Adding an AJAX powered login form to a Symfony 2 project is pretty simple, but there are a few things to cover. The first is that the Symfony firewall handles authentication by sending a form to the route defined in the app/config/security.yml as the check_path for the firewall. So to login using AJAX, a form needs to be posted to that route along with a few fields, _username, _password, _remember_me, and if you’ve enabled CSRF for your form, the _csrf_token, field. more…