Custom Profile Field Check

[zylstra]

I'm trying to check for a custom profile field value, and change it if it is too high. So at the profile_updateprofile hook I have placed the following, none of which work. Could you tell me the code to get it to work? Thanks.

PHP Code:

if ($vbulletin->GPC['field15'] > 10)
{
//    $userdata->set_userfields(array(
//        'field15'    => 9));
//    $userdata->set('field15', 9);
//    $vbulletin->userinfo['field15'] = 9;
}