controller.html.twig

    <p>Here are some useful shortcuts and functions regarding the request in Symfony 2 controllers.</p>

    <h4>REQUEST and RESPONSE objects</h4>

    <div class="row">

        <div class="span6">

{% raw %}
<pre><code>$request-&gt;query-&gt;get('foo'); //gets foo GET var.
$request-&gt;request-&gt;get('bar'); //gets POST var.
$request-&gt;getMethod();

$request-&gt;server-&gt;get('HTTP_HOST'); //server variables.
$request-&gt;getPathInfo(); //gets the URI.
$request-&gt;files-&gt;get('file'); //files posted in a form.

$request-&gt;headers-&gt;get('content-type');
$request-&gt;cookies-&gt;get('PHPSESSID'); //cookies

$request-&gt;getLanguages();
$request-&gt;getPreferedLanguage(array('es','fr'));
$request-&gt;isXmlHttpRequest();
</code></pre>{% endraw %}
        </div>

        <div class="span6">

            <p>Redirecting in a controller:</p>

{% raw %}
<pre><code>$this-&gt;redirect($this-&gt;generateUrl("homepage"));
// 2.6 and above
$this->redirectToRoute('homepage');
</code></pre>
{% endraw %}

            <p>Rendering text from a controller:</p>

{% raw %}
<pre><code>return new Response('&lt;html&gt;…&lt;/html&gt;');
</code></pre>{% endraw %}

            <p>Forwarding:</p>

{% raw %}
<pre><code>return $this-&gt;forward('Bundle:Controller:Action');
</code></pre>{% endraw %}

            <p>Redirect to 404 not found:</p>

{% raw %}
<pre><code>throw $this-&gt;createNotFoundException(message);
</code></pre>{% endraw %}
        </div>

    </div>

    <div class="row">

        <div class="span6">

            <h4>Working with the session</h4>

            <p>You can manage session attributes with:</p>

{% raw %}
<pre><code>$session = $this-&gt;getRequest()-&gt;getSession();
</code></pre>{% endraw %}

            <p>or the shortcut version</p>

{% raw %}
<pre><code>$this-&gt;get('session');
</code></pre>{% endraw %}

            <p>and to work with the data:</p>

{% raw %}
<pre><code>$session-&gt;get('foo','default value');
$session-&gt;set('foo','bar');
</code></pre>{% endraw %}
        </div>

        <div class="span6">

            <h4>Flash messages</h4>

            <p>Flash messages only last one request and they are stored in a FlashBag:</p>

{% raw %}
<pre><code>$this-&gt;addFlash('notice','message');
</code></pre>{% endraw %}

            <p>To iterate trough all flash messages in a template you can use:</p>

{% raw %}
<pre><code>{% for flashMessage in app.session.flashbag.get('notice') %}
    &lt;div class="flash notice"&gt;
        {{ flashMessage }}
    &lt;/div&gt;
{% endfor %}
</code></pre>{% endraw %}
        </div>

    </div>

    <p>Finally, here is an example of a controller class with Request and Response object in use.</p>


    {% raw %}<pre><code>namespace Symfony\CheatSheetBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

class DefaultController extends Controller
{
    public function indexAction()
    {
        return $this->render('SymfonyCheatSheetBundle:Default:index.html.twig');
    }

    public function contactAction(Request $request)
    {
        //get request variables.
        //do something, call service, go to database, create form, send emails, etc...
        return $this->render('SymfonyCheatSheetBundle:Default:feedback.html.twig', array([template vars]));
    }
}
</code></pre>{% endraw %}