've set it to appear in the "edit profile" as 2 radio buttons however.... what I would really like is a custom page showing two images/buttons. When clicking on one it will add you to that usergroup.

Is that possible?

THANKS

D

Not possible as written, but you could create a php page and adapt the code, I suppose. Would be an interesting project for somebody. You could use the two subroutines from this mod to move people into and out of the usergroups, but you'd have to write your own code to handle the choice made by the user.

Here's a tutorial on creating vB-based php pages:
https://vborg.vbsupport.ru/showthread.php?t=62164

We're in the middle of finally updating vB from 3.6.4 to 3.8.7-PL3 (long, long overdue). Although I'm having some difficulty getting some of my other tweaks to work, I'm pleased to announce that this mod continues to perform as written.