Symfony2 set global parameter based on subdomain - php

Question

using symfony 2.8, i'm working with subdomains and i want to show different (lets say)home pages depending on the subdomain, i'm storing the subdomains in Domain table with a column named subdomain. ideally when the user visits sub.example.com i want to search the database for 'sub' and get the id of that row and set that as a global parameter for that specific domain, so that i can load the websitesettings and load other dynamic data from the database (using domain_id as the key)
this is what i presume to be correct, if there are better methods to deal with this same problem, please let me know, i might get a friend to give out a bounty if its new to me.

Answer 1

I suggest you listen to the kernel.controller event. Make sure your listener is container aware so that you can set the parameter by doing $this->container->setParameter('subdomain', $subdomain);
At this point you just need to check the parameter you set where it suits you, for example in your controller action so that you can return, for example, different views according to the current subdomain.
Reference:
Container aware dispatcher
Symfony2 framework events

Answer 2

Have a look at my implementation, using a YAML configuration instead of a database: https://github.com/fourlabsldn/HostsBundle. You might be able to get some inspiration.
<?php
namespace FourLabs\HostsBundle\Service;
use Symfony\Component\HttpFoundation\RequestStack;
use FourLabs\HostsBundle\Model\DomainRepository;
use FourLabs\HostsBundle\Exception\NotConfiguredException;
abstract class AbstractProvider
{
/**
* #var RequestStack
*/
protected $requestStack;
/**
* #var DomainRepository
*/
protected $domainRepository;
/**
* #var boolean
*/
protected $requestActive;
public function __construct(RequestStack $requestStack, DomainRepository $domainRepository, $requestActive)
{
$this->requestStack = $requestStack;
$this->domainRepository = $domainRepository;
$this->requestActive = $requestActive;
}
protected function getDomainConfig()
{
$request = $this->requestStack->getCurrentRequest();
if(is_null($request) || !$this->requestActive) {
return;
}
$host = parse_url($request->getUri())['host'];
if(!($domain = $this->domainRepository->findByHost($host))) {
throw new NotConfiguredException('Domain configuration for '.$host.' missing');
}
return $domain;
}
}
and the listener
<?php
namespace FourLabs\HostsBundle\EventListener;
use FourLabs\HostsBundle\Service\LocaleProvider;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\HttpKernelInterface;
class LocaleListener
{
/**
* #var LocaleProvider
*/
private $localeProvider;
public function __construct(LocaleProvider $localeProvider) {
$this->localeProvider = $localeProvider;
}
public function onKernelRequest(GetResponseEvent $event) {
if(HttpKernelInterface::MASTER_REQUEST !== $event->getRequestType()) {
return;
}
$event->getRequest()->setLocale($this->localeProvider->getLocale());
}
}