WordPress 3.0 will separately identify the Drop-ins that you add to your installation. WordPress Drop-ins are custom PHP files related to several WordPress core files such as advanced-cache.php or object-cache.php that you can load on WP-Content to override the core file with new functionality.
The image to the left is located on a WordPress Trac ticket, and shows how WordPress 3.0 will display Drop-ins. Memcached is one of the plugins displayed on the image, which overrides WordPress’ own object-cache-php file. Check also this article about replacing WordPress Object Caching.
new information for me thanks
thanks i will adapt to my website.
What is this thing which is “inactive” under my drop-ins?
advanced-cache.php
Advanced caching plugin. Inactive: Requires define(‘WP_CACHE’, true); in wp-config.php.
The file wp-config.php is located in the root of your WordPress installation. You can edit it and set the constant to true. Here’s a document from wordpress.org about Editing wp-config.php where the WP_CACHE constant is defined.
This article is good and useful. It will be complete and perfect, if you could list all the drop-ins available in wordpress.
One more thing that, your site looks very nice and cool.