Smarty 設定のカプセル化の問題

define('BASE_PATH',$_SERVER['DOCUMENT_ROOT']);define('SMARTY_PATH','/xampps/ss/smarty/');require BASE_PATH.SMARTY_PATH."Smarty.class.php";          // 调用Smarty文件class SmartyProject extends Smarty{          // 定义类，继承Smarty父类	public function __construct(){                    // 定义构造方法，配置Smarty模板               $this->Smarty();		$this->template_dir = BASE_PATH.SMARTY_PATH."templates/"; // 指定模板文件存储在templates文件夹内		$this->compile_dir = BASE_PATH.SMARTY_PATH."templates_c/";		$this->config_dir = BASE_PATH.SMARTY_PATH."configs/";		$this->cache_dir = BASE_PATH.SMARTY_PATH."cache/";	}}?>

require('Smarty-3.1.18/libs/Smarty.class.php');class mySmarty extends Smarty {  public $tplname = [];  function __construct($tpl) {	parent::__construct();	$this->template_dir = dirname(__FILE__) . '/buffer/templates/';	$this->compile_dir = dirname(__FILE__) . '/buffer/templates_c/';	$this->config_dir = dirname(__FILE__) . '/buffer/configs/';	$this->cache_dir = dirname(__FILE__) . '/buffer/cache/';   }}