Adds any sites from the given IDs to the cache that do not already exist in cache.

Adds any terms from the given IDs to the cache that do not already exist in cache.

Filters post thumbnail lookup to set the post thumbnail.

Filters out register_meta() args based on an allowed list.

Fires functions attached to a deprecated filter hook.

Removes a network from the object cache.

Displays the HTML email link to the author of the current comment.

Displays the HTML link of the URL of the author of the current comment.

Outputs a complete commenting form for use within a template.

Fires functions attached to a deprecated action hook.