Symfony SAAS multitenant (DB by tenant). Sharing my implementation - symfony

Question

I people! First: sorry about my english (I'm improving it...). Thanks for edit de post to corret it :)
I'm implementing a SaaS app multitenant on symfony. I wish share with the community what is the way that I've used (mae by not the best, but it works fine...).
THE CONCEPT:
One code (one app).
A DB for each tenant
A CSS for each tenant
Each client have a subdomain like (www.tenant1.myapp.com, www.tenant2.myapp.com)
FIRST: ARRANGING THE CONFIGURATION
I've arranged the configuration files in folders like this:
-app
---config
-----tenantA
--------config.yml
--------config_dev.yml
--------config_prod.yml
--------parameters.yml
-----tenantB
--------config.yml
--------config_dev.yml
--------config_prod.yml
--------parameters.yml
-----services.yml
-----security.yml
DISPATCHER
On AppKernel I've modiffied the registerContainerConfiguration action. It loads de general configuration (DB parameters, twig globals, etc....).
Original:
public function registerContainerConfiguration(LoaderInterface $loader)
{
$loader->load($this->getRootDir().'/config/config_'.$this->getEnvironment().'.yml');
}
New (I used the subdomain to set what is the environment that symfony have to load:
public function registerContainerConfiguration(LoaderInterface $loader)
{
$url= $_SERVER['HTTP_HOST'];
$partes = explode('.',$url);
$tenant= $partes[0]; // this get de subdomain. If the access is www.tenant1.myapp.com this returns tenant1.
$loader->load($this->getRootDir().'/config/'.$tenant.'/config_'.$this->getEnvironment().'.yml');
}
This function goes to the tenant folder and load the config file with his parameters.yml
ARRANGING CACHE AND LOG FOLDERS
I've modified the AppKernel including the functions getCacheDir and getLogDir in order to set the correct folder to save the files:
public function getCacheDir()
{
return $this->rootDir . '/cache/' . $tenant. '/' . $this->environment;
}
public function getLogDir()
{
return $this->rootDir . '/logs/' . $tenant. '/' . $this->environment;
}
This save the files like:
-cache
---tenant1
-----dev
-----prod
---tenant2
-----dev
-----prod
-logs
---tenant1
-----dev.log
-----prod.log
----tenant2
------dev.log
------prod.log
CSS BY TENANT
I've arranged my css files by tenant like this:
--web
---css
----tenant1.css
----tenant2.css
----tenantN.css
Then, in the config.yml of each tenant (remind the arranged folders on app->config) I used a global tiwg with the name of the css theme of the tenant:
twig:
globals:
app_css: tenant1.css
Then, in the tiwg where i've declared the css files and include in the base twig I call the css by:
{% set cssload = "css/" ~ app_css ~ ".css" %}
<link rel="stylesheet" href="/{{cssload}}">
As the cache is saved in diferents folders, the CSS of tenant1 don't affects the cache and the css of tenant2.
Finish: I don't know if this is a good practice, but it works fine, and it's another solution.
Thanks everybody for the help of this days!!!!!