/ public_html
    / .htaccess
    / index.php
    / app.example.com
        / dashboard.php

# --------------------------------------------------------------------------------------------------------------------------------------
# Stops people from being able to see htaccess file

<Files .htaccess>
order allow,deny
deny from all
</Files>

# --------------------------------------------------------------------------------------------------------------------------------------
# Options

Options All -Indexes +MultiViews

# --------------------------------------------------------------------------------------------------------------------------------------
# Redirect app.example.com to /dashboard

RewriteEngine On

RewriteCond %{HTTP_HOST} ^app.example.com [NC]
RewriteRule ^(.*)$ http://app.example.com/dashboard/$1 [L,R=301]

# --------------------------------------------------------------------------------------------------------------------------------------
# Makes it so url can have slash at the end instead of .php extension

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{DOCUMENT_ROOT}/$1.php -f
RewriteRule ^(.+?)/?$ $1.php [L]

# --------------------------------------------------------------------------------------------------------------------------------------
# Adds wwww to url if it doesnt already have it

RewriteCond %{HTTP_HOST} ^example.com [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301,NC]