Sanitizes the cookies sent to the user already.

Separates an array of comments into an array keyed by comment_type.

Sends a Trackback.

Updates the comment cache of given comments.

Updates comment meta field based on comment ID.

Sends a pingback.

Validates whether this comment is allowed to be made.

Sets the last changed time for the ‘comment’ cache group.

Compares the lengths of comment data against the maximum character limits.

Checks if a comment contains disallowed characters or words.