register.php form field into another custom field?

[johnmont]

I'd like to take a field from the registration form and in addition to the original field, put it into custom field when the user is created. This allows someone to enter a value one time and have it entered two places. Basically, I want them to be able to change the first instance in their profile, but not the second instance.

So on the signup form, I have:

field entry: $userfield14

In the database I want to enter $myfield into both userprofile 'field14' and userprofile 'field21'.

My hook location in register.php will be register_addmember_process. I could figure out how to do it if I modified the code in register.php before this point, but I'd like to use the plugins for obvious reason.

I tried

$userdata->set('field21', $vbulletin->GPC['field14']);

how do I get at this data?

but this doesn't seem to work. I'm a bit confused here, obviously. :-)

[Eakbok]

I Have the same error.

I tried getting the value of field5, sended by register form, but I can't capture it's value.

PHP Code:

        $un_ro_get=$vbulletin->GPC['userfield[field5]'];