php设计模式-数据对象映射模式

<?php
namespace Baobab;

class Hacl{
    public $id;
    public $haclname;
    public $haclcode;
    public $hacls;
    protected $db;

    function __construct($id){
        $this->db = new \Baobab\Database\Mysqli();
        $this->db->connect(‘127.0.0.1‘, ‘root‘, ‘‘, ‘test‘);
        $res = $this->db->query("select * from ha_cl where ID = {$id}");
        $data = $res->fetch_assoc();
        $this->id = $data[‘ID‘];
        $this->haclname = $data[‘ha_cl_name‘];
        $this->haclcode = $data[‘ha_cl_code‘];
        $this->hacls = $data[‘hacls‘];
    }
    function __destruct(){
        $this->db->query("update ha_cl set
                          ha_cl_code = ‘{$this->haclcode}‘,
                          ha_cl_name = ‘{$this->haclname}‘,
                          hacls = ‘{$this->hacls}‘
                          where ID = {$this->id}
                          limit 1");
    }

}

<?php
namespace Baobab;

class Factory{
    static function getHacl($id){
        $key = ‘user_‘.$id;
        $user = \Baobab\Register::get($key);//表中id不同表示的是不同的对象
        if(!$user){
            $user = new \Baobab\Hacl($id);
            \Baobab\Register::set($key, $user);
        }
        return $user;
    }
}

<?php
namespace Baobab;

class Register{
    protected static $objects;
    static function set($alias, $object){
        self::$objects[$alias] = $object;
    }
    
    static function _unset($alias) {
        unset(self::$objects[$alias]);
    }
    
    static function get($name) {
        return self::$objects[$name];
    }
}

class Page{
    function index(){
        $hacl = Baobab\Factory::getHacl(13);
        $hacl->haclname = ‘测试名称‘;
        $this->test();
        echo ‘ok‘;
    }

    function test(){
        $hacl = Baobab\Factory::getHacl(13);
        $hacl->hacls = ‘测试内容‘;
    }
}

$page = new Page();
$page->index();