CodeIgniter路由已匹配却返回404错误求助

Hey there, let's break down why you're hitting that 404 even though the route seems to match. The key issue here is a missing controller method—CodeIgniter doesn't map routes directly to view files; it routes to controller methods that then load the views.

The Root Cause #

Your route users/welcome is pointing to the Users controller's welcome() method, but from the code you shared, your Users controller only has a login() method. Without that welcome() method, CodeIgniter can't find what to execute, hence the 404 error—even though the view file exists.

Fix Steps #

1. Add the welcome() method to your Users controller
   Open your Users.php controller and add this method (you can add login validation to block direct access too):

   public function welcome() {
       // Optional: Prevent unlogged users from accessing this page
       if (!$this->session->userdata('logged_in')) {
           $this->session->set_flashdata('access_denied', 'Please log in first');
           redirect('users/login');
       }
   
       // Load your welcome view (matches your existing view file structure)
       $this->load->view('templates/header');
       $this->load->view('users/welcome');
       $this->load->view('templates/footer');
   }
   

2. Simplify Your Route Configuration (Optional)
   You don't need to define a route for every single controller method. Replace your individual users/xxx routes with one catch-all route to keep things clean:

   // Replace all your users-specific routes with this
   $route['users/(:any)'] = 'users/$1';
   $route['users'] = 'users'; // For the index method
   

   This will automatically map users/welcome to Users::welcome(), users/failed to Users::failed(), etc.

3. Verify the failed() Method Exists Too
   Don't forget to add a failed() method in your Users controller as well, since you're redirecting there on login failure. It should follow the same structure as the welcome method, loading the users/failed view.

Quick Check #

After adding the method, try accessing http://mysite/users/welcome directly—this should load the page without a 404 now. The redirect from your login method will then work as expected.

内容的提问来源于stack exchange，提问作者Tim C