Drupal và sub-domain

#
# Apache/PHP/Drupal settings:
#
 
# Protect files and directories from prying eyes.
<FilesMatch "\.(engine|inc|info|install|module|profile|po|sh|.*sql|theme|tpl(\.php)?|xtmpl)$|^(code-style\.pl|Entries.*|Repository|Root|Tag|Template)$">
  Order allow,deny
</FilesMatch>
 
# Don't show directory listings for URLs which map to a directory.
Options -Indexes
 
# Follow symbolic links in this directory.
Options +FollowSymLinks
 
# Customized <a href="/taxonomy/term/162" title="">Error</a> messages.
ErrorDocument 404 /index.php
 
# Set the default handler.
DirectoryIndex index.php
 
# Override <a href="/category/t%E1%BA%A1p-ghi/php.html" title="">php</a> settings. More in sites/default/settings.php
# but the following cannot be changed at runtime.
 
# <a href="/category/t%E1%BA%A1p-ghi/php.html" title="">php</a> 5, <a href="/category/ph%C3%A2n-lu%E1%BB%93ng/apache.html" title="">Apache</a> 1 and 2.
<IfModule mod_php5.c>
  php_value magic_quotes_gpc                0
  php_value register_globals                0
  php_value session.auto_start              0
  php_value mbstring.http_input             pass
  php_value mbstring.http_output            pass
  php_value mbstring.encoding_translation   0
</IfModule>
 
# Requires mod_expires to be enabled.
<IfModule mod_expires.c>
  # Enable expirations.
  ExpiresActive On
  # <a href="/taxonomy/term/159" title="">cache</a> all files for 2 weeks after access (A).
  ExpiresDefault A1209600
  # Do not <a href="/taxonomy/term/159" title="">cache</a> dynamically generated pages.
  ExpiresByType text/html A1
</IfModule>
 
# Various rewrite rules.
<IfModule mod_rewrite.c>
  RewriteEngine on
 
  # If your site can be accessed both with and without the 'www.' prefix, you
  # can use one of the following settings to redirect users to your preferred
  # URL, either WITH or WITHOUT the 'www.' prefix. Choose ONLY one option:
  #
  # To redirect all users to access the site WITH the 'www.' prefix,
  # (http://example.com/... will be redirected to http://www.example.com/...)
  # adapt and uncomment the following:
  RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
  RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301]
  #
  # To redirect all users to access the site WITHOUT the 'www.' prefix,
  # (http://www.example.com/... will be redirected to http://example.com/...)
  # uncomment and adapt the following:
  # RewriteCond %{HTTP_HOST} ^www\.example\.com$ [NC]
  # RewriteRule ^(.*)$ http://example.com/$1 [L,R=301]
 
  # Modify the RewriteBase if you are using <a href="/category/ph%C3%A2n-lu%E1%BB%93ng/drupal.html" title="">drupal</a> in a subdirectory or in a
  # VirtualDocumentRoot and the rewrite rules are not working properly.
  # For example if your site is at http://example.com/drupal uncomment and
  # modify the following line:
  # RewriteBase /drupal
  #
  # If your site is running in a VirtualDocumentRoot at http://example.com/,
  # uncomment the following line:
  # RewriteBase /
 
  # Rewrite old-style URLs of the <a href="/taxonomy/term/229" title="">form</a> 'node.php?id=x'.
  #RewriteCond %{REQUEST_FILENAME} !-f
  #RewriteCond %{REQUEST_FILENAME} !-d
  #RewriteCond %{QUERY_STRING} ^id=([^&]+)$
  #RewriteRule node.php index.php?q=node/view/%1 [L]
 
  # Rewrite old-style URLs of the <a href="/taxonomy/term/229" title="">form</a> 'module.php?mod=x'.
  #RewriteCond %{REQUEST_FILENAME} !-f
  #RewriteCond %{REQUEST_FILENAME} !-d
  #RewriteCond %{QUERY_STRING} ^mod=([^&]+)$
  #RewriteRule module.php index.php?q=%1 [L]
 
  # Rewrite current-style URLs of the <a href="/taxonomy/term/229" title="">form</a> 'index.php?q=x'.
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_URI} ^/.+$
  RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]
 
  # Rewrite subdomain.example.com to example.com/index.php?q=subdomain
  RewriteCond %{REQUEST_URI} ^/$
  RewriteCond %{HTTP_HOST} ^(.+)\.example\.com$ [NC]
  RewriteRule ^.*$ index.php?q=%1 [L,QSA]
</IfModule>
 
# $Id: .htaccess,v 1.81.2.4 2008/01/22 09:01:39 drumm Exp $

<IfModule mod_rewrite.c>
  RewriteEngine on
 
  # Rewrite current-style URLs of the <a href="/taxonomy/term/229" title="">form</a> 'index.php?q=x'.
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_URI} ^/.+$
  RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]
 
  ###
  # Rewrite subdomain.example.com to example.com/index.php?q=subdomain
  ###
 
  ## Only rewrite on root level:
  ### true: foo.example.com
  ### false: foo.example.com/bar
    RewriteCond %{REQUEST_URI} ^/$
 
  ## is not www.example.com
    RewriteCond %{HTTP_HOST} !^(www\.){,1}([^\.]+\.(com|info|net|org))$ [NC]
 
  ## is something.example.com
    RewriteCond %{HTTP_HOST} ^([^\.]+)\.([^\.]+)\.(com|info|net|org)$ [NC]
 
  ## rewrite to example.com/index.php?q=something
    RewriteRule ^.*$ index.php?q=%1 [L,QSA]
 
</IfModule>