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;
use Symfony\Component\Validator\Exception\InvalidArgumentException;

/**
 * @Annotation
 * @Target({"PROPERTY", "METHOD", "ANNOTATION"})
 *
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
class Url extends Constraint
{
    const INVALID_URL_ERROR = '57c2f299-1154-4870-89bb-ef3b1f5ad229';

    protected static $errorNames = [
        self::INVALID_URL_ERROR => 'INVALID_URL_ERROR',
    ];

    public $message = 'This value is not a valid URL.';
    public $protocols = ['http', 'https'];
    public $relativeProtocol = false;
    public $normalizer;

    public function __construct($options = null)
    {
        parent::__construct($options);

        if (null !== $this->normalizer && !\is_callable($this->normalizer)) {
            throw new InvalidArgumentException(sprintf('The "normalizer" option must be a valid callable ("%s" given).', get_debug_type($this->normalizer)));
        }
    }
}