@@ -141,36 +141,14 @@ either the ``app.php`` (for the ``prod`` environment) or the ``app_dev.php``
141141:doc: `Installing Symfony2 </book/installation >`.
142142
143143If you open up one of these files, you'll quickly see that the environment
144- used by each is explicitly set:
144+ used by each is explicitly set::
145145
146- ..code-block ::php
147- :linenos:
148-
149- <?php
150-
151- use Symfony\Component\ClassLoader\ApcClassLoader;
152- use Symfony\Component\HttpFoundation\Request;
153-
154- $loader = require_once __DIR__.'/../app/bootstrap.php.cache';
155-
156- // Use APC for autoloading to improve performance.
157- // Change 'sf2' to a unique prefix in order to prevent cache key conflicts
158- // with other applications also using APC.
159- /*
160- $loader = new ApcClassLoader('sf2', $loader);
161- $loader->register(true);
162- */
163-
164- require_once __DIR__.'/../app/AppKernel.php';
165- //require_once __DIR__.'/../app/AppCache.php';
146+ // web/app.php
147+ // ...
166148
167149 $kernel = new AppKernel('prod', false);
168- $kernel->loadClassCache();
169- //$kernel = new AppCache($kernel);
170- $request = Request::createFromGlobals();
171- $response = $kernel->handle($request);
172- $response->send();
173- $kernel->terminate($request, $response);
150+
151+ // ...
174152
175153As you can see, the ``prod `` key specifies that this environment will run
176154in the ``prod `` environment. A Symfony2 application can be executed in any
@@ -189,14 +167,14 @@ environment by using this code and changing the environment string.
189167..sidebar ::*Debug* Mode
190168
191169 Important, but unrelated to the topic of *environments * is the ``false ``
192- key on line 8 of thefront controller above . This specifies whether or
193- not the application should run in "debug mode". Regardless of the environment,
194- a Symfony2 application can be run with debug mode set to `` true `` or
195- `` false ``. This affects many things in the application, such as whether
196- or not errors should be displayed or if cache files are dynamically rebuilt
197- on each request. Though not a requirement, debug mode is generally set
198- to ``true `` for the ``dev `` and ``test `` environments and `` false `` for
199- the ``prod `` environment.
170+ argument as the second argument to the`` AppKernel `` constructor . This
171+ specifies whether or not the application should run in "debug mode". Regardless
172+ of the environment, a Symfony2 application can be run with debug mode
173+ set to `` true `` or `` false ``. This affects many things in the application,
174+ such as whether or not errors should be displayed or if cache files are
175+ dynamically rebuilt on each request. Though not a requirement, debug mode
176+ is generally set to ``true `` for the ``dev `` and ``test `` environments
177+ and `` false `` for the ``prod `` environment.
200178
201179 Internally, the value of the debug mode becomes the ``kernel.debug ``
202180 parameter used inside the:doc: `service container </book/service_container >`.
@@ -287,35 +265,15 @@ the ``prod`` environment, except for any changes explicitly made here.
287265
288266Because you'll want this environment to be accessible via a browser, you
289267should also create a front controller for it. Copy the ``web/app.php `` file
290- to ``web/app_benchmark.php `` and edit the environment to be ``benchmark ``:
268+ to ``web/app_benchmark.php `` and edit the environment to be ``benchmark ``::
291269
292- ..code-block ::php
293-
294- <?php
295-
296- use Symfony\Component\ClassLoader\ApcClassLoader;
297- use Symfony\Component\HttpFoundation\Request;
298-
299- $loader = require_once __DIR__.'/../app/bootstrap.php.cache';
270+ // web/app_benchmark.php
300271
301- // Use APC for autoloading to improve performance.
302- // Change 'sf2' to a unique prefix in order to prevent cache key conflicts
303- // with other applications also using APC.
304- /*
305- $loader = new ApcClassLoader('sf2', $loader);
306- $loader->register(true);
307- */
308-
309- require_once __DIR__.'/../app/AppKernel.php';
310- //require_once __DIR__.'/../app/AppCache.php';
311272
273+ // change just this line
312274 $kernel = new AppKernel('benchmark', false);
313- $kernel->loadClassCache();
314- //$kernel = new AppCache($kernel);
315- $request = Request::createFromGlobals();
316- $response = $kernel->handle($request);
317- $response->send();
318- $kernel->terminate($request, $response);
275+
276+ // ...
319277
320278The new environment is now accessible via::
321279