spam_comment WordPress Action Hook
The spam_comment hook is a hook that is used to inform WordPress of a comment that has been flagged as spam. This hook is used by plugins and themes to delete or mark comments as spam.
do_action( 'spam_comment',  int $comment_id ,  WP_Comment $comment  ) #
Fires immediately before a comment is marked as Spam.
Parameters
- $comment_id
- (int)The comment ID. 
- $comment
- (WP_Comment)The comment to be marked as spam. 
Source
File: wp-includes/comment.php
Changelog
| Version | Description | 
|---|---|
| 4.9.0 | Added the $commentparameter. | 
| 2.9.0 | Introduced. |