Function: Determines whether the current admin page is generated by a plugin.

Function: Update the categories cache.

Function: Retrieve user data based on field.

Function: Retrieve the URL to the home page of the author of the current post.

Function: Retrieve the ID of the author of the current post.

Function: Retrieve the email of the author of the current post.

Function: Retrieve the ICQ number of the author of the current post.

Function: Retrieve the Yahoo! IM name of the author of the current post.

Function: Retrieve the MSN address of the author of the current post.

Function: Retrieve the AIM address of the author of the current post.