Q:

How to hide page path - htaccess.conf

My php web app url structure is: 

www.MyDomain.com/SubFolder_A/SubFolder_B/master.php

I'd hide the master.php path.
Here a portion of my htaccess.conf file: 
<IfModule mod_rewrite.c>
  RewriteCond %{HTTPS} !=on
  RewriteCond %{HTTP_HOST} !^www\..+$ [NC]
  RewriteRule ^ http://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</IfModule>

How could I edit it, to hide my server directory structure? 

A:

Per Marc B's comment, simply create an .htaccess file in SubFolder_B and add the following line:
DirectoryIndex master.php

When you request mydomain.com/SubFolder_A/SubFolder_B/, master.php will load by default.

