Pagination not working on my application - CodeIgniter - php

Question

I have been able to develop a pagination for my page which contains about 25000 records. The page paginates in 100's but for now, when i click on the pagination link to move to the next page, it leads me to the first page again. But the URI on my browser shows the per page number like customers/100 . What could i be doing wrong below
Controller
$config['base_url'] = base_url() . 'customers/index/';
$config["total_rows"] = $customers
$config["per_page"] = 100;
$config['num_links'] = 10;
$config["uri_segment"] = 3;
$this->pagination->initialize($config);
$page = ($this->uri->segment(3)) ? $this->uri->segment(3) : 0;
$data['items'] = $this->customer->get_customer_all($config["per_page"]);
Model
public function get_customer_all($limit = null) {
$this->db->select('*');
$this->db->from('courses');
if($limit!=''){
$this->db->limit($limit);
}
$query = $this->db->get();
return ($query) ? $query->result() : false;
}

Answer 1

Why do you not use $page variable?
For getting data partially you need both limit and offset.
limit for count of customers per page and offset for understanding what page you are on.
So try to change you request to model like this:
$data['items'] = $this->customer->get_customer_all($config["per_page"], $page);
And update model like this (with some changes):
public function get_customer_all($limit = 0, $offset = 0) {
return $this->db->select('*')->
from('courses')->
limit($limit)->
offset($offset)->
get()->
result_array();
}