Subdomain route to subfolder with htaccess on wordpress - wordpress

Question

I am trying to create a subdomain sub.domain.com that displays domain.com/sub without changing the address bar.
I've come up with the following .htaccess rule based on other questions made here:
RewriteCond %{HTTP_HOST} ^sub\.domain\.com$ [NC]
RewriteRule ^((?!sub/).*)$ /sub/$1 [L,NC]
The problem is I'm using a WordPress instance and my .htaccess currently looks like this now:
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
RewriteCond %{HTTP_HOST} ^sub\.domain\.com$ [NC]
RewriteRule ^((?!sub/).*)$ /sub/$1 [L,NC]
But when I browse sub.domain.com I'm being redirected to my homepage (domain.com) from WordPress. How can I do this correctly?
Tried to change it to:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^sub\.domain\.com$ [NC]
RewriteRule ^((?!sub/).*)$ /sub/$1 [NC]
# BEGIN WordPress
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
# END WordPress
</IfModule>
But it is still not working

Answer 1

You have to create a virtual host in apache config.
<VirtualHost *:80>
ServerName sub.domain.com
DocumentRoot /var/www/sub
</VirtualHost>
Or VirtualDocumentRoot if mod_vhosts_alias is enabled.
<VirtualHost *:80>
ServerName sub.domain.com
ServerAlias *.domain.com
VirtualDocumentRoot /var/www/%1
</VirtualHost>
In above I am pointing it to /sub directory if it exists. After all changes restart the server.

Answer 2

You can add below line of code in your wp-config.php files
define('WP_HOME','http://sub.domain.com');
define('WP_SITEURL','http://sub.domain.com');