Middleware / Filters in CodeIgniter

Middleware / Filters in CodeIgniter — a practical guide to CodeIgniter filters with clear examples you can reuse in real projects.

CodeIgniter Tutorial Series (55/74). Prefer one article? Read the complete CodeIgniter tutorial.

Short description

CI4 filters run before/after controllers. Register them in `app/Config/Filters.php`.

Auth filter sketch

public function before(RequestInterface $request, $arguments = null)
{
    if (! session()->get('user_id')) {
        return redirect()->to('/login');
    }
}