问Symfony2 -如何在控制器中验证电子邮件地址

EN

use Symfony\Component\Validator\Constraints\Email as EmailConstraint;
// ...

public function customAction()
{
    $email = 'value_to_validate';
    // ...

    $emailConstraint = new EmailConstraint();
    $emailConstraint->message = 'Your customized error message';

    $errors = $this->get('validator')->validateValue(
        $email,
        $emailConstraint 
    );

    // $errors is then empty if your email address is valid
    // it contains validation error message in case your email address is not valid
    // ...
}
// ...

/**
 * Validates a single email address (or an array of email addresses)
 *
 * @param array|string $emails
 *
 * @return array
 */
public function validateEmails($emails){

    $errors = array();
    $emails = is_array($emails) ? $emails : array($emails);

    $validator = $this->container->get('validator');

    $constraints = array(
        new \Symfony\Component\Validator\Constraints\Email(),
        new \Symfony\Component\Validator\Constraints\NotBlank()
    );

    foreach ($emails as $email) {

        $error = $validator->validateValue($email, $constraints);

        if (count($error) > 0) {
            $errors[] = $error;
        }
    }

    return $errors;
}

// add this above your class
use Symfony\Component\Validator\Constraints\Email;

public function saveAction(Request $request) 
{
    $form = $this->createFormBuilder()
        ->add('email', 'email')
        ->add('siteUrl', 'url')
        ->getForm();

    if ('POST' == $request->getMethod()) {
        $form->bindRequest($request);

        // the data is an *array* containing email and siteUrl
        $data = $form->getData();

        // do something with the data
        $email = $data['email'];

        $emailConstraint = new Email();
        $emailConstraint->message = 'Invalid email address';

        $errorList = $this->get('validator')->validateValue($email, $emailConstraint);
        if (count($errorList) == 0) {
            $data = array('success' => true);
        } else {
            $data = array('success' => false, 'error' => $errorList[0]->getMessage());
        }
   }

   return $this->render('AcmeDemoBundle:Default:update.html.twig', array(
       'form' => $form->createView()
   ));
}