Finds a pingback server URI based on the given URL.

Performs all enclosures.

Performs all pingbacks.

Performs all pingbacks, enclosures, trackbacks, and sends to pingback services.

Performs all trackbacks.

Performs trackbacks.

Sends pings to all of the ping site services.

Retrieves the approved comments for post $post_id.

Retrieves comment data given a comment ID or comment object.

Retrieves the total comment counts for the whole site or a single post.