WordPress relies on wp-config.php file to connect to database. Here, there are some basic settings about our WordPress installation like database-related information and language interface. When we upgrade our WordPress installation to new release, we can have our WordPress blog running without problem, even without touching wp-config.php file.
But, in some release, there are some new settings that should be — well, I’d rather say ‘recommended’ — added. For example, WordPress 2.5 introduced a new setting called SECRET_KEY. Read more about this new at Ryan Boren’s blog or WordPress Codex.
Do you have those setting in your wp-config.php? If not, it’s time to add it.
For the next release, there will be another new settings that can be added. So far, there will be WP_POST_REVISIONS. It’s related to Post Revisions feature that will be introduced in WordPress 2.6. Since I have taken the decision not to use that feature, I will turn this feature off for my coming upgrade. So, right now — I’m still using WordPress 2.5.1 — I added a setting to disable Post Revisions feature in my wp-config.php.
It’s always a good idea to have wp-config.php has the recommended settings, according to WordPress version we’re using. It’s never too late to fix your configuration file.