Core Function

comment_class()

 comment_class(
mixed $css_class = '',
    mixed $comment = null,
    mixed $post = null,
    mixed $display = true
)

Generates semantic classes for each comment element.

Parameters 4 required

Name / Type	Description
mixed	(string \| string[]) $css_class Optional. One or more classes to add to the class list. Default empty. Required
(int	\| WP_Comment) $comment Optional. Comment ID or WP_Comment object. Default current comment. Required
(int	\| WP_Post) $post Optional. Post ID or WP_Post object. Default current post. Required
bool	$display Optional. Whether to print or return the output. Default true. Required

((void)

| string) Void if `$display` argument is true, comment classes if `$display` is false.

Since Version

2.7.0

Source File

wp-includes/comment-template.php