数据库实例化操作的代码优化写法，核心种进行精简了…

class ActiveRecord

{

    public $table;

    public $data;

    public $obj;    

    public function __construct($table)

    {

    		$this->table = $table;

        $this->data  = array();        

        $this->obj = '';

        $this->connect();

    }

    public function connect()

    {

        $config = array_change_key_case(require("Conf/config.php"));

        if ((!empty($config['db_host'])) && (!empty($config['db_user'])) && (!empty($config['db_name']))) {

            $db_host = $config['db_host'];

            $db_user = $config['db_user'];

            $db_pwd  = $config['db_pwd'];

            $db_name = $config['db_name'];

            $con     = mysql_connect($db_host, $db_user, $db_pwd);

            mysql_select_db($db_name, $con);

            mysql_query("SET NAMES UTF8");

        }

    }

    public function __set($name, $value)

    {

        $this->data[$name] = $value;

        if(is_object($this->obj)) {

        	$this->obj->$name = $value;

      	}

    }

    public function __get($name)

    {

    	if(is_object($this->obj)) {

        	return $this->obj->$name;

      	}

    }

    public function add()