<?php
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if (!defined('ABSPATH')) {
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exit; // Exit if accessed directly
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}
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/**
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* WordPress Cleanup and Optimization Functions
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*
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* Removes unnecessary WordPress features, optimizes performance,
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* and improves security by removing potential attack vectors.
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*/
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/*******************************************************************************
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BLOCK EDITOR & STYLES CLEANUP
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*******************************************************************************/
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/**
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* Remove WordPress block editor styles and scripts
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* Cleans up unnecessary block-related assets for custom themes
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*/
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function jvbRemoveBlockAssets(): void
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{
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if (is_admin()) {
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return;
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}
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// Remove global WordPress styles
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$global_styles = [
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'global-styles',
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'classic-theme-styles',
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'core-block-supports',
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'dashicons',
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'common',
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'wp-block-library',
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'wp-block-library-theme',
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'wp-block-styles',
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'block-style-variation-styles'
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];
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foreach ($global_styles as $style) {
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wp_dequeue_style($style);
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wp_deregister_style($style);
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}
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// Remove all block-specific styles
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global $wp_styles;
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foreach ($wp_styles->queue as $handle) {
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if (str_starts_with($handle, 'wp-block-')) {
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wp_dequeue_style($handle);
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wp_deregister_style($style);
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}
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}
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// Remove block-specific scripts and modules
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if (!is_admin()) {
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wp_deregister_script('heartbeat');
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}
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wp_dequeue_script('wp-block-template-skip-link');
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// Remove WordPress 6.5+ script modules
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wp_dequeue_script_module('@wordpress/interactivity');
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wp_deregister_script_module('@wordpress/interactivity');
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wp_dequeue_script_module('@wordpress/block-library/navigation/view');
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wp_deregister_script_module('@wordpress/block-library/navigation/view');
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// Remove block template skip link
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remove_action('wp_footer', 'the_block_template_skip_link');
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// Remove third-party styles
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wp_deregister_style('akismet-widget-style-inline-css');
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}
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add_action('wp_enqueue_scripts', 'jvbRemoveBlockAssets', 9999);
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/*******************************************************************************
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WORDPRESS HEAD CLEANUP
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*******************************************************************************/
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/**
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* Remove unnecessary WordPress head elements
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* Cleans up HTML head for better performance and security
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*/
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function jvbCleanWordPressHead(): void
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{
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// Remove version info and meta tags
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remove_action('wp_head', 'wp_generator');
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remove_action('wp_head', 'rsd_link');
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remove_action('wp_head', 'wlwmanifest_link');
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remove_action('wp_head', 'wp_shortlink_wp_head');
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// Remove emoji support
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remove_action('wp_head', 'print_emoji_detection_script', 7);
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remove_action('wp_print_styles', 'print_emoji_styles');
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// Remove REST API and oEmbed discovery links
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remove_action('wp_head', 'rest_output_link_wp_head');
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remove_action('template_redirect', 'rest_output_link_header', 11);
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remove_action('wp_head', 'wp_oembed_add_discovery_links');
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remove_action('wp_head', 'wp_oembed_add_host_js');
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}
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add_action('init', 'jvbCleanWordPressHead');
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/*******************************************************************************
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SECURITY OPTIMIZATIONS
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*******************************************************************************/
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/**
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* Apply security hardening measures
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* Removes version info, disables XML-RPC, and hardens WordPress
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*/
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function jvbSecurityOptimizations(): void
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{
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// Hide WordPress version from scripts and styles
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add_filter('style_loader_src', 'jvbRemoveVersionFromUrl', 9999);
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add_filter('script_loader_src', 'jvbRemoveVersionFromUrl', 9999);
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// Disable XML-RPC (often targeted by attackers)
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add_filter('xmlrpc_enabled', '__return_false');
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// Remove security headers that reveal info
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add_filter('wp_headers', 'jvbRemovePingbackHeader');
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// Remove WordPress version from admin footer
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add_filter('update_footer', '__return_empty_string', 11);
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// Block user enumeration
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add_action('init', 'jvbBlockUserEnumeration');
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add_filter('rest_endpoints', 'jvbDisableUserEndpoints');
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add_filter('author_rewrite_rules', '__return_empty_array');
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// Disable file editing in admin (if not already set)
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if (!defined('DISALLOW_FILE_EDIT')) {
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define('DISALLOW_FILE_EDIT', true);
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}
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// Shorten password reset expiration (15 minutes)
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add_filter('password_reset_expiration', function() {
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return 900;
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});
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}
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add_action('init', 'jvbSecurityOptimizations');
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/**
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* Remove version query strings from static assets
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*/
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function jvbRemoveVersionFromUrl(string $src): string
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{
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return strpos($src, 'ver=') ? remove_query_arg('ver', $src) : $src;
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}
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/**
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* Remove X-Pingback header
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*/
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function jvbRemovePingbackHeader(array $headers): array
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{
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unset($headers['X-Pingback']);
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return $headers;
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}
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/**
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* Block user enumeration attempts
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* Prevents discovery of usernames via URL manipulation
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*/
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function jvbBlockUserEnumeration(): void
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{
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// Block ?author queries and author archives
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if (!is_admin() && (isset($_GET['author']) || is_author())) {
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wp_redirect(home_url(), 301);
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exit;
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}
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}
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/**
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* Remove user endpoints from REST API
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* Prevents user enumeration via REST API
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*/
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function jvbDisableUserEndpoints(array $endpoints): array
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{
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$user_endpoints = [
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'/wp/v2/users',
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'/wp/v2/users/(?P<id>[\d]+)'
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];
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foreach ($user_endpoints as $endpoint) {
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if (isset($endpoints[$endpoint])) {
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unset($endpoints[$endpoint]);
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}
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}
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return $endpoints;
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}
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/*******************************************************************************
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CONTENT MANAGEMENT
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*******************************************************************************/
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/**
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* Clean up attachments when posts are deleted
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* Automatically removes associated media to prevent orphaned files
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*/
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function jvbCleanupPostDeletion(int $post_id): void
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{
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// Delete attached media
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$attachments = get_attached_media('', $post_id);
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foreach ($attachments as $attachment) {
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wp_delete_attachment($attachment->ID, true);
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}
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// Delete custom meta attachments
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$meta_fields = [
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BASE . 'image',
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BASE . 'gallery'
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];
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//TODO: Dynamically use Meta.php to get any image or gallery fields
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foreach ($meta_fields as $meta_key) {
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$meta_value = get_post_meta($post_id, $meta_key, true);
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if (empty($meta_value)) {
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continue;
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}
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// Handle comma-separated IDs
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$attachment_ids = str_contains($meta_value, ',')
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? explode(',', $meta_value)
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: [$meta_value];
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foreach ($attachment_ids as $attachment_id) {
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if (is_numeric($attachment_id)) {
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wp_delete_attachment((int)$attachment_id, true);
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}
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}
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}
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}
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add_action('before_delete_post', 'jvbCleanupPostDeletion');
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/*******************************************************************************
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THEME CUSTOMIZATION
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*******************************************************************************/
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/**
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* Clean up body classes for simpler CSS targeting
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* Removes WordPress defaults and adds only relevant classes
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*/
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function jvbBodyClasses(array $classes): array
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{
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// Start with empty array - only add what we need
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$clean_classes = [];
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// Add contextual classes
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if (is_front_page()) {
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$clean_classes[] = 'home';
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}
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if (function_exists('jvbIsDirectory') && jvbIsDirectory()) {
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$clean_classes[] = 'is-directory';
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} elseif (is_tax()) {
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$clean_classes[] = str_replace(BASE, '', get_queried_object()->taxonomy);
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} elseif (is_singular() && !is_singular('page')) {
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$clean_classes[] = str_replace(BASE, '', get_queried_object()->post_type);
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} elseif (is_post_type_archive()) {
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$clean_classes[] = str_replace(BASE, '', get_queried_object()->name);
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}
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return $clean_classes;
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}
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add_filter('body_class', 'jvbBodyClasses');
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