WordPress Cleanup functions

cleanup-wordpress.php

<?php

/**
 * Cleanup version 2021.5.20
 * save to your theme and use from functions.php: 
 * require get_template_directory() . '/helpers/cleanup.php';
 */

/**
 * Disable the emoji's
 */
function cleanup_disable_emojis()
{
  remove_action('wp_head', 'print_emoji_detection_script', 7);
  remove_action('admin_print_scripts', 'print_emoji_detection_script');
  remove_action('wp_print_styles', 'print_emoji_styles');
  remove_action('admin_print_styles', 'print_emoji_styles');
  remove_filter('the_content_feed', 'wp_staticize_emoji');
  remove_filter('comment_text_rss', 'wp_staticize_emoji');
  remove_filter('wp_mail', 'wp_staticize_emoji_for_email');

  // Remove from TinyMCE
  add_filter('tiny_mce_plugins', 'disable_emojis_tinymce');
}
add_action('init', 'cleanup_disable_emojis');

/**
 * Filter out the tinymce emoji plugin.
 */
function disable_emojis_tinymce($plugins)
{
  if (is_array($plugins)) {
    return array_diff($plugins, array('wpemoji'));
  } else {
    return array();
  }
}

/**
 * Clean WP version
 */
function cleanup_remove_version()
{
  return '';
}
add_filter('the_generator', 'cleanup_remove_version');


/**
 * Remove RSD link, wlw manifest, wp_shorlink, oEmbed discovery links, rest output from wp_head
 */
remove_action('wp_head', 'rsd_link');
remove_action('wp_head', 'wlwmanifest_link');
remove_action('wp_head', 'wp_shortlink_wp_head');
remove_action('wp_head', 'wp_oembed_add_discovery_links', 10);
remove_action('wp_head', 'rest_output_link_wp_head', 10);
remove_action('template_redirect', 'rest_output_link_header', 11, 0);

/**
 * Limit WP Post revisions to 3
 */
if (!defined('WP_POST_REVISIONS')) define('WP_POST_REVISIONS', 3);

/**
 * Disbale comments.
 */
add_action('admin_init', function () {
  // Redirect any user trying to access comments page
  global $pagenow;

  if ($pagenow === 'edit-comments.php') {
    wp_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');
    }
  }
});

// Close comments on the front-end
add_filter('comments_open', '__return_false', 20, 2);
add_filter('pings_open', '__return_false', 20, 2);

// Hide existing comments
add_filter('comments_array', '__return_empty_array', 10, 2);

// Remove comments page in menu
add_action('admin_menu', function () {
  remove_menu_page('edit-comments.php');
});

// Remove comments links from admin bar
add_action('init', function () {
  if (is_admin_bar_showing()) {
    remove_action('admin_bar_menu', 'wp_admin_bar_comments_menu', 60);
  }
});