SF2

Form Validation Errors For Entity

// get a ConstraintViolationList
$errors = $this->get('validator')->validate( $user );

GET and POST in Controller

// $_GET parameters
$request->query->get('name');

// $_POST parameters
$request->request->get('name');

RedirectResponseWithCookie

use Symfony\Component\HttpFoundation\Cookie;
use Symfony\Component\HttpFoundation\RedirectResponse;
 
/**
 * RedirectResponseWithCookie represents an HTTP response doing a redirect and sending cookies.
 */
class RedirectResponseWithCookie extends RedirectResponse
{
 
   /**
    * Creates a redirect response so that it conforms to the rules defined for a redirect status code.
    *
    * @param string  $url    The URL to redirect to
    * @param integer $status The status code (302 by default)
    * @param Symfony\Component\HttpFoundation\Cookie[] $cookies An array of Cookie objects
    */
   public function __construct($url, $status = 302, $cookies = array ())
   {
      parent::__construct($url, $status);
 
      foreach ($cookies as $cookie)
      {
         if (!$cookie instanceof Cookie)
         {
            throw new \InvalidArgumentException(sprintf('Third parameter is not a valid Cookie object.'));
         }
         $this->headers->setCookie($cookie);
      }
   }
}