Example of validating a scalar value in Symfony2

DefaultController.php

<?php
// .. other things

use Symfony\Component\Validator\Constraints\Email;

class DefaultController
{

    public function someAction()
    {
        $emails = // ... some way to get an email array
    
        $validator = $this->get('validator');
        $constraint = new Email();
        
        $goodEmails = array();
        $badEmails = array();
        foreach ($emails as $email) {
            $errors = $validator->validateValue($email, $constraint);
            if (count($errors) == 0) {
                $goodEmails[] = $email;
            } else {
                $badEmails[] = $email;
            }
        }
}