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====== Configuring Symfony (and Environments) ======
The main configuration file lives in the app/config/ as a YAML, XML, (and/?) or PHP file. Only YAML is considered here.

<file yaml app/config/config.yml>
imports:
    - { resource: parameters.yml }
    - { resource: security.yml }

framework:
    secret:          "%secret%"
    router:          { resource: "%kernel.root_dir%/config/routing.yml" }
    # ...

# Twig Configuration
twig:
    debug:            "%kernel.debug%"
    strict_variables: "%kernel.debug%"

# ...
</file>

===== Default Configuration Dump =====
Dump the default configuration for a bundle in YAML to the console:
<code bash>
$ app/console config:dump-reference FrameworkBundle  # using Bundle name
$ app/console config:dump-reference framework        # using configuration key
</code>

===== Environments =====

Different environments share the same PHP code (apart from the front controller), but use different configuration. A Symfony project generally begins with three environments: ''dev'', ''test'', and ''prod''.

  * Access ''dev'': http://localhost/app_dev.php/random/10
  * Access ''prod'': http://localhost/app.php/random/10
  * The ''test'' environment is used when running automated tests and cannot be accessed directly through the browser. See the [[http://symfony.com/doc/current/book/testing.html|testing chapter]].

To clear ''prod'' cache, rebuid stuff, etc.:
<code bash>
$ php app/console cache:clear --env=prod --no-debug
</code>

==== Additional Environments ====

To create a new environment, copy ''web/app.php'' (or ''web/app_dev.php''?) to a new file and in that file associate the AppKernel with a new environment name in the ''AppKernel'' ctor;
<code php>
$kernel = new AppKernel('newname', false);
</code>

Then create a config file that matches the environment name but prefixed with ''config_'':

<file yaml app/config/config_newname.yml>
imports:
    - { resource: config.yml }

framework:
    router:   { resource: "%kernel.root_dir%/config/routing_dev.yml" }
    profiler: { only_exceptions: false }

# ...
</file>