WordPress ~ Remove unnecessary details in body_class function - #frontend #security #optimisation

functions.php

<?php

/**
 * Remove unnecessary details from `body_class()`
 *
 * @param string $classes
 * @param string $class
 *
 * @uses get_query_var()
 * @uses get_user_by()
 * @uses get_userdata()
 * @uses is_author()
 * @uses sanitize_html_class()
 * @uses get_queried_object()
 * @uses get_queried_object_id()
 */
add_filter('body_class', '_cw_clean_body_class', 10, 2);
function _cw_clean_body_class($classes, $class)
{
    // Remove CSS classes generated by WordPress on authors pages
    if (isset($classes['author'])) {
        // Get author
        if (!$name = get_query_var('author_name')) {
            $author = get_userdata(get_query_var('author'));
        } else {
            $author = get_user_by('slug', $name);
        }

        // Get data to remove
        $removed[] = 'author-'.$author->ID;
        $removed[] = 'author-'.$author->user_nicename;

        // Remove classes
        $classes = array_diff($classes, $removed);
    }

    // Remove CSS classes generated by WordPress on single pages
    if (isset($classes['single'])) {
        // Get post details
        $post = get_queried_object();
        $pid = get_queried_object_id();

        // Check post type
        if (isset($post->post_type)) {
            $removed[] = 'single-'.sanitize_html_class($post->post_type, $pid);
            $removed[] = 'postid-'.$pid;

            // Remove classes
            $classes = array_diff($classes, $removed);
        }
    }

    // Remove CSS classes generated by WordPress on categories / tags / tax
    if (isset($classes['category']) || isset($classes['tag']) || isset($classes['tax'])) {
        // Get object details
        $obj = get_queried_object();

        // Check object ID
        if (isset($obj->term_id)) {
            // Get class
            $obj_class = sanitize_html_class($obj->slug, $obj->term_id);
            $obj_class = is_numeric($obj_class) || !trim($obj_class, '-') ? 
                $obj->term_id : 
                $obj_class;

            // Remove details
            if (isset($classes['category'])) {
                $removed[] = 'category-'.$obj_class;
                $removed[] = 'category-'.$obj->term_id;
            } else if (isset($classes['tag'])) {
                $removed[] = 'tag-'.$obj_class;
                $removed[] = 'tag-'.$obj->term_id;
            } else if (isset($classes['tax'])) {
                $removed[] = 'tax-'.sanitize_html_class($obj->taxonomy);
                $removed[] = 'term-'.$obj_class;
                $removed[] = 'term-'.$obj->term_id;
            }

            // Remove classes
            $classes = array_diff($classes, $removed);
        }
    }

    // Return all classes
    return array_merge($classes, (array)$class);
}