htaccess rename file to $_GET php variable

Question

I have a page which currently displays user information based on values passed through $_GET['username']

What I currently have Is when a user goes to url.com/user/index?username=username (for example) it will display username's page. If the variable is not set however like url.com/user/index , it will display the logged in users page instead.

It works, however, that Is not what I want. How I would like it to work is; if the user goes to url.com/user/exampleuser it will display exampleuser's page and If they go to url.com/user/ it just displays the logged in user.

I am currently testing on an xampp server (localhost) and I can't seem to find anything which works how I would like it to.

Any and all help is appreciated!

EDIT

this is my new .htaccess:

Options -Indexes

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^\.]+)$ $1.php [NC,L]

RewriteRule ^user/([A-Za-z0-9-]+)$ user/index?username=$1; 

however, when I go to the page ie localhost/test/user/username it gives me object not found! error

Answer 1

RewriteEngine On

RewriteRule ^user/([A-Za-z0-9-]+)$ user/index?username=$1; 
# for particular user details

RewriteRule ^user/$ user/index; # for all logged in user list

For Eg. your url is user/index?username=testuser after rewrite apply it look like user/testuser it is for particular user details for all user list you just use user/