Slim 使用可选的依赖容器来准备、管理和注入应用程序依赖项。Slim 支持像PHP-DI这样实现PSR-11 的容器。
您不必提供依赖项容器。但是，如果这样做，则必须AppFactory在创建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();
向您的容器添加服务：
$container->set('myService', function () {
$settings = [...];
return new MyService($settings);
});
您可以显式地从您的容器中获取服务，也可以像这样从 Slim 应用程序路由中获取服务：
/**
* 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;
});
要在使用服务之前测试容器中是否存在服务，请使用has()如下方法：
/**
* 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;
});
如果你想创建App容器中已经定义的依赖项，你可以使用该AppFactory::createFromContainer()方法。
例子
<?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();
支持的App依赖项是：