Slim uses an optional dependency container to prepare, manage, and inject application dependencies. Slim supports containers that implement PSR-11 like PHP-DI.
You don’t have to provide a dependency container.
If you do, however, you must provide an instance of the container to AppFactory before creating an App.
<?php
use DI\Container;
use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Slim\Factory\AppFactory;
require __DIR__ . '/../vendor/autoload.php';
// Create Container using PHP-DI
$container = new Container();
// Set container to create App with on AppFactory
AppFactory::setContainer($container);
$app = AppFactory::create();
Add a service to your container:
$container->set('myService', function () {
$settings = [...];
return new MyService($settings);
});
You can fetch services from your container explicitly as well as from inside a Slim application route like this:
/**
* Example GET route
*
* @param ServerRequestInterface $request PSR-7 request
* @param ResponseInterface $response PSR-7 response
* @param array $args Route parameters
*
* @return ResponseInterface
*/
$app->get('/foo', function (Request $request, Response $response, $args) {
$myService = $this->get('myService');
// ...do something with $myService...
return $response;
});
To test if a service exists in the container before using it, use the has() method, like this:
/**
* Example GET route
*
* @param ServerRequestInterface $request PSR-7 request
* @param ResponseInterface $response PSR-7 response
* @param array $args Route parameters
*
* @return ResponseInterface
*/
$app->get('/foo', function (Request $request, Response $response, $args) {
if ($this->has('myService')) {
$myService = $this->get('myService');
}
return $response;
});
In case you want to create the App with dependencies already defined in your container, you can use the AppFactory::createFromContainer() method.
Example
<?php
use App\Factory\MyResponseFactory;
use DI\Container;
use Psr\Container\ContainerInterface;
use Psr\Http\Message\ResponseFactoryInterface;
use Slim\Factory\AppFactory;
require_once __DIR__ . '/../vendor/autoload.php';
// Create Container using PHP-DI
$container = new Container();
// Add custom response factory
$container->set(ResponseFactoryInterface::class, function (ContainerInterface $container) {
return new MyResponseFactory(...);
});
// Configure the application via container
$app = AppFactory::createFromContainer($container);
// ...
$app->run();
Supported App dependencies are: