Safely move my blog? - .htaccess

Question

My blog is currently located at:
example.com/blog
with posts being something like:
example.com/blog/my-post
I want to edit my htaccess file so anyone that accesses
example.com/blog/my-post
would end up at:
example.com/my-post
How can I do this with an htaccess file?
UPDATE
Right now I have:
<IfModule mod_rewrite.c>
<IfModule mod_negotiation.c>
Options -MultiViews
</IfModule>
RewriteEngine On
# www.
RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301]
</IfModule>
That will forward any non-www traffic to www. However, I need to modify this to support /blog as well. I don't think my syntax is right:
RewriteCond %{HTTP_HOST} ^example\.com/blog$ [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301]
?

Answer 1

You cannot match /blog using HOST_NAME variable.
Have your htaccess like this:
<IfModule mod_rewrite.c>
<IfModule mod_negotiation.c>
Options -MultiViews
</IfModule>
RewriteEngine On
# www.
RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [L,R=301,NE]
RewriteRule ^blog/(.*)$ /$1 [L,NC,R=301]
</IfModule>
This assumes there is no .htaccess in /blog/ directory. However if it is there for some reason then use this rule as first rule in /blog/.htaccess:
RewriteEngine On
RewriteRule ^(.*)$ /$1 [L,R=301]