问Symfony -限制特定域的注册

EN

namespace AppBundle\Validator\Constraints;

use Symfony\Component\Validator\Constraint;

/**
 * @Annotation
 */
class EmailDomain extends Constraint
{
    public $domains;
    public $message = 'The email "%email%" has not a valid domain.';
}

namespace AppBundle\Validator\Constraints;

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;

class EmailDomainValidator extends ConstraintValidator
{
    public function validate($value, Constraint $constraint)
    {
        $explodedEmail = explode('@', $value);
        $domain = array_pop($explodedEmail);

        if (!in_array($domain, $constraint->domains)) {
            $this->context->buildViolation($constraint->message)
                 ->setParameter('%email%', $value)
                 ->addViolation();
        }
    }
}

use Symfony\Component\Validator\Constraints as Assert;
use AppBundle\Validator\Constraints as CustomAssert;

class MyEntity
{
    /**
     * @Assert\Email()
     * @CustomAssert\EmailDomain(domains = {"yahoo.com", "gmail.com"})
     */
    protected $email;

    - AppBundle\Validator\Constraints\EmailDomain:
        domains:
            - yahoo.com