class db {

private $host;

private $user;

private $pwd;

private $dbname;

private $Mysqli;

function __construct($host, $user, $pwd, $dbname) {

$this->host = $host;

$this->user = $user;

$this->pwd = $pwd;

$this->dbname = $dbname;

$this->db();

}

function db() {

$this->mysqli = new mysqli ( $this->host, $this->user, $this->pwd, $this->dbname );

}

function select() {

$this->mysqli->query("SET CHARSET GBK");

$sql = "SELECT id,cname FROM hdw_channel";

$result = $this->mysqli

->query ( $sql );

$rows = array ();

while ( $row = $result->fetch_assoc () ) {

$rows [] = $row;

}

ECHO "

";

print_r ( $rows );

}

function __wakeup(){   //反序列化，

$this->db();

}

}

$chanel = new db("localhost",'root','','hdcms');

//$chanel->select();

session_start();

$_SESSION['channel_obj'] = serialize($chanel);   //将对象序列化，保存的是对象的属性，没有方法，所以要用__wakeup()

class ren{

private $name;

private $age;

function __construct($name,$age){

$this->name =$name;

$this->age = $age;

}

function show(){

echo "姓名是：{$this->name}  年龄是：{$this->age}";

}

function __sleep(){

return array_keys(get_object_vars($this));  //或得数组里边的键名，序列化某些变量

}

}

$zao = new ren("赵六",44);

echo serialize($zao);       //序列化(指定哪个变量序列化)

====================================

session_start();

include '59.php';

$channel_obj=unserialize($_SESSION['channel_obj']);  //反序列化类对象

$channel_obj->select();  //有了__wakeup方法才可以起作用

方法二：

用json_encode写入，再用json_decode输出

json_encode之前，把所有数组内所有内容都用urlencode()处理一下，然用json_encode()转换成json字符串，最后再用urldecode()将编码过的中文转回来。