Symfony2 SecurityController error - php

Question

I'm new in symfony and I'm following the login form tutorial(https://symfony.com/doc/2.8/cookbook/security/form_login_setup.html) but I get the following error:
Uncaught PHP Exception LogicException: "The controller must return a response (null given). Did you forget to add a return statement somewhere in your controller?" at /var/www/html/app/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php line 157
Context: { "exception": "Object(LogicException)" }
I use the same SecurityController:
class SecurityController extends Controller{
* #Route("/admin", name="login")
public function loginAction(Request $request)
{
$authenticationUtils = $this->get('security.authentication_utils');
// get the login error if there is one
$error = $authenticationUtils->getLastAuthenticationError();
// last username entered by the user
$lastUsername = $authenticationUtils->getLastUsername();
return $this->render(
'security/login.html.twig',
array(
// last username entered by the user
'last_username' => $lastUsername,
'error' => $error,
)
);
}
/**
* #Route("/login_check", name="login_check")
*/
public function loginCheckAction()
{
// this controller will not be executed,
// as the route is handled by the Security system
}
security.yml
# To get started with security, check out the documentation:
http://symfony.com/doc/current/book/security.html
security:
# http://symfony.com/doc/current/book/security.html#where-do-users-come-from-user-providers
providers:
app_users:
ldap:
service: app.ldap
base_dn: DC=corp, DC=int
search_dn: null
search_password: null
filter: (uid={username})
default_roles: ROLE_USER
firewalls:
# disables authentication for assets and the profiler, adapt it according to your needs
dev:
pattern: ^/(_(profiler|wdt)|css|images|js)/
security: false
main:
anonymous: ~
# activate different ways to authenticate
# http_basic: ~
# http://symfony.com/doc/current/book/security.html#a-configuring-how-your-users-will-authenticate
# form_login: ~
# http://symfony.com/doc/current/cookbook/security/form_login_setup.html
secure:
provider: app_users
form_login_ldap:
service: app.ldap
dn_string: "uid={username},ou=Users,dc=corp,dc=int"
check_path: login_check
login_path: admin
logout: true

Answer 1

In your security.yml, try to replace
check_path: login_check
by
check_path: /login_check
And make your method like this :
/**
* #Route("/login_check", name="login_check")
*/
public function loginCheckAction()
{
throw new \RuntimeException('You must configure the check path to be handled by the firewall using form_login in your security firewall configuration.');
}