service_container_parameters.rst

.. index::
   single: Routing; Service Container Parameters

How to use Service Container Parameters in your Routes

Sometimes you may find it useful to make some parts of your routes globally configurable. For instance, if you build an internationalized site, you'll probably start with one or two locales. Surely you'll add a requirement to your routes to prevent a user from matching a locale other than the locales your support.

You could hardcode your _locale requirement in all your routes. But a better solution is to use a configurable service container parameter right inside your routing configuration:

.. configuration-block::

    .. code-block:: yaml

        contact:
            path:     /{_locale}/contact
            defaults: { _controller: AcmeDemoBundle:Main:contact }
            requirements:
                _locale: %acme_demo.locales%

    .. code-block:: xml

        <?xml version="1.0" encoding="UTF-8" ?>

        <routes xmlns="http://symfony.com/schema/routing"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://symfony.com/schema/routing http://symfony.com/schema/routing/routing-1.0.xsd">

            <route id="contact" path="/{_locale}/contact">
                <default key="_controller">AcmeDemoBundle:Main:contact</default>
                <requirement key="_locale">%acme_demo.locales%</requirement>
            </route>
        </routes>

    .. code-block:: php

        use Symfony\Component\Routing\RouteCollection;
        use Symfony\Component\Routing\Route;

        $collection = new RouteCollection();
        $collection->add('contact', new Route('/{_locale}/contact', array(
            '_controller' => 'AcmeDemoBundle:Main:contact',
        ), array(
            '_locale' => '%acme_demo.locales%',
        )));

        return $collection;

You can now control and set the acme_demo.locales parameter somewhere in your container:

.. configuration-block::

    .. code-block:: yaml

        # app/config/config.yml
        parameters:
            acme_demo.locales: en|es

    .. code-block:: xml

        <!-- app/config/config.xml -->
        <parameters>
            <parameter key="acme_demo.locales">en|es</parameter>
        </parameters>

    .. code-block:: php

        // app/config/config.php
        $container->setParameter('acme_demo.locales', 'en|es');

You can also use a parameter to define your route path (or part of your path):

.. configuration-block::

    .. code-block:: yaml

        some_route:
            path:     /%acme_demo.route_prefix%/contact
            defaults: { _controller: AcmeDemoBundle:Main:contact }

    .. code-block:: xml

        <?xml version="1.0" encoding="UTF-8" ?>

        <routes xmlns="http://symfony.com/schema/routing"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://symfony.com/schema/routing http://symfony.com/schema/routing/routing-1.0.xsd">

            <route id="some_route" path="/%acme_demo.route_prefix%/contact">
                <default key="_controller">AcmeDemoBundle:Main:contact</default>
            </route>
        </routes>

    .. code-block:: php

        use Symfony\Component\Routing\RouteCollection;
        use Symfony\Component\Routing\Route;

        $collection = new RouteCollection();
        $collection->add('some_route', new Route('/%acme_demo.route_prefix%/contact', array(
            '_controller' => 'AcmeDemoBundle:Main:contact',
        )));

        return $collection;

Note

Just like in normal service container configuration files, if you actually need a % in your route, you can escape the percent sign by doubling it, e.g. /score-50%%, which would resolve to /score-50%.

However, as the % characters included in any URL are automatically encoded, the resulting URL of this example would be /score-50%25 (%25 is the result of encoding the % character).

For other usages of the parameter % syntax see :doc:`Configuration </cookbook/configuration>`.