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headache.php
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<?php
/**
* Copyright (c) Vincent Klaiber
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @see https://github.com/vinkla/headache
*/
/*
* Plugin Name: Headache
* Description: An easy-to-swallow painkiller plugin for WordPress.
* Author: Vincent Klaiber
* Author URI: https://github.com/vinkla
* Version: 3.5.0
* Plugin URI: https://github.com/vinkla/headache
* GitHub Plugin URI: vinkla/headache
*/
declare(strict_types=1);
namespace Headache;
use Ramsey\Uuid\Uuid;
// Redirects all feeds to home page.
function disable_feeds(): void
{
wp_redirect(home_url());
exit;
}
// Disable feeds.
add_action('do_feed', __NAMESPACE__ . '\\disable_feeds', 1);
add_action('do_feed_rdf', __NAMESPACE__ . '\\disable_feeds', 1);
add_action('do_feed_rss', __NAMESPACE__ . '\\disable_feeds', 1);
add_action('do_feed_rss2', __NAMESPACE__ . '\\disable_feeds', 1);
add_action('do_feed_atom', __NAMESPACE__ . '\\disable_feeds', 1);
// Disable comments feeds.
add_action('do_feed_rss2_comments', __NAMESPACE__ . '\\disable_feeds', 1);
add_action('do_feed_atom_comments', __NAMESPACE__ . '\\disable_feeds', 1);
// Disable comments.
add_filter('comments_open', '__return_false');
// Remove language dropdown on login screen.
add_filter('login_display_language_dropdown', '__return_false');
// Disable XML RPC for security.
add_filter('xmlrpc_enabled', '__return_false');
add_filter('xmlrpc_methods', '__return_false');
// Remove WordPress version.
remove_action('wp_head', 'wp_generator');
// Remove generated icons.
remove_action('wp_head', 'wp_site_icon', 99);
// Remove shortlink tag from <head>.
remove_action('wp_head', 'wp_shortlink_wp_head', 10);
// Remove shortlink tag from HTML headers.
remove_action('template_redirect', 'wp_shortlink_header', 11);
// Remove Really Simple Discovery link.
remove_action('wp_head', 'rsd_link');
// Remove RSS feed links.
remove_action('wp_head', 'feed_links', 2);
// Remove all extra RSS feed links.
remove_action('wp_head', 'feed_links_extra', 3);
// Remove wlwmanifest.xml.
remove_action('wp_head', 'wlwmanifest_link');
// Remove meta rel=dns-prefetch href=//s.w.org
remove_action('wp_head', 'wp_resource_hints', 2);
// Remove relational links for the posts.
remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10);
// Remove REST API link tag from <head>.
remove_action('wp_head', 'rest_output_link_wp_head', 10);
// Remove REST API link tag from HTML headers.
remove_action('template_redirect', 'rest_output_link_header', 11);
// Remove emojis.
// WordPress 6.4 deprecated the use of print_emoji_styles() function, but it has
// been retained for backward compatibility purposes.
// https://make.wordpress.org/core/2023/10/17/replacing-hard-coded-style-tags-with-wp_add_inline_style/
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 oEmbeds.
remove_action('wp_head', 'wp_oembed_add_discovery_links', 10);
remove_action('wp_head', 'wp_oembed_add_host_js');
// Disable default users API endpoints for security.
// https://www.wp-tweaks.com/hackers-can-find-your-wordpress-username/
function disable_rest_endpoints(array $endpoints): array
{
if (!is_user_logged_in()) {
if (isset($endpoints['/wp/v2/users'])) {
unset($endpoints['/wp/v2/users']);
}
if (isset($endpoints['/wp/v2/users/(?P<id>[\d]+)'])) {
unset($endpoints['/wp/v2/users/(?P<id>[\d]+)']);
}
}
return $endpoints;
}
add_filter('rest_endpoints', __NAMESPACE__ . '\\disable_rest_endpoints');
// Remove JPEG compression.
function remove_jpeg_compression(): int
{
return 100;
}
add_filter('jpeg_quality', __NAMESPACE__ . '\\remove_jpeg_compression', 10, 2);
// Update login page image link URL.
function login_url(): string
{
return home_url();
}
add_filter('login_headerurl', __NAMESPACE__ . '\\login_url');
// Update login page link title.
function login_title(): string
{
return get_bloginfo('name');
}
add_filter('login_headertext', __NAMESPACE__ . '\\login_title');
// Remove Gutenberg's front-end block styles.
function remove_block_styles(): void
{
wp_deregister_style('wp-block-library');
wp_deregister_style('wp-block-library-theme');
}
add_action('wp_enqueue_scripts', __NAMESPACE__ . '\\remove_block_styles');
// Remove core block styles.
// https://github.com/WordPress/gutenberg/issues/56065
function remove_core_block_styles(): void
{
wp_dequeue_style('core-block-supports');
}
add_action('wp_footer', __NAMESPACE__ . '\\remove_core_block_styles');
// Remove Gutenberg's global styles.
// https://github.com/WordPress/gutenberg/pull/34334#issuecomment-911531705
function remove_global_styles(): void
{
wp_dequeue_style('global-styles');
}
add_action('wp_enqueue_scripts', __NAMESPACE__ . '\\remove_global_styles');
// Remove classic theme styles.
// https://github.com/WordPress/WordPress/commit/143fd4c1f71fe7d5f6bd7b64c491d9644d861355
function remove_classic_theme_styles(): void
{
wp_dequeue_style('classic-theme-styles');
}
add_action('wp_enqueue_scripts', __NAMESPACE__ . '\\remove_classic_theme_styles');
// Remove the SVG Filters that are mostly if not only used in Full Site Editing/Gutenberg
// Detailed discussion at: https://github.com/WordPress/gutenberg/issues/36834
function remove_svg_filters(): void
{
remove_action('wp_body_open', 'gutenberg_global_styles_render_svg_filters');
remove_action('wp_body_open', 'wp_global_styles_render_svg_filters');
}
add_action('init', __NAMESPACE__ . '\\remove_svg_filters');
// Remove ?ver= query from styles and scripts.
function remove_script_version(string $url): string
{
if (is_admin()) {
return $url;
}
if ($url) {
return esc_url(remove_query_arg('ver', $url));
}
return $url;
}
add_filter('script_loader_src', __NAMESPACE__ . '\\remove_script_version', 15, 1);
add_filter('style_loader_src', __NAMESPACE__ . '\\remove_script_version', 15, 1);
// Remove contributor, subscriber and author roles.
function remove_roles(): void
{
remove_role('author');
remove_role('contributor');
remove_role('subscriber');
}
add_action('init', __NAMESPACE__ . '\\remove_roles');
// Disable attachment template loading and redirect to 404.
// WordPress 6.4 introduced an update to disable attachment pages, but this
// implementation is not as robust as the current one.
// https://github.com/joppuyo/disable-media-pages/issues/41
// https://make.wordpress.org/core/2023/10/16/changes-to-attachment-pages/
function attachment_redirect_not_found(): void
{
if (is_attachment()) {
global $wp_query;
$wp_query->set_404();
status_header(404);
nocache_headers();
}
}
add_filter('template_redirect', __NAMESPACE__ . '\\attachment_redirect_not_found');
// Disable attachment canonical redirect links.
function disable_attachment_canonical_redirect_url(string $url): string
{
attachment_redirect_not_found();
return $url;
}
add_filter('redirect_canonical', __NAMESPACE__ . '\\disable_attachment_canonical_redirect_url', 0, 1);
// Disable attachment links.
function disable_attachment_link(string $url, int $id): string
{
if ($attachment_url = wp_get_attachment_url($id)) {
return $attachment_url;
}
return $url;
}
add_filter('attachment_link', __NAMESPACE__ . '\\disable_attachment_link', 10, 2);
// Randomize attachment slugs using UUIDs to avoid slug reservation.
function disable_attachment_slug_reservation(string $slug, string $id, string $status, string $type): string
{
if ($type !== 'attachment') {
return $slug;
}
if (preg_match('/^[\da-f]{8}-[\da-f]{4}-[\da-f]{4}-[\da-f]{4}-[\da-f]{12}$/iD', $slug) > 0) {
return $slug;
}
return (string) Uuid::uuid4();
}
add_filter('wp_unique_post_slug', __NAMESPACE__ . '\\disable_attachment_slug_reservation', 10, 4);
// Discourage search engines from indexing in non-production environments.
function disable_indexing()
{
return wp_get_environment_type() === 'production' ? 1 : 0;
}
add_action('pre_option_blog_public', __NAMESPACE__ . '\\disable_indexing');
// Sanitize HTML content when pasting in TinyMCE editor.
function sanitize_tiny_mce_html_content(array $config): array
{
$config['paste_preprocess'] = "function(plugin, args) {
// Allow specific HTML tags while sanitizing the content
const allowedTags = new Set(['h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'p', 'ol', 'ul', 'li', 'a']);
const sanitizedContent = document.createElement('div');
sanitizedContent.innerHTML = args.content;
// Remove elements not in the allowed tags
sanitizedContent.querySelectorAll('*').forEach(element => {
if (!allowedTags.has(element.tagName.toLowerCase())) {
element.replaceWith(...element.childNodes); // Replace with child nodes
}
});
// Strip class and id attributes
sanitizedContent.querySelectorAll('*').forEach(element => {
element.removeAttribute('id');
element.removeAttribute('class');
});
// Return the clean HTML
args.content = sanitizedContent.innerHTML;
}";
return $config;
}
add_filter('tiny_mce_before_init', __NAMESPACE__ . '\\sanitize_tiny_mce_html_content');
// Disable the font library.
// https://developer.wordpress.org/news/snippets/how-to-disable-the-font-library/
function disable_font_library(array $settings): array
{
$settings['fontLibraryEnabled'] = false;
return $settings;
}
add_filter('block_editor_settings_all', __NAMESPACE__ . '\\disable_font_library');