Redirect wildcard subdomains to subdirectory, without changing URL in address bar

Question

I\'ve read a lot of questions and answers about this on here but none that seem to solve my specific problem.

I want to redirect any subdomain to the subdirectory to

Answer 1

I named the subdirectories under $_SERVER['DOCUMENT_ROOT'] match with my subdomains like so:

/
 var/
     www/
         html/
              .htaccess
              subdomain1.domain.com/
              subdomain2.domain.com/
              subdomain3.domain.com/

Where /var/www/html stand as 'DOCUMENT_ROOT'. Then put following code in the .htaccess file:

RewriteEngine on
RewriteCond %{REQUEST_URI} !^/%{HTTP_HOST}/
RewriteRule (.*) /%{HTTP_HOST}/$1 [L]

It works as redirect wildcard subdomains to subdirectories, without changing URL in address bar.

Beside of vhost, you may also put the subdirectories outside root and access it using alias as described here. Then put the same .htaccess code in that location.