name : LanguageValidator.php <?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Validator\Constraints; use Symfony\Component\Intl\Intl; use Symfony\Component\Validator\Constraint; use Symfony\Component\Validator\ConstraintValidator; use Symfony\Component\Validator\Exception\UnexpectedTypeException; /** * Validates whether a value is a valid language code * * @author Bernhard Schussek <bschussek@gmail.com> * * @api */ class LanguageValidator extends ConstraintValidator { /** * {@inheritDoc} */ public function validate($value, Constraint $constraint) { if (null === $value || '' === $value) { return; } if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) { throw new UnexpectedTypeException($value, 'string'); } $value = (string) $value; $languages = Intl::getLanguageBundle()->getLanguageNames(); if (!isset($languages[$value])) { $this->context->addViolation($constraint->message, array('{{ value }}' => $value)); } } }