htaccess query string with QSA

Question

I am trying to set common rule in htaccess for removing .php extension and links using different query strings like

domainname.com/welcome.php?user=normal&type=free&uid=100
domainname.com/welcome.php?user=normal
domainname.com/welcome.php?log=new&theme=red

And expected links like

domainname.com/welcome?user=normal&type=free&uid=100
domainname.com/welcome?user=normal
domainname.com/welcome?log=new&theme=red

Rule set in htaccess file like:

RewriteCond %{QUERY_STRING} ^(.*)$
RewriteRule ^(.*)/welcome/$ $1/welcome.php? [QSA,NC,L]

But some how not working. Am I doing something wrong.

Answer 1

Try this in the .htaccess file at root directory:

Options +FollowSymlinks -MultiViews
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_URI}  !welcome\.php [NC]
RewriteRule ^welcome/?  /welcome.php      [NC,L]

The query string will be passed automatically.

Answer 2

Your rule sets in your answer and in your comment are disordered. If you want /$dynamic to be rewritten into /$dynamic.php with a query string, you must try this code:

Options+ FollowSymlinks
RewriteEngine on

RewriteCond %{REQUEST_URI} ^/([a-z0-9-_]+)/?$
RewriteRule ^(.*) /%1.php [QSA]

Even /index1, /index2, /index3, /etc will be rewritten.