Function: Retrieve the last name of the author of the current post.

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

Function: Retrieve category children list separated before and after the term IDs.

Function: Retrieves all category IDs.

Function: Print RSS comment feed link.

Function: Print/Return link to category RSS2 feed.

Function: Print/Return link to author RSS feed.

Function: Return link to the post RSS feed.