Zend Framework, bind subdomains to modules

Params:

Zend Framework 1.11, PHP-5.3, Apache 2.2, local pc with Gentoo on board.

Problem:

I want to bind subdomains to certain module of Zend Framework application.

Example: 

http://mysite.com - follow to default module of my app.

http://admin.mysite.com - follow to admin module.

Controllers, actions and params may be various(global variables also):
http://admin.mysite.com/index/index/foo/bar/......

etc.

Solution:

1) Create site with default Zend Framework module structure.

/var/www/mysite.com/

   application/

      configs/

      modules/

         admin/

            controllers/

            views/

         default/

            ......

      Bootstrap.php

   ......

2) Bind DocumentRoot folder of mysite.com, www.mysite.com, admin.mysite.com to the same folder. In my case it's:
/var/www/mysite.com/public

3) In Bootstrap.php file init application router:

 protected function _initRouter()

{

$router = Zend_Controller_Front::getInstance()->getRouter();

$hostnameDefaultRoute = new Zend_Controller_Router_Route_Hostname(':module.mysite.com'  , array('module' => 'default'));

$router->addRoute('default', $hostnameDefaultRoute->chain(new Zend_Controller_Router_Route(':lang/:controller/:action/*', array('lang' => 'en', 'controller'=>'index', 'action'=>'index'))));

  $hostnameDefaultRoute = new Zend_Controller_Router_Route_Hostname('mysite.com'  , array('module' => 'default'));

$router->addRoute('www', $hostnameDefaultRoute->chain(new Zend_Controller_Router_Route(':lang/:controller/:action/*', array('lang' => 'ru', 'controller'=>'index', 'action'=>'index'))))

->addRoute('login'  , $hostnameDefaultRoute->chain(new Zend_Controller_Router_Route_Static('login',   array('controller' => 'user', 'action'=>'login'))));

// routes for admin area

$hostnameAdminRoute = new Zend_Controller_Router_Route_Hostname('admin.mysite.com', array('module' => 'admin'));

$router->addRoute('admin' , $hostnameAdminRoute->chain(new Zend_Controller_Router_Route(':lang/:controller/:action/*',   array('lang' => 'en', 'controller'=>'index', 'action'=>'index'))))

->addRoute('settings' , $hostnameAdminRoute->chain(new Zend_Controller_Router_Route_Static('settings', array('controller' => 'config', 'action' => 'list'))));

}

==================================================================

In a result will work this url's:

mysite.com/ -> Module: default, IndexController, indexAction, lang: en

mysite.com/en/index/index -> Module: default, IndexController, indexAction, lang: en

mysite.com/en/index/index/foo/bar -> Module: default, IndexController, indexAction, lang: en , params: foo = bar

mysite.com/login -> Module: default, UserController, loginAction

admin.mysite.com -> Module: admin, indexController, indexAction, lang: en

admin.mysite.com/en/ -> Module: admin, indexController, indexAction, lang: en

admin.mysite.com/settings -> Module: admin, configController, listAction

4) Also you can use route names in view helper URL. In view script:

echo $this->url(array(), 'www') will output 'mysite.com/en/index/index'

echo $this->url(array('foo' => 'bar'), 'www') will output 'mysite.com/en/index/index/foo/bar'

echo $this->url(array(), 'login') will output 'mysite.com/login'

echo $this->url(array('page' => 1), 'admin') will output 'admin.mysite.com/en/index/index/page/1'

echo $this->url(array(), 'settings') will output 'admin.mysite.com/settings'

Also you can specify controllers and actions

echo $this->url(array('controller' => 'post', 'action' => 'list'), 'www') will output 'mysite.com/en/post/list'

echo $this->url(array('action' => 'print', 'id' => 2), 'admin') will output 'admin.mysite.com/en/index/print/id/2'