Codeigniter 2将控制器限制为命令行

I need to restrict a controller in CI 2 to only run from command line. The other controllers in the application are accessible from the web.

What's the best way to do it?

You might want to check if is a CLI request:

class Mycontroller extends CI_Controller {

   function __construct()
   {
     parent::__construct();

     if(!$this->input->is_cli_request())
     { 
       // echo 'Not allowed';
       // exit();
     }
   }

}