How do I achieve a url like www.example.com/username to redirect to www.example.com/user/profile.php?uid=10?
snippet in htaccess

How do I achieve a url like www.example.com/username to redirect to www.example.com/user/profile.php?uid=10?

user8561

Options +FollowSymLinks -MultiViews
# Turn mod_rewrite on
RewriteEngine On
RewriteBase /

# If the request is for a valid directory
RewriteCond %{REQUEST_FILENAME} -d
# If the request is for a valid file
RewriteCond %{REQUEST_FILENAME} -f
# If the request is for a valid link
RewriteCond %{REQUEST_FILENAME} -l
# do not do anything
RewriteRule ^ - [L]

# forward /blog/foo to blog.php/foo
RewriteRule ^blog/(.+)$ blog.php/$1 [L,NC]

# forward /john to user_page/profile.php?name=john
RewriteRule ^((?!blog/).+)$ user_page/profile.php?name=$1 [L,QSA,NC]