是在析構方法中實現的。

這個問題好。??！么么噠

user.php代碼需要修改一下

<?php
namespace?IMooc;

class?User
{
????//數據庫表
????public?$id;
????public?$name;
????public?$mobile;
????public?$regtime;
????public?$seril_no;

????protected?$data;
????protected?$db;

????function?__construct($id)
????{
????????/**
?????????*?適配器模式-統一接口
?????????*?工廠模式,在一個地方創建對象
?????????*?注冊樹模式,同一個對象,只創建一次
?????????*/
????????$this->db?=?\IMooc\Factory::createDBMySQLi();
????????$this->db->connect('localhost',?'root',?'',?'test',?'utf8');
????????$res?=?$this->db->query("select?*?from?user?where?id?=?{$id}?limit?1");
????????$data?=?$res->fetch_assoc();

????????$this->id?=?$data['id'];
????????$this->name?=?$data['name'];
????????$this->mobile?=?$data['mobile'];
????????$this->regtime?=?$data['regtime'];
????????$this->seril_no?=?$data['seril_no'];
????}

????//析構方法
????function?__destruct()
????{
????????$this->db->query("update?user?set?name?='{$this->name}',?mobile='{$this->mobile}',
??????????regtime='{$this->regtime}',?seril_no='{$this->seril_no}'??where?id?=?{$this->id}?limit?1");
????}
}

你再看一下第8章 數據對象映射模式~~多看看就知道了

前面封裝好了呀，當對象destroy銷毀的時候寫的應該是