<?php
namespace lib;

use think\Controller;


class Haxi extends Controller{
    //加密函数(参数:数组，返回值:字符串)
    public static $key_t = "sjiofssdsfd";//设置加密种子
    public static function encrypt($cookie_array){
        $txt = serialize($cookie_array);
        srand();//生成随机数
        $encrypt_key = md5(rand(0,10000));//从0到10000取一个随机数
        $ctr = 0;
        $tmp = '';
        for($i = 0;$i < strlen($txt);$i++){
            $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
            $tmp .= $encrypt_key[$ctr].($txt[$i] ^ $encrypt_key[$ctr++]);
        }
        return base64_encode(Haxi::key($tmp,Haxi::$key_t));
    }
     
    //解密函数(参数:字符串，返回值:数组)
    public static function decrypt($txt){
        $txt = Haxi::key(base64_decode($txt), Haxi::$key_t);
        $tmp = '';
        for($i = 0;$i < strlen($txt); $i++) {
            $md5 = $txt[$i];
            $tmp .= $txt[++$i] ^ $md5;
        }
        $tmp_t = unserialize($tmp);
        return $tmp_t;
    }
     
    public static function key($txt,$encrypt_key){
        $encrypt_key = md5($encrypt_key);
        $ctr = 0;
        $tmp = '';
        for($i = 0; $i < strlen($txt); $i++) {
            $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
            $tmp .= $txt[$i] ^ $encrypt_key[$ctr++];
        }
        return $tmp;
    }
}   

//先引入
use Lib\Haxi;

加密数组$arr
====================

解密数据$_POST['list']
=========================
public function shoppinglist()
{
   $Haxi = new Haxi();
   $a = $Haxi->decrypt($_POST['list']);  //解密
   var_dump($a);
}