Subdomain "m." with Wordpress and. htaccess (Conflict in the rewrite rules in the htaccess.)

Question

I do not usually in the habit of posting , because I always find my answer by searching the forums , but today I came across a real problem !

I have a Wordpress install multisite in a subdirectory of my domain. That is to say, it is at http://mondomaine.com/fr/ .

I wish to make a mobile version in a subdomain "m . " I want my mobile version is available at http://m.mondomaine.com/fr/ .

My host has created the subdomain m that points to the root of the site.

When I want to access a page from my mobile subdomain redirects it necessarily to the homepage /fr/ .

I tried to change my .htaccess , But nothing could be done , or I have a redirect loop , or I have a 404 page.

I suppose that there is a conflict between the rules , but I really tried and tested lots of solutions and I found nothing conclusive.

The original htaccess generated by Wordpress and located in the directory /fr :

RewriteEngine On

RewriteBase /fr/
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(wp-(content|admin|includes).*) $1 [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(.*\.php)$ $1 [L]
RewriteRule . index.php [L]

.htaccess that I modified:

RewriteEngine On

RewriteBase /fr/
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(wp-(content|admin|includes).*) $1 [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(.*\.php)$ $1 [L]
RewriteCond %{HTTP_HOST} !^m\.(.*) [NC]
RewriteRule . index.php [L]

RewriteCond %{HTTP_HOST} ^m\.(.*) [NC]
RewriteRule ^(.*)$ http://mondomaine.com/fr/$1 [L,P]

Thank you in advance to those who respond

Answer 1

If mod_proxy is enabled then move last m. rule right at the top, just below RewriteEngine On as this:

RewriteEngine On

RewriteCond %{HTTP_HOST} ^m\.(.+)$ [NC]
RewriteRule ^(.*)$ http://mondomaine.com/fr/$1 [L,P]