redirect to https://my-site/wp-admin/ instead of https://my-site/wordpress/wp-admin/ after options updating

by

The solution was :

  1. not use the index.php to include the folder /wordpress/
  2. not use wordpress/.htaccess

  3. use only .htaccess to point to subfolder

    <IfModule mod_rewrite.c> 
    RewriteEngine On 
    #https
    RewriteCond %{HTTPS} off 
    RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301] 
    RewriteCond %{HTTP_HOST} ^(www.)?my-site.com$ 
    #point to subfolder
    RewriteCond %{REQUEST_URI} !^/wordpress/ 
    RewriteCond %{REQUEST_FILENAME} !-f 
    RewriteCond %{REQUEST_FILENAME} !-d 
    RewriteRule ^(.*)$ /wordpress/$1 
    RewriteCond %{HTTP_HOST} ^(www.)?my-site.com$ 
    RewriteRule ^(/)?$ wordpress/index.php [L] 
</IfModule>