PHP 设计模式 笔记与总结（9）数据对象映射模式

CREATE TABLE `user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(32) CHARACTER SET utf8 DEFAULT NULL,
  `mobile` varchar(11) CHARACTER SET utf8 DEFAULT NULL,
  `regtime` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1;

<?php
namespace Common;

class User{
    public $id;
    public $name;
    public $mobile;
    public $regtime;
    
    protected $db;

    //构造方法
    function __construct($id) {
        $this->db = new Database\MySQLi();
        $conn = $this->db->connect(‘127.0.0.1‘, ‘root‘, ‘‘, ‘test‘);
        $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‘];
    }
    
    //析构方法
    function __destruct() {
        $this->db->query("update user set name = ‘{$this->name}‘, mobile = ‘{$this->mobile}‘, regtime = ‘{$this->regtime}‘ where id = {$this->id} limit 1");
    }
}

<?php
namespace Common\Database;
use Common\IDatabase;

class MySQLi implements IDatabase{
    
    protected $conn;
    function connect($host, $user, $passwd, $dbname){
        $conn = mysqli_connect($host, $user, $passwd ,$dbname);
        $this->conn = $conn;
    }
    
    function query($sql){
        $res = mysqli_query($this->conn, $sql);
        return $res;
    }

    function close(){
        mysqli_close($this->conn);
    }
}

 1 <?php
 2 define(‘BASEDIR‘,__DIR__); //定义根目录常量
 3 include BASEDIR.‘/Common/Loader.php‘;
 4 spl_autoload_register(‘\\Common\\Loader::autoload‘);
 5 echo ‘<meta http-equiv="content-type" content="text/html;charset=utf8">‘;
 6 
 7 /*
 8  * 对对象属性的操作就完成了对数据库的操作
 9  */
10 $user = new Common\User(1);
11 
12 //读取数据
13 var_dump($user->id, $user->mobile, $user->name, $user->regtime);exit();
14 
15 $user->mobile = ‘13800138000‘;
16 $user->name = ‘Arshavin‘;
17 $user->regtime = date("Y-m-d H:i:s",time());

string ‘1‘ (length=1)
string ‘10086‘ (length=5)
string ‘K6‘ (length=2)
string ‘2015-05-07 00:16:12‘ (length=19)