This process ads new fields to joomla for users, like age, address etc.
after adding them to core, they can be shown and accessed normally through registration page or account details.
Ths have been tested on:
1. joomla 1.0
2. field added and then edited from account manager (not shown in registration)
1. Add to the database
Goto joomla database > jos_users > simply add new field in the table with any name (e.g: address)
2. goto > joomla directory > includes > joomla.php
search for this line:
class mosUser extends mosDBTable {
add this after that line:
/** @var our new variable*/
var $our-variable-name = null;
3. goto > joomla directory > com_user > user.php
look for:
$row->email
this will be found twice in 2 lines (total four times)
simply copy those two lines and paste below it with our variable name.
e.g:
$row->email = trim( $row->email );
$row->address = trim( $row->address );
4.goto > joomla directory > com_user > user.html.php
and add new input field according to the design.
5. and same to be done in admin.users.html.php
to show user data in admin panel