guochanhua/server/application/common.php

<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2016 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 流年 <liu21st@gmail.com>
// +----------------------------------------------------------------------

// 应用公共文件


if (!function_exists('getNewRand'))
{
    /**
     * 获取字母数字随机数
     * @param int $len
     * @return string
     * @author matielong
     */
    function getNewRand($len = 4)
    {
        $chars_array = array(
            "0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
            "A", "B", "C", "D", "E", "F", "G",
            "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R",
            "S", "T", "U", "V", "W", "X", "Y", "Z",
        );
        $charsLen = count($chars_array) - 1;
        $outputstr = "";
        for ($i=0; $i<$len; $i++)
        {
            $outputstr .= $chars_array[mt_rand(0, $charsLen)];
        }
        return $outputstr;
    }
}