New in Symfony 6.1: Service Autowiring Attributes
Contributed by
Kevin Bond
in #45657
and #45783.
PHP attributes are arguably one of the new PHP features with more positive impact on how we develop applications. Attributes add structured, machine-readable metadata information in code. In Symfony we added support for them in:
- New in Symfony 5.2: Routing PHP attributes
- New in Symfony 5.2: Constraints as PHP attributes
- New in Symfony 5.2: Controller argument attributes
- New in Symfony 5.3: Service Autoconfiguration attributes
- New in Symfony 5.3: Autowiring Iterators/Locators and Aliases with Attributes
- New in Symfony 6.1: Service Decoration Attributes
In Symfony 6.1 we're introducing another feature related to attributes so you
can configure service autowiring with PHP attributes. In practice, this
means that you can optionally not add any YAML/XML/PHP service configuration in
config/ and configure your services directly in your code stored in src/.
To do so, use the new #[Autowire] attribute in the constructor arguments of
your services (or in the arguments of any controller method):
use Symfony\Component\DependencyInjection\Attribute\Autowire;
class MyService
{
public function __construct(
#[Autowire(service: 'some_service')]
private $service1,
#[Autowire(expression: 'service("App\\Mail\\MailerConfiguration").getMailerMethod()')
private $service2,
#[Autowire(value: '%env(json:file:resolve:AUTH_FILE)%')]
private $parameter1,
#[Autowire(value: '%kernel.project_dir%/config/dir')]
private $parameter2,
) {}
// ...
}In addition to the named arguments (service:, expression:, value:)
you can also use the well-known service syntax used in Symfony's YAML config
(@ for services and @= for expressions):
use Symfony\Component\DependencyInjection\Attribute\Autowire;
class MyService
{
public function __construct(
#[Autowire('@some_service')]
private $service1,
#[Autowire('@=service("App\\Mail\\MailerConfiguration").getMailerMethod()')
private $service2,
#[Autowire('%env(json:file:resolve:AUTH_FILE)%')]
private $parameter1,
) {}
// ...
}About us
What a Symfony developer should know about the framework: News, Jobs, Tweets, Events, Videos,...
- Welcome to Symfony News !
- More About us
- Contact us on contact[at]symfony-news.com