PHPデータオブジェクトマッピングモードの例の詳細な説明

<?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(&#39;127.0.0.1&#39;, &#39;root&#39;, &#39;&#39;, &#39;test&#39;);
$res = $this->db->query("select * from ha_cl where id = {$id}");
$data = $res->fetch_assoc();
$this->id = $data[&#39;ID&#39;];
$this->haclname = $data[&#39;ha_cl_name&#39;];
$this->haclcode = $data[&#39;ha_cl_code&#39;];
$this->hacls = $data[&#39;hacls&#39;];
}
function destruct(){
$this->db->query("update ha_cl set
ha_cl_code = &#39;{$this->haclcode}&#39;,
ha_cl_name = &#39;{$this->haclname}&#39;,
hacls = &#39;{$this->hacls}&#39;
where ID = {$this->id}
limit 1");
}
}

<?php
namespace Baobab;
class Factory{
static function getHacl($id){
$key = &#39;user_&#39;.$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;
}
}