Codeigniter routing how to permit null parameter - codeigniter-routing

Question

I want paginate my index http:localhost/mysite/home but if I write only this http:localhost/mysite/home the page said: "page not found", but if I write http:localhost/mysite/home/3 its work! how to I can configure my routing to get null parameters? I tried with (:any) and (num) but not work
My route file is:
$route['404_override'] = 'welcome/no_found';
$route['home/'] = "welcome/home/$1";
My controller:
$config['base_url'] = base_url().'/mysite/home';
$config['total_rows'] = $this->mtestmodel->countNews();
$config['per_page'] = 2;
$config['num_links'] = 20;
$this->pagination->initialize($config);
$data['paginator']=$this->pagination->create_links();
$data['news']=$this->mtestmodel->show_news( $config['per_page'],intval($to) );
//$to is a parameter in url base_url()/mysite/home/3

Answer 1

Change your route.php file to the following:
$route['404_override'] = 'welcome/no_found';
$route['home/(:num)'] = "welcome/home/$1";
$route['home'] = "welcome/home";
This way, your application will catch both requests (http://localhost/mysite/home and http://localhost/mysite/home/3), and will send them both to your controller.
You should then be able to access your $to variable (which has been passed as the first argument into your controller's function) or use $this->uri->segment(2) instead.
e.g.
public function home($to = 0) {
$config['base_url'] = base_url().'/mysite/home';
$config['total_rows'] = $this->mtestmodel->countNews();
$config['per_page'] = 2;
$config['num_links'] = 20;
$this->pagination->initialize($config);
$data['paginator'] = $this->pagination->create_links();
$data['news'] = $this->mtestmodel->show_news( $config['per_page'],intval($to) );
}
Hope that helps!