The symfony/dependency-injection package is a valuable PHP utility that backs up programming architecture by standardizing and centralizing the construction process of objects within your application. This significant aspect of coding, known as Dependency Injection (DI), serves to ease maintainability and increase the scalability of applications by implementing modular development and promoting code reusability.
It's straightforward to start using symfony/dependency-injection in your projects. You start by using Composer to add the package to your project like this:
composer require symfony/dependency-injection
And then, you can make use of Symfony's Dependency Injection capabilities in your code like this:
use Symfony\Component\DependencyInjection\ContainerBuilder;
$container = new ContainerBuilder();
$container
->register('my_service', 'My\Class\To\Load')
->addArgument('First argument')
->addArgument(new Reference('another_service'))
->addArgument('%my_param%');
In the above example, my_service is registered with the container as an instance of My\Class\To\Load. You can pass values, references to other services, or placeholders for parameters to the registered service.
For comprehensive information about this package, Symfony provides an expansive, user-friendly documentation which can be visited at this URL: Symfony DependencyInjection Component Documentation. This documentation includes information about the package's architecture, use-cases and ample examples of how to get started and make the most of the tool in your development work. You can also find detailed instructions on how to report issues and send pull requests in this documentation.
