phpOMS/Utils/RnG/StringUtils.php

<?php
/**
 * Orange Management
 *
 * PHP Version 7.1
 *
 * @package    TBD
 * @copyright  Dennis Eichhorn
 * @license    OMS License 1.0
 * @version    1.0.0
 * @link       http://website.orange-management.de
 */
declare(strict_types = 1);

namespace phpOMS\Utils\RnG;

/**
 * String generator.
 *
 * @package    Framework
 * @license    OMS License 1.0
 * @link       http://website.orange-management.de
 * @since      1.0.0
 */
class StringUtils
{

    /**
     * Get a random string.
     *
     * @param int    $min     Min. length
     * @param int    $max     Max. length
     * @param string $charset Allowed characters
     *
     * @return string
     *
     * @since  1.0.0
     */
    public static function generateString(int $min = 10, int $max = 10, 
        string $charset = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
    ) : string
    {
        $length           = mt_rand($min, $max);
        $charactersLength = strlen($charset);
        $randomString     = '';

        for ($i = 0; $i < $length; ++$i) {
            $randomString .= $charset[mt_rand(0, $charactersLength - 1)];
        }

        return $randomString;
    }
}