Community Auth Learning...

Okay I just modified the codes,

Code:

private function _get_unused_id()
    {
        // Create a random user id
        //$random_unique_int = mt_rand(1200, 4294967295);
    $random_unique_int = mt_rand();

        // Make sure the random user_id isn't already in use
        $query = $this->db->where('user_id', $random_unique_int)
            ->get_where(config_item('user_table'));

        if ($query->num_rows() > 0) {
            $query->free_result();

            // If the random user_id is already in use, get a new number
            return $this->_get_unused_id();
        }

        return $random_unique_int;
    }

It works now, but I'm not sure why brian did that.
Brian??? lol