respect-validation/library/Rules/Call.php

<?php

/*
 * This file is part of Respect/Validation.
 *
 * (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
 *
 * For the full copyright and license information, please view the "LICENSE.md"
 * file that was distributed with this source code.
 */

declare(strict_types=1);

namespace Respect\Validation\Rules;

class Call extends AbstractRelated
{
    public function getReferenceValue($input)
    {
        return call_user_func_array($this->reference, [&$input]);
    }

    public function hasReference($input): bool
    {
        return is_callable($this->reference);
    }
}