Can CodeIgniter Helper Functions use database functions?

Question

One of my CodeIgniter Controller functions needs to call a recursive function as part of its functionality. The function call chokes if I put it inside the controller class, an

Answer 1

We can define a function in helper

if (!function_exists('getRecordOnId'))
{
    function getRecordOnId($table, $where){
        $CI =& get_instance();
        $CI->db->from($table);
        $CI->db->where($where);
        $query = $CI->db->get();
        return $query->row();
    }
}

and we can call from view like

$recordUser = getRecordOnId('users', ['id' => 5]); //here 5 is user Id which we can get from session or URL.