How to sort data in reverse order in a query?

Question

MySQL

I extract the last 3 comments by query. Question - how now these 3 comments are sorted in reverse order?

$this->db->order_by('id DESC');
                $limit = 300;
                $offset = 3;
                $query = $this->db->get_where('comments', array('id' => id), $limit, $offset);
                return $query->result_array();

Answer 1

array_reverse($array, true);
It won't work?
ps: php.net/manual/en/array.sorting.php

Answer 2

$this->db->order_by('id ASC');