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

过滤器：：为当前注释过滤返回的CSS类。
Filter Hook: Filters the returned CSS classes for the current comment.

目录锚点：#参数#源码

---

参数（Parameters）

源码（Source）

/**
 * Generates semantic classes for each comment element.
 *
 * @since 2.7.0
 *
 * @param string|array $class      Optional. One or more classes to add to the class list.
 *                                 Default empty.
 * @param int          $comment_id Comment ID. Default current comment.
 * @param int|WP_Post  $post_id    Post ID or WP_Post object. Default current post.
 * @param bool         $echo       Optional. Whether to cho or return the output.
 *                                 Default true.
 * @return string|void
 */
function comment_class( $class = '', $comment_id = null, $post_id = null, $echo = true ) {
	// Separates classes with a single space, collates classes for comment DIV
	$class = 'class="' . join( ' ', get_comment_class( $class, $comment_id, $post_id ) ) . '"';
	if ( $echo)
		echo $class;
	else
		return $class;
}