use_page_numbers in codeigniter pagination class? - codeigniter

Question

I have a problem with using use_page_numbers config set to true in my pagination class!
When I click on the link of page 2, the number of rows it retrieves from database is correct, but the problem is that:
the first row of page 2 is the third row of page one ! It means that page 2 starts with the same row from the database which has been retrieved in the first page in the third row. for example :
Page 1: 10, 11, 12, 13, 14
Page 2: 12, 13, 14, 15, 16
and of course the page 3 starts from the second row of page 2 :
Page 3: 13, 14, 15, 16, 17
This is the code I have :
function get_brands_list($options = array())
{
//Pagination config
$config['base_url'] = base_url() . 'admin/brands/page/';
$config['total_rows'] = $this->db->get('mg_brands')->num_rows();
$config['per_page'] = 5;
$config['num_links'] = 4;
$config['uri_segment'] = 4;
$config['use_page_numbers'] = TRUE;
$this->pagination->initialize($config);
$offset = $this->uri->segment(4, 0);
$this->db->order_by('brand_Sort', 'ASC');
$query = $this->db->get('mg_brands', $config['per_page'], $offset);
if(isset($options['brand_Id']) || isset($options['brand_Name']))
return $query->row(0);
return $query->result();
}

Answer 1

You have a problem in calculation of offset variable.... Try this one:
$page_num = $this->uri->segment(4, 0);
$offset = ($page_num - 1) * $config['per_page'];