Symfony: Access $_POST variable from service without going scope request - php

Question

I need to access a $_POST variable from a service and I don't want to pass request as a paramter as I think this forces me to use scope: request in the service and I have bad memories from this scope from the past, as this forces a service instance per request, instead of one instance per application.
The thing is that $_POST works all right, but as symfony best practices recommends to avoid using php primitives I ask if there's a better way to do it (avoiding scope: request in service)

Answer 1

If you are using 2.4+ you can use the request_stack, see here.
You would use it like..
services.yml
your.service:
class: FQCN\To\Your\Service
arguments:
- #request_stack
FQCN\To\Your\Service
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack;
class Service
{
/**
* #var RequestStack
*/
private $requestStack;
/**
* #var Request
*/
private $request;
public function __construct(RequestStack $requestStack)
{
$this->requestStack = $requestStack;
}
public function yourCall()
{
$param = $this->getRequest()->request->get('your-post-parameter');
//...
}
/**
* Get current request object
*
* #return Request
*/
private function getRequest()
{
if (null === $this->request) {
$this->request = $this->requestStack->getCurrentRequest();
}
return $this->request;
}
}

Answer 2

I don't see any problem with doing it like below which is what I did some time ago. You're not injecting whole Request.
CONTROLLER
public function searchByGetAction(Request $request)
{
//.......
$results = $this->productSearchService->findWithSimpleArray(
$request->query
);
//.......
}
public function searchByPostAction(Request $request)
{
//.......
$results = $this->productSearchService->findkWithNestedArray(
json_decode($request->getContent(), true)
);
//.......
}
SERVICE
public function findWithSimpleArray(ParameterBag $searchParameters)
{
$name = $searchParameters->get('name');
$surname = $searchParameters->get('surname');
//.......
}
public function findWithNestedArray($searchParameters = [])
{
$name = isset($searchParameters['name']) ? $searchParameters['name'] : null;
$surname = isset($searchParameters['surname']) ? $searchParameters['surname'] : null;
//.......
}