MtRandGenerator.php

<?php
/**
 * This file is part of the ramsey/uuid library
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
 * @license http://opensource.org/licenses/MIT MIT
 * @link https://benramsey.com/projects/ramsey-uuid/ Documentation
 * @link https://packagist.org/packages/ramsey/uuid Packagist
 * @link https://github.com/ramsey/uuid GitHub
 */

namespace Ramsey\Uuid\Generator;

/**
 * MtRandRandomGenerator provides functionality to generate strings of random
 * binary data using the `mt_rand()` PHP function
 *
 * @link http://php.net/mt_rand
 */
class MtRandGenerator implements RandomGeneratorInterface
{
    /**
     * Generates a string of random binary data of the specified length
     *
     * @param integer $length The number of bytes of random binary data to generate
     * @return string A binary string
     */
    public function generate($length)
    {
        $bytes = '';

        for ($i = 1; $i <= $length; $i++) {
            $bytes = chr(mt_rand(0, 255)) . $bytes;
        }

        return $bytes;
    }
}