RandomStringTrait.php

<?php
/**
 * Copyright 2010 - 2017, Cake Development Corporation (https://www.cakedc.com)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright Copyright 2010 - 2017, Cake Development Corporation (https://www.cakedc.com)
 * @license MIT License (http://www.opensource.org/licenses/mit-license.php)
 */

namespace CakeDC\Users\Traits;

trait RandomStringTrait
{
    /**
     * Generates random string
     * @param int $length String size.
     * @return string
     */
    public function randomString($length = 10)
    {
        if (!is_numeric($length) || $length <= 0) {
            $length = 10;
        }
        $string = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

        return substr(str_shuffle($string), 0, $length);
    }
}