301 Redirect domain Sub-folders to Subdomain subfolder

Question

I have a domain and subdomain example.com and music.example.com and they are both on root directory /public_html

I want to redirect example.com/music/end/ to music.example.com/music/end/but since the both of them are in root directory it is giving me redirection error.

Please is there any way i can make 301 redirection from the old url to the new one without getting errors

Answer 1

If both the main domain and subdomain point to the same directory on the filesystem, then you need to check the requested host using a mod_rewrite condition.

So, for example, the following directives should go before the WordPress front-controller (ie. before the # BEGIN WordPress section):

RewriteCond %{HTTP_HOST} ^(example\.com) [NC]
RewriteRule ^(music/end/)$ http://music.%1/$1 [R=301,L]

The use of backreferences in the RewriteRule substitution is simply to prevent repetition. %1 is a backreference to the captured group in the last matched CondPattern (ie. example.com) and $1 is a backreference to the captured group in the RewriteRule pattern (ie. music/end/).

You need to use mod_rewrite (as opposed to a mod_alias Redirect) since you most probably have existing mod_rewrite directives associated with WordPress, and there could be conflicts otherwise. Besides, you can't check the Host header using mod_alias.

You will need to clear your browser cache before testing.

UPDATE: From your comment...

RewriteRule ^ng-music/(.*) https://music.example.com/music/$1 [R=301,L]

This does something different to the "desired" redirect as stated in your question. By itself, this shouldn't result in a redirect loop.