How to create Controllers in Symfony2?
Controller's file default location is src/AppBundle/Controller Now you can create here your controller with below code.
BY Best Interview Question ON 24 Jan 2019
Example
namespace AppBundle\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
class YourControllerName extends Controller
{
}