Filters whether to send the post author new comment notification emails, overriding the site setting.

Filters the user agent sent when pinging-back a URL.

Filters a comment’s approval status before it is set.

Filters the comment author’s email cookie before it is set.

Filters the comment author’s name cookie before it is set.

Filters the comment author’s URL cookie before it is set.

Filters the comment content before it is set.

Fires before a comment is posted.

Filters the comment author’s browser user agent before it is set.

Filters the comment author’s IP address before it is set.