problem in htaccess file

[sunil_23413]

Hello

here is my site http://mygradregistry.com.

 

when user goes to link "http://mygradregistry.com/profile.php"

then it should look like "http://mygradregistry.com/username" showing the content of profile.php

i have username in my session variable.

 

[RussellReal]

RewriteRule ^/([a-z0-9]+)$ profile.php?username=$1

[sunil_23413]

Hello

here is my site http://mygradregistry.com.

 

when user goes to link "http://mygradregistry.com/profile.php"

then it should look like "http://mygradregistry.com/username" showing the content of profile.php

i have username in my session variable.$_SESSION['user_id']

 

i am new to .htaccess so please give me brief explanation, Thanks