Php Kostache-before（）方法

在kostache模块中是否有类似于before（）的方法？例如，如果我在视图文件中有两行PHP代码，我希望在视图类中分别执行它们，而不回显模板本身中的任何内容。如何处理该问题？

您可以将此类代码放入视图类的构造函数中。当视图被实例化时，代码将运行

下面是一个工作应用程序的（稍加修改）示例。此示例演示了一个ViewModel，可用于更改用作站点主布局的胡子文件。在构造函数中，它选择一个默认布局，如果需要，可以覆盖该布局

控制器：

class Controller_Pages extends Controller
{
    public function action_show()
    {
        $current_page = Model_Page::factory($this->request->param('name'));

        if ($current_page == NULL) {
            throw new HTTP_Exception_404('Page not found: :page',
                array(':page' => $this->request->param('name')));
        }

        $view = new View_Page;
        $view->page_content = $current_page->Content;
        $view->title = $current_page->Title;

        if (isset($current_page->Layout) && $current_page->Layout !== 'default') {
            $view->setLayout($current_page->Layout);
        }

        $this->response->body($view->render());
    }
}

class View_Page
{
    public $title;

    public $page_content;

    public static $default_layout = 'mytemplate';
    private $_layout;

    public function __construct()
    {
        $this->_layout = self::$default_layout;
    }

    public function setLayout($layout)
    {
        $this->_layout = $layout;
    }

    public function render($template = null)
    {
        if ($this->_layout != null)
        {
            $renderer = Kostache_Layout::factory($this->_layout);
            $this->template_init();
        }
        else
        {
            $renderer = Kostache::factory();
        }

        return $renderer->render($this, $template);
    }
}

视图模型：

class Controller_Pages extends Controller
{
    public function action_show()
    {
        $current_page = Model_Page::factory($this->request->param('name'));

        if ($current_page == NULL) {
            throw new HTTP_Exception_404('Page not found: :page',
                array(':page' => $this->request->param('name')));
        }

        $view = new View_Page;
        $view->page_content = $current_page->Content;
        $view->title = $current_page->Title;

        if (isset($current_page->Layout) && $current_page->Layout !== 'default') {
            $view->setLayout($current_page->Layout);
        }

        $this->response->body($view->render());
    }
}

class View_Page
{
    public $title;

    public $page_content;

    public static $default_layout = 'mytemplate';
    private $_layout;

    public function __construct()
    {
        $this->_layout = self::$default_layout;
    }

    public function setLayout($layout)
    {
        $this->_layout = $layout;
    }

    public function render($template = null)
    {
        if ($this->_layout != null)
        {
            $renderer = Kostache_Layout::factory($this->_layout);
            $this->template_init();
        }
        else
        {
            $renderer = Kostache::factory();
        }

        return $renderer->render($this, $template);
    }
}