@@ -52,8 +52,8 @@ variable in the route path instead::
5252 /**
5353 * @Route(
5454 * "/hello/{name}.{_format}",
55- * defaults = {"_format"= "html"},
56- * requirements = {"_format"= "html|xml|json"},
55+ * defaults = { = "html"
56+ * requirements = { = "html|xml|json"
5757 * name = "_demo_hello"
5858 * )
5959 * @Template()
@@ -88,6 +88,20 @@ method::
8888
8989 return $this->forward('AcmeDemoBundle:Hello:fancy', array('name' => $name, 'color' => 'green'));
9090
91+ Displaying error pages
92+ ----------------------
93+
94+ Errors will inevitably happen during the execution of every web application.
95+ In the case of ``404 `` errors, Symfony includes a handy shortcut that you can
96+ use on your controllers::
97+
98+ throw $this->createNotFoundException();
99+
100+ For ``500 `` errors, just throw a regular PHP exception inside the controller and
101+ Symfony will transform it in a proper ``500 `` error page::
102+
103+ throw new \Exception('Something went wrong!');
104+
91105Getting information from the Request
92106------------------------------------
93107
@@ -140,7 +154,7 @@ from any controller::
140154 $foo = $session->get('foo');
141155
142156 // use a default value if the attribute doesn't exist
143- $filters = $session->get('filters ',array() );
157+ $foo = $session->get('foo ','default_value' );
144158 }
145159
146160You can also store "flash messages" that will auto-delete after the next request.
@@ -150,11 +164,8 @@ redirecting the user to another page (which will then show the message)::
150164 // store a message for the very next request (in a controller)
151165 $session->getFlashBag()->add('notice', 'Congratulations, your action succeeded!');
152166
153- // display any messages back in the next request (in a template)
154-
155- {% if app.session.flashbag.has('notice') %}
156- <div>{{ app.session.flashbag.get('notice') }}</div>
157- {% endfor %}
167+ // display the flash message in the template
168+ <div>{{ app.session.flashbag.get('notice') }}</div>
158169
159170Caching Resources
160171-----------------