<\/p>

<\/p>

The controller is simple, it creates a new Response object whose first parameter is the response content it returns (in this case It's a small HTML page). <\/p>

Congratulations, just after creating a route and controller, you have got a fully functional page! If your settings are correct, your application will be able to greet you: <\/p>

http:\/\/localhost\/app_dev.php\/hello\/Ryan<\/pre>
 <\/p>
<\/p>
An optional but often used step is Create a template. <\/p>
Controllers are the main entry point and key part when creating pages, more information can be found in the Controllers chapter. <\/p>
Create Templates<\/p>
Templates allow you to put all presentation (such as HTML code) into a single file and reuse different parts of the page layout. The following code uses a template to replace the HTML code in the controller. <\/p>
\/\/ src\/Acme\/StudyBundle\/Controller\/HelloController.php\r\nnamespace Acme\\StudyBundle\\Controller;\r\nuse Symfony\\Bundle\\FrameworkBundle\\Controller\\Controller;\r\nclass HelloController extends Controller\r\n{\r\n  public function indexAction($name)\r\n  {\r\n    return $this->render('AcmeStudyBundle:Hello:index.html.twig', array('name' => $name));\r\n    \/\/ 渲染PHP模板\r\n    \/\/ return $this->render('AcmeStudyBundle:Hello:index.html.php', array('name' => $name));\r\n  }\r\n}<\/pre>
 <\/p>
<\/p>
In order to use the render() method, you must inherit the Controller class, which adds shortcut methods for some common tasks. The <\/p>
render() method creates a Response object that is filled with specific content and rendered through a template. Like other controllers, what you end up with is a Response object. <\/p>
注意，這里有兩種不同渲染模板的例子，缺省情況下，Symfony2支持兩種渲染模板的方式：傳統(tǒng)的PHP模板和簡(jiǎn)潔強(qiáng)大的Twig模板。你可以隨意選擇使用其中的一種，也可以在同一項(xiàng)目中混用它們，這都不成問(wèn)題。<\/p>
控制器渲染AcmeStudyBundle:Hello:index.html.twig模板，該模板使用以下命名約定：<\/p>
Bundle名:Controller名:Template名<\/p>
在本例中，AcmeStudyBundle是Bundle名，Hello是控制器，index.html.twig是模板名。<\/p>
{# src\/Acme\/StudyBundle\/Resources\/views\/Hello\/index.html.twig #}\r\n{% extends '::layout.html.twig' %}\r\n{% block body %}\r\n  Hello {{ name }}!\r\n{% endblock %}<\/pre>
   <\/p>
<\/p>
讓我們一行行地來(lái)：第2行：extends定義了一個(gè)父模板，模板明確定義了一個(gè)將被替換的布局文件；第4行：block表示其中的內(nèi)容將會(huì)替換掉名為body的block，如我們所知，它在最終渲染時(shí)將負(fù)責(zé)layout.html.twig中名為body的block的渲染。父模板::layout.html.twig省略了它的bundle名和控制器名（所以用兩個(gè)冒號(hào)::代替），這意味著該模板在bundle外面，在app目錄中。<\/p>
{# app\/Resources\/views\/layout.html.twig #}\r\n\r\n\r\n  \r\n    \r\n