Disable Comments in WordPress - Code Snippet

disable-comments.php

<?php 
// Place in functions.php
add_filter('comments_open', '__return_false', 20, 2);
add_filter('pings_open', '__return_false', 20, 2);
add_filter('comments_array', '__return_empty_array', 10, 2);
add_action('admin_init', array($this, 'remove_comments_links_from_dashboard'));
add_action('admin_menu', array($this, 'remove_comments_page_in_menu'));

function remove_comments_page_in_menu() {
  remove_menu_page('edit-comments.php');
}

function remove_comments_links_from_dashboard() {
  if (is_admin_bar_showing()) {
        remove_action('admin_bar_menu', 'wp_admin_bar_comments_menu', 60);
    }

    global $pagenow;
    if ($pagenow === 'edit-comments.php') {
        wp_safe_redirect(admin_url());
        exit;
    }

    // Remove comments metabox from dashboard
    remove_meta_box('dashboard_recent_comments', 'dashboard', 'normal');

    // Disable support for comments and trackbacks in post types
    foreach (get_post_types() as $post_type) {
        if (post_type_supports($post_type, 'comments')) {
            remove_post_type_support($post_type, 'comments');
            remove_post_type_support($post_type, 'trackbacks');
        }
    }

}