URL redirection to subdomain without changing URL in address - redirect

Question

I am new to Linux and want to use .htaccess or proxy for the URL redirection leaving URL unchanged with apache2.
Now i want to redirect my main domain http://example.com/test to my subdomain http://test.example.com without changing the URL in address bar.
Kindly help me in giving me some guidelines with .htaccess or proxy or some other..

Answer 1

If you don't want the URL to change you either need a Reverse proxy set-up between the two virtual hosts / domains, or if example.com is just an alias, same IP and served from the same Apache virtual host, you could use an internal rewrite. More info HERE
your can also try this. for more infor go HERE
RewriteEngine On
RewriteCond %{HTTP_HOST} ^(www\.)?domain\.com$ [NC]
RewriteRule ^/?(index.\php)?$ /category [L]
This only works for requests for http://domain.com/ or http://domain.com/index.php, and you'd get served the content at http://domain.com/category without changing the URL in the address bar. You can probably even lose the RewriteCond %{HTTP_HOST} ^(www\.)?domain\.com$ [NC] line if you don't need it.
there is also a helpful resource here
RewriteEngine on
RewriteBase /
######## example.com ########
RewriteCond %{HTTP_HOST} ^.*example.com$ [NC]
RewriteCond /www/quux-foo.com/www/root/v1%{REQUEST_URI} -d
RewriteRule ^(.*[^/])$ %{REQUEST_FILENAME}/ [L]
RewriteCond %{HTTP_HOST} ^.*quux-foo.com$ [NC]
RewriteCond %{REQUEST_URI} ^/v1/
RewriteRule ^(.*)$ - [F]
RewriteCond %{HTTP_HOST} ^.*example.com$ [NC]
RewriteCond /www/quux-foo.com/www/root/v1%{REQUEST_URI} -f [OR]
RewriteCond /www/quux-foo.com/www/root/v1%{REQUEST_URI} -d
RewriteRule ^(.*)$ v1/$1 [L]
RewriteCond %{HTTP_HOST} ^.*example.com$ [NC]
RewriteCond %{REQUEST_URI} !^/v1/
RewriteRule ^(.*)$ v1/index.php [L]
######## example.com ########