php面向对象怎样写实例呢？

<code>class Table {
    public $id = NULL;
    public $title = NUll;
}</code>

<code>$table = new Table();
$table->id = 1000;
$table->title ='映射';

var_dump($table);</code>

<code>class Table {

    public function __set($property,$value){
        return $this->$property = $value;
    }
}</code>

<code>$table = new Table();
$table->id = 1000;
$table->title = 'PHP里__set()怎么用？';
$table->created_at = time();
var_dump($table);
</code>

<code>class Table {
    
    public $tableName = NULL;
    
    public function loadFromMysqlRowResult($row){
        foreach($row as $property=>$value){
            $this->__set($property,$value);
        }
        return $this;
    }

    public function __set($property,$value){
        return $this->$property = $value;
    }
}

class News extends Table {
    
    private $db = NULL;
    
    public function __construct($db){
        $this->db = $db;
        $this->tableName = strtolower(__CLASS__);
    }
    
    public function findOne($id){
        $query = $this->db->query("select * from news where id=".$id)->fetch(PDO::FETCH_ASSOC);
        return self::loadFromMysqlRowResult($query);
    }
    
}

$db = new PDO('mysql:host=localhost;dbname=test','root','c313c313');
$newsModel = new News($db);
$news = $newsModel->findOne(1);
echo $news->title;</code>