yii2 urlManager + .htaccess = subdomain how to? - .htaccess

Question

here's the challenge: i need to make the imitation of subdomains. Actually all the "subdomains" in the project are simple actions of the main SiteController like
example.com/index.php/site/subsite?id=subname
example.com/index.php/site/about?id=subname
example.com/index.php/site/contacts?id=subname
etc. I need them to look like
subname.example.com/
subname.example.com/about
subname.example.com/contacts
etc. I have included urlManager rules like this:
'rules' => [
'http://<id:\w+>.site.com/about' => 'site/about',
'http://<id:\w+>.site.com/contacts' => 'site/contacts',
'http://<id:\w+>.site.com' => 'site/subsite',
],
And made a .htaccess file that is :
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{HTTP_HOST} ^([a-zA-Z0-9]*).site.com [NC]
RewriteRule %{HTTP_HOST} "^([a-zA-Z0-9]*)$.site.com" "site.com/index.php/subsite?id=$1" [L]
But it (predictably) doesnt work as i am not strong in rewrite rules. What am i doing wrong ?

Answer 1

I would do it like this:
Configure one virtual host on web server to host all subdomain and point to the Yii2 application
Write component Subdomain.php and put it in frontend\components
<?php
namespace frontend\components;
use Yii;
use yii\base\Component;
class Subdomain extends Component {
private $_subdomain = false;
public function init() {
parent::init();
list($this->_subdomain) = explode('.', $_SERVER['HTTP_HOST']);
}
public function __toString() {
return $this->_subdomain;
}
}
?>
In frontend\config\main.php in the 'components' section add:
'subdomain' => [
'class' => 'frontend\components\Subdomain'
],
Then in the project where I need subdomain I would use:
$subdomain = \Yii::$app->subdomain;