Codeigniter cache model sample

model

if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Countries_model extends CI_Model {

public function get_countries()
 {
  $query = $this->db->get('countries');

  if ($query->num_rows() > 0) {
   return $query->result();
  } else {
   return FALSE;
  }
  
 }

public function get_cache()
 {
  if ( ! $countries = $this->cache->get('countries')) {
   $countries = $this->get_countries();
   $this->cache->save('countries', $countries, 86400);
  }

  return $countries;
 }
}

controller

$this->countries_model->get_cache();