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Config extension🔗

Symfony configuration extension without bundle.

Installation🔗

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composer require symfony/config symfony/dependency-injection

How to🔗

Define a configuration tree:

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namespace App\Infra\DependencyInjection;

use Symfony\Component\Config\Definition\Builder\TreeBuilder;
use Symfony\Component\Config\Definition\ConfigurationInterface;

class FoobarConfiguration implements ConfigurationInterface
{
    public function getConfigTreeBuilder()
    {
        $treeBuilder = new TreeBuilder('foobar');
        $root = $treeBuilder->getRootNode();

        $root
            ->children()
                ->scalarNode('foo')->end()
            ->end()
        ;

        return $treeBuilder;
    }
}

Create the extension:

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namespace App\Infrastructure\DependencyInjection;

use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Extension\Extension;

class FoobarExtension extends Extension
{
    public function load(array $configs, ContainerBuilder $container)
    {
        $configuration = new FoobarConfiguration();
        $config = $this->processConfiguration($configuration, $configs);

        $container->setParameter('foobar.foo', $config['foo']);
    }
}

Then register your extension in the kernel:

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namespace App;

use App\Infra\DependencyInjection\FoobarExtension;
use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Kernel as BaseKernel;

class Kernel extends BaseKernel
{
    use MicroKernelTrait;

    // ...

    protected function build(ContainerBuilder $container)
    {
        $container->registerExtension(new FoobarExtension());
    }
}

Note: You can register as many extension you want.

And use the configuration:

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# config/packages/foobar.yaml
foobar:
    foo: bar

You can now use the the parameters foobar.foo in services.

Last update: December 20, 2024