hide subdomain in address bar - wordpress

Question

My main website is located on www.example.com. On the subdomain sub.example.com I'm building another website. Both websites are build with WordPress. Both domains are registred at the same registrar
I registered a domainname (lets say: www.example2.com) wich I would like to point to sub.example.com. When someone visites www.example2.com he/she should see www.example2.com in the address bar and not sub.example.com.
I was trying to get this to work with a .htaccess file and it kind of worked, but not in the way I was hoping:
when I enter example2.com the browser opens sub.example.com and in the address bar it states example2.com (so far, so good)
when I navigate to another page on the website the address bar shows sub.example.com/another-page instead of example2.com/another-page
when I enter www.example2.com the browser opens www.example.com
This is how my .htaccess file looks like at the moment:
RewriteEngine On
RewriteCond %{HTTP_HOST} example2.com$ [NC]
RewriteCond %{HTTP_HOST} www.example2.com$ [NC]
RewriteRule ^(.*)$ http://sub.example.com [R=301,L]
Can someone tell me how I can get this to work?

Answer 1

Try this and see if it works for you. Also I would make sure the www dns record for example2.com is pointing to the same location as example2.com.
RewriteEngine On
RewriteCond %{HTTP_HOST} ^(www.)?example2\.com$ [NC]
RewriteRule ^(.*)$ http://sub.example.com/$1 [L]
Edit:
Really for what you are trying to accomplish, I would suggest NameBased virtual Hosts if possible. That's what it was designed for. So that you can use the same IP for multiple sites. This change is done in the apache config file. See this simple example.
NameVirtualHost *:80
<VirtualHost *:80>
ServerName www.example.com
ServerAlias example.com *.example.com
DocumentRoot /www/example.com/html
</VirtualHost>
<VirtualHost *:80>
ServerName www.example2.com
ServerAlias example2.com
DocumentRoot /www/example.com/html/sub
</VirtualHost>
http://httpd.apache.org/docs/2.2/vhosts/name-based.html
That tells the server what document root to use for each website and therefore eliminates the need for these mod redirects and CNAMEs to sub domains.