UriPrefixVoter for Sylius backend

services.yaml

# File: <project>/config/services.yaml
services:
    app.listener.prefix.menu_voter:
        class: App\Voter\UriPrefixVoter
        arguments: [ "@request_stack" ]
        tags:
            - { name: knp_menu.voter }

UriPrefixVoter.php

<?php

// File: <project>/src/Voter/UriPrefixVoter.php

namespace App\Voter;

use Knp\Menu\ItemInterface;
use Knp\Menu\Matcher\Voter\VoterInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\Routing\Route;

class UriPrefixVoter implements VoterInterface
{
    /**
     * @var RequestStack|null
     */
    private $requestStack;

    /**
     * UriPrefixVoter constructor.
     * @param RequestStack|null $requestStack
     */
    public function __construct(RequestStack $requestStack = null)
    {
        $this->requestStack = $requestStack;
    }

    /**
     * {@inheritdoc}
     */
    public function matchItem(ItemInterface $item)
    {
        $request = $this->getRequest();
        if (!$request) {
            return null;
        }

        $currentUriPrefix = $item->getUri();
        $strncpmValue = strncmp($request->getPathInfo(), $currentUriPrefix, strlen($currentUriPrefix));

        if (0 === $strncpmValue && null !== $currentUriPrefix) {
            return true;
        }

        return false;
    }

    /**
     * @return Request|null
     */
    private function getRequest()
    {
        if ($this->requestStack) {
            return $this->requestStack->getMasterRequest();
        }

        return null;
    }
}