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apply_filters( 'comment_class', string[] $classes, string $class, int $comment_id, WP_Comment $comment, int|WP_Post $post_id )

Filters the returned CSS classes for the current comment.

$classes: (string[]) An array of comment classes.
$class: (string) A comma-separated list of additional classes added to the list.
$comment_id: (int) The comment ID.
$comment: (WP_Comment) The comment object.
$post_id: (int|WP_Post) The post ID or WP_Post object.

Used By	Description
wp-includes/comment-template.php: get_comment_class()	Returns the classes for the comment div as an array.

Version	Description
2.7.0	Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/comment_class