Conditional htaccess - php

Question

I just want some help with my .htaccess configuration. Before I have this problem where I need to redirect the page to
a specific url. Like if the user type http://mydomain/test it will be redirected to http://mydomain/app/r/test. I
achieved the redirection using .htaccess. The code is below
RewriteEngine on
RewriteRule (.*) http://mydomain/app/r/$1 [R=301,L]
But I have this new specification. As follows:
If user visit http://mydomain/ or http://domain/index.php, he will be
redirected to http://mydomain/mymanager
If user visit
http://mydomain/{any_segment}, he will be redirected to
http://mydomain/app/r/{any_segment}
Here is my current htaccess. Basically in the url, any characters will be redirected to /app/r/{} except index.php. But what about the http://domain/? How can I achieve this.
RewriteEngine on
RewriteCond %{HTTP_HOST} ^mydomain$ [OR]
RewriteCond %{HTTP_HOST} ^www.mydomain$
RewriteCond %{REQUEST_URI} !^/index.php
RewriteRule ^(.*)$ http://mydomain/app/r/$1 [R=301,L]
I've been playing around my htaccess and any pointers will be of great help to me.

Answer 1

These are your rules :
RewriteEngine on
RewriteCond %{HTTP_HOST} ^mydomain$ [OR]
RewriteCond %{HTTP_HOST} ^www.mydomain$
RewriteCond %{REQUEST_URI} !^/index.php
RewriteRule ^(.*)$ http://mydomain/app/r/$1 [R=301,L]
It looks like , any request should redirect to /app/r/ except A URI start with /index.php but still not doing that , in normal cases , so you should exclude the target directory from being redirect again and again by this rule RewriteRule ^(.*)$ http://mydomain/app/r/$1 [R=301,L] , ^(.*)$ means any URI start with any thing and the server will look, if there is a condition , and actually there is only one condition to exclude index.php, otherwise redirect .
So , you should exclude this target directory along with index.php like this :
RewriteCond %{REQUEST_URI} !^(/index\.php|/app/r/)
But still you want to match a request that target HOST only so,you should add that as well :
RewriteCond %{REQUEST_URI} !^(/index\.php|/app/r/|/?$)
Then you could match host with www or non-www like this :
RewriteCond %{HTTP_HOST} ^(www\.)?mydomain$
Your rules should look like this :
RewriteEngine on
RewriteCond %{HTTP_HOST} ^(www\.)?mydomain$
RewriteCond %{REQUEST_URI} !^(/index\.php|/app/r/|/?$)
RewriteRule ^(.*)$ http://mydomain/app/r/$1 [R=301,L]
Also you could summarize that more by utilizing %{REQUEST_URI} like this :
RewriteEngine on
RewriteCond %{HTTP_HOST} ^(www\.)?mydomain$
RewriteRule !^(index\.php|app/r/|/?$) http://mydomain/app/r%{REQUEST_URI} [R=301,L]
NOTE: Clear browser cache then test