remove index.php of codeigniter subdomains

[eluser]Unknown[/eluser]
this is my directory:

Code:

-root
       -CI
         -application
         -system

       -sub-domain1 (codeigniter )
         -application
  
       -sub-domain2 (codeigniter )
         -application
  

       -www
         -folder1
         -folder2
         .....
         -folder10
         -sub-domain1
             -index.php (used for codeigniter)
         -sub-domain2
             -index.php (used for codeigniter)
         -file1.php
         -file2.php
         -file3.php
         .....
         -file10.php
         -index.php (used for codeigniter)
         - .htaccess

in my application/config/config.php is:

Code:

$config['index_page'] = "";

I didn't have the sub-domain1 and sub-domain2 and I wanted to apply them now. I am using same system for all CIs. I used the following htaccess file and it works perfect.

Code:

RewriteEngine On
    RewriteBase /

    #Removes access to the system folder by users.
    #Additionally this will allow you to create a System.php controller,
    #previously this would not have been possible.
    #'system' can be replaced if you have renamed your system folder.
    RewriteCond %{REQUEST_URI} ^system.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]
    
    #When your application folder isn't in the system folder
    #This snippet prevents user access to the application folder
    #Submitted by: Fabdrol
    #Rename 'application' to your applications folder name.
    RewriteCond %{REQUEST_URI} ^application.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]

    #Checks to see if the user is attempting to access a valid file,
    #such as an image or css document, if this isn't true it sends the
    #request to index.php
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php?/$1 [L]
    </IfModule>

    <IfModule !mod_rewrite.c>
    # If we don't have mod_rewrite installed, all 404's
    # can be sent to index.php, and everything works as normal.
    # Submitted by: ElliotHaughin

    ErrorDocument 404 /index.php
    </IfModule>

now when I add sub-domain1 and sub-domain2 I have problem with index.php. for main CI index.php is gone but for sub-domains I don't know how i can do that.

Code:

www.mydomain.com/folder1/...           ok

    www.mydomain.com/controler/function    ok

    www.sub-domain1.mydomain.com/index.php/controler/function  ok

   www.sub-domain1.mydomain.com/controler/function  NOT ok

please help me.
thanks

[eluser]Unknown[/eluser]
just put following htaccess in the sub-domain1 and sub-domain1 folders in root directory.

Code:

RewriteEngine on
RewriteCond $1 !^(index\.php|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

[eluser]Najeeb[/eluser]
Hello All,

You can say that am new in development, just want to ask what is the defrance between -root and -www, as I know that -root contains -www and inside -www locate all my folders (System and Application).

Please advaice, thanks in advance.