Redirecting to last visited page after registration.
Imagine this scenario: A new user on your awesome webpage finds an awesome link, but it's only open to registered users, so he's automatically redirected to login form, then he goes to a register page (or fills embedded form right there) and then gets redirected back to a homepage. Somewhat frustrating experience, don't you think?
Well, let's solve this little problem with some help from [symfony2 authentication listener] (https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Security/Http/Firewall/AbstractAuthenticationListener.php). More specifically, by exploiting [already existing feature] (https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Security/Http/Firewall/AbstractAuthenticationListener.php#L270) for login form. This feature is actually a simple session parameter that is set the moment