Remove all unnecessary stuff from WordPress <head> tag
| <?php | |
| /** | |
| * Alter dns-prefetch links in <head> | |
| */ | |
| add_filter('wp_resource_hints', function (array $urls, string $relation): array { | |
| // If the relation is different than dns-prefetch, leave the URLs intact | |
| if ($relation !== 'dns-prefetch') { | |
| return $urls; | |
| } | |
| // Remove s.w.org entry | |
| $urls = array_filter($urls, function (string $url): bool { | |
| return strpos($url, 's.w.org') === false; | |
| }); | |
| // List of domains to prefetch: | |
| $dnsPrefetchUrls = []; | |
| return array_merge($urls, $dnsPrefetchUrls); | |
| }, 10, 2); | |
| /** | |
| * Disable RSS feeds by redirecting their URLs to homepage | |
| */ | |
| foreach (['do_feed_rss2', 'do_feed_rss2_comments'] as $feedAction) { | |
| add_action($feedAction, function (): void { | |
| // Redirect permanently to homepage | |
| wp_redirect(home_url(), 301); | |
| exit; | |
| }, 1); | |
| } | |
| /** | |
| * Remove the feed links from <head> | |
| */ | |
| remove_action('wp_head', 'feed_links', 2); | |
| /** | |
| * Remove emoji script and styles from <head> | |
| */ | |
| remove_action('wp_head', 'print_emoji_detection_script', 7); | |
| remove_action('wp_print_styles', 'print_emoji_styles'); | |
| /** | |
| * Disable REST-API for all users except of admin | |
| */ | |
| add_filter('rest_authentication_errors', function ($access) { | |
| if (!current_user_can('administrator')) { | |
| return new WP_Error('rest_cannot_access', 'Only authenticated users can access the REST API.', ['status' => rest_authorization_required_code()]); | |
| } | |
| return $access; | |
| }); | |
| /** | |
| * Remove REST-AI link from <head> | |
| */ | |
| remove_action('wp_head', 'rest_output_link_wp_head'); | |
| /** | |
| * Disable XML-RPC | |
| */ | |
| add_filter('xmlrpc_enabled', function (): bool { | |
| return false; | |
| }); | |
| /** | |
| * Remove XML-RPC link from <head> | |
| */ | |
| remove_action('wp_head', 'rsd_link'); | |
| /** | |
| * Remove Windows Live Writer manifest from <head> | |
| */ | |
| remove_action('wp_head', 'wlwmanifest_link'); | |
| /** | |
| * Remove info about WordPress version from <head> | |
| */ | |
| remove_action('wp_head', 'wp_generator'); | |
| /** | |
| * Remove Gutenberg default styles | |
| */ | |
| add_action('wp_print_styles', function (): void { | |
| wp_dequeue_style('wp-block-library'); | |
| wp_dequeue_style('wp-block-library-theme'); | |
| }); | |
| /** | |
| * Remove unnecessary attributes from style tags | |
| */ | |
| add_filter('style_loader_tag', function (string $tag, string $handle): string { | |
| // Remove ID attribute | |
| $tag = str_replace("id='${handle}-css'", '', $tag); | |
| // Remove type attribute | |
| $tag = str_replace(" type='text/css'", '', $tag); | |
| // Change ' to " in attributes: | |
| $tag = str_replace('\'', '"', $tag); | |
| // Remove trailing slash | |
| $tag = str_replace(' />', '>', $tag); | |
| // Remove double spaces | |
| return str_replace(' ', '', $tag); | |
| }, 10, 2); |
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