Modrewrite for subdomains using .htaccess - .htaccess

Question

I have tried the answers in this and this but always get redirection to example.com/any. I don't understand whether I should change both htaccess files or just the inner one.
I need to redirect any.example.com to example.com?subdomain=any
This is my file structure:
/folder1
/folder2
/folder3
/web/index.php
/web/.htaccess // inner htaccess
/.htaccess // outer htaccess
Outer .htaccess:
Options -Indexes
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{REQUEST_URI} !^public
RewriteRule ^(.*)$ web/$1 [L]
</IfModule>
# Deny accessing below extensions
<Files ~ "(.json|.lock|.git)">
Order allow,deny
Deny from all
</Files>
# Deny accessing dot files
RewriteRule (^\.|/\.) - [F]
Inner .htaccess:
RewriteEngine on
RewriteCond %{HTTP_HOST} !^example\.com$ [NC,OR]
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://example.com/$1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^ index.php [L]
<FilesMatch "\.(jpg|jpeg|png|gif|swf)$">
Header set Cache-Control "max-age=604800, public"
</FilesMatch>
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType application/javascript "access 1 week"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 2 days"
ExpiresByType text/x-javascript "access plus 1 month"
ExpiresByType application/javascript "access plus 1 month"
ExpiresByType application/x-javascript "access plus 1 month"
</IfModule>