//测试分布式算法

        $ports = array('端口1', '端口2', '端口3', '端口4', '端口5');    //Memcache端口

        $users = array('1000', '1001', '1002', '1004', '9803');        //登录用户

        foreach ($users as $u){

            $crc = crc32($u);

            $mod = abs($crc % count($ports));

            echo "用户{$u}被分配到了{$ports[$mod]}里。<br />";

        }