Dynamic virtual hosts on Apache

This virtual host configuration will automatically choose a directory for the site's document root based on the domain name.

  1. Set up a virtual host:
    <VirtualHost _default_:80>
      RewriteEngine on
      # Remove "www." from domain names by redirecting.
      RewriteCond %{HTTP_HOST} ^www\.
      RewriteRule ^(.*) %{HTTP_HOST}`$1  [C]
      RewriteRule ^www\.([^\_]*)\`(.*)$ http://$1$2 [R=301,L]
      # Use components of the domain to determine the document root.
      # %0 is the whole domain.
      # %1 is the first part (using dotted delimiters).
      # %-2 is the second to last part.
      ServerAlias *.example.com
      UseCanonicalName Off
      VirtualDocumentRoot /var/www/html/workspace/%1/htdocs
  2. Add this to the .htaccess file configuring the application:
    RewriteBase /