SELECT u.id as editid, u.*, c.* , e.* from #__users as u, #__user_extended_config as c";
$sql .= " LEFT JOIN #__user_extended AS e ON u.id = e.id";
$sql .= " WHERE u.id = '$uid'";
$sql .= " AND c.id = '1'";
تو اينجا u.idرو اشكال ميگيره