Question

In Codeigniter, there are library and helper.
I can access controller and its sub function.
for eample.

login/getid

Is there any way to access library or helper through url?

Update :
I made a captcha library in login controller.
I want to use it in many other controller’s view.
in view file, the captcha code should be like this,

<img src="/login/get_captcha" />

everytime I want to use captcha, I have to call login controller.

So, I thought that there should be better way to do this.
If library or helper can access through url, I can make this to helper.
can access another controller’s view without loading login’s controller.

Answer 1

You can create a wrapper controller to access those functions exclusively and use your routes to utilize said URL’s

Example: yoursite.com/helper/geo/citiesNearZip/90210

class helperController extends CI_Controller {

    public function __construct()
    {
        parent::__construct();
        $this->load->helper($this->uri->segment(1)); // geo helper in this example

        if($this->uri->segment(2))
        {
            $helper_method = $this->uri->segment(2);
        }
        else
        {
            show_404();
            return false;
        }

        // check if helper has function named after segment 2, function citiesNearZip($zip) in this example...
        if(function_exists($helper_method)
        {
            // Execute function with provided uri params, xss filter, secure, etc...
            // You would also want to grab all the remaining uri params and pass them as 
            // arguments to your helper function
            $helper_method();
        }
    }
}