symfony/src/Symfony/Component/Validator/Constraints/Url.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\Validator\Constraint;

/** @Annotation */
class Url extends Constraint
{
    public $message = 'This value is not a valid URL';
    public $protocols = array('http', 'https');
}