title: remove index.php of codeigniter subdomains
body: <p>this is my directory:</p>
  
  <pre><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
  </code></pre>
  
  <p>in my  application/config/config.php  is:</p>
  
  <pre><code>$config['index_page'] = "";
  </code></pre>
  
  <p>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.</p>
  
  <pre><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]
  &lt;/IfModule&gt;
  
  &lt;IfModule !mod_rewrite.c&gt;
  # 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
  &lt;/IfModule&gt; 
  </code></pre>
  
  <p>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.</p>
  
  <pre><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
  </code></pre>
  
  <p>please help me. 
  thanks</p>