如何在PHP中实现数据对象映射模式?很多新手对此不是很清楚,为了帮助大家解决这个难题,下面小编将为大家详细讲解,有这方面需求的人可以来学习下,希望你能有所收获。
数据库 test ,user 表结构:
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;
Common\User.php:
<?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");
}
}
Common\Databases\MySQLi.php
<?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);
}
}
入口文件 index.php
<?php
define('BASEDIR',__DIR__); //定义根目录常量
include BASEDIR.'/Common/Loader.php';
spl_autoload_register('\\Common\\Loader::autoload');
echo '<meta http-equiv="content-type" content="text/html;charset=utf8">';
/*
* 对对象属性的操作就完成了对数据库的操作
*/
$user = new Common\User(1);
//读取数据
var_dump($user->id, $user->mobile, $user->name, $user->regtime);exit();
$user->mobile = '13800138000';
$user->name = 'Arshavin';
$user->regtime = date("Y-m-d H:i:s",time());
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