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Service components

Application may get complicated so it makes sense to extract focused parts of business logic or infrastructure into service components. These components are typically instantiated once and put into dependency injection container.

These components are typically accessed either from other components or from controller. It is typically done via autowiring:

public function actionIndex(ServerRequestInterface $request, MyService $myService): ResponseInterface
    $id = $request->getAttribute('id');
    // ...
    $extraData = $myService->getExtraData($id);
    // ...

Note that in many cases it makes sense to choose more specific class to place your code into. Check:

  • Repository
  • Widget
  • Middleware
  • Entity
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