Typically, the guid in the database will look something like this:

http://blog.bit-matrix.com/?p=2411

You can use this perfectly fine but it will hurt your SEO since search sites prefer descriptive links such as:

http://blog.bit-matrix.com/2010/02/10/google-buzz-a-privacy-disaster

As it turns out, you can easily construct this link from the database yourself. Wordpress will recognize the format of the link and display the appropriate post. The query to construct this is quite simple, all we need is a little date formatting:

SELECT CONCAT(DATE_FORMAT(post_date,’%Y/%m/%d/’),post_name) AS permalink FROM wp_posts WHERE post_status=’publish’;

This will return all the published post guid’s in the following format:

2010/02/10/google-buzz-a-privacy-disaster

That’s all!

In this case we want to re-direct our users and any bots to the same version of the URL (i.e. all lowercase). If you are running Apache, make sure mod_rewrite is installed and make the following changes to your configuration.

1. In your server config or virtual host file:
RewriteMap lc int:tolower

2. In your .htaccess file at the root of your site:

# Lower-case and 301 all requests
RewriteEngine On
RewriteCond %{REQUEST_URI} [A-Z]
RewriteRule ^(.*)$ /${lc:$1} [L,R=301]


Note: Beware that some standard files are mixed case and might be broken by doing this (such as AC_RunActiveContent.js).