如何在Codeigniter中读取Controller中的任何方法之前检查条件？

Question

How to check a condition before reading all the methods in a controller. After the condition is checked, if it is TRUE, then only the methods in the controller have to be accessible. If the condition returns false then it should be redirected to another controller. How can I achieve this?

Thanks in Advance.

Answer 1

Controller automatically runs construct every time it is initialized, before it runs any other methods, so you can use it to set conditions required to access other controller methods.

Example:

class ExampleController extends CI_Controller {

   public function __construct () {

       // use construct method of CI_Controller(the parent)
       // don't foget this because it wont work without it!
       parent::__construct();


       if(true) {
           //do the thing you want
       } else {
          // use the url helper to redirect to another page/controller
          $this->load->helper('url');
          redirect('another-page');
       }

   }

   public function index() {
      //display index page...   
   }
}