respect-validation/library/Rules/Phone.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;

use function is_scalar;
use function preg_match;
use function sprintf;

class Phone extends AbstractRule
{
    protected function getPregFormat()
    {
        return sprintf(
            '/^\+?(%1$s)? ?(?(?=\()(\(%2$s\) ?%3$s)|([. -]?(%2$s[. -]*)?%3$s))$/',
            '\d{0,3}',
            '\d{1,3}',
            '((\d{3,5})[. -]?(\d{4})|(\d{2}[. -]?){4})'
        );
    }

    public function validate($input): bool
    {
        if (!is_scalar($input)) {
            return false;
        }

        return preg_match($this->getPregFormat(), (string) $input) > 0;
    }
}