02.10.11 - i18n in Twig extensions with Symfony 2
Add internationalization to Twig extensions in Symfony 2
First of all we have to connect our Twig extension with the translation service. We have to configure the dependency injection container to do that.
Prepare the dependency injection container to load the configuration from an XML file
Connect the Twig extension engine with the translator service (create an XML config file Test/DemoBundle/Resources/config/twig.xml)
Build the Twig extension with the translator as a parameter
And thats all! We can use our new i18n method into all of our DemoBundle Twig templates
Do not forget to activate the i18n in the app/config/config.yml
Prepare the dependency injection container to load the configuration from an XML file
<?php
# Test/DemoBundle/DependencyInjection/TestDemoExtension.php
namespace Test\DemoBundle\DependencyInjection;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
use Symfony\Component\HttpKernel\DependencyInjection\Extension;
use Symfony\Component\Config\FileLocator;
class TestDemoExtension extends Extension
{
public function load(array $configs, ContainerBuilder $container)
{
$loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
$loader->load('twig.xml');
}
public function getAlias()
{
return 'test_demo';
}
}
# Test/DemoBundle/DependencyInjection/TestDemoExtension.php
namespace Test\DemoBundle\DependencyInjection;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
use Symfony\Component\HttpKernel\DependencyInjection\Extension;
use Symfony\Component\Config\FileLocator;
class TestDemoExtension extends Extension
{
public function load(array $configs, ContainerBuilder $container)
{
$loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
$loader->load('twig.xml');
}
public function getAlias()
{
return 'test_demo';
}
}
<?xml version="1.0" ?>
<container xmlns="http://symfony.com/schema/dic/services"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
<services>
<service id="twig.extension.test.demo" class="Test\DemoBundle\Twig\Extension\DemoExtension" public="false">
<tag name="twig.extension" />
<argument type="service" id="translator" />
</service>
</services>
</container>
<container xmlns="http://symfony.com/schema/dic/services"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
<services>
<service id="twig.extension.test.demo" class="Test\DemoBundle\Twig\Extension\DemoExtension" public="false">
<tag name="twig.extension" />
<argument type="service" id="translator" />
</service>
</services>
</container>
<?php
# Test/DemoBundle/Twig/Extension/DemoExtension.php
namespace Test\DemoBundle\Twig\Extension;
use Symfony\Component\Translation\TranslatorInterface;
class DemoExtension extends \Twig_Extension
{
protected $translator;
/**
* Constructor method
*
* @param TranslatorInterface $translator
*/
public function __construct(TranslatorInterface $translator)
{
$this->translator = $translator;
}
/**
* {@inheritdoc}
*/
public function getFunctions()
{
return array(
'translate' => new \Twig_Function_Method($this, 'translate')
);
}
/**
* Dummy function, translates a text
*
* @return string
*/
public function translate ($text)
{
return $this->translator->trans($text);
}
}
# Test/DemoBundle/Twig/Extension/DemoExtension.php
namespace Test\DemoBundle\Twig\Extension;
use Symfony\Component\Translation\TranslatorInterface;
class DemoExtension extends \Twig_Extension
{
protected $translator;
/**
* Constructor method
*
* @param TranslatorInterface $translator
*/
public function __construct(TranslatorInterface $translator)
{
$this->translator = $translator;
}
/**
* {@inheritdoc}
*/
public function getFunctions()
{
return array(
'translate' => new \Twig_Function_Method($this, 'translate')
);
}
/**
* Dummy function, translates a text
*
* @return string
*/
public function translate ($text)
{
return $this->translator->trans($text);
}
}
{{ translate('text') }}
framework:
translator: { fallback: %locale% }
translator: { fallback: %locale% }
Great! thanks for the share!