<?php
/**
 * Plugin Name: COMAIN Speed Optimizer
 * Description: mu-plugin for page size optimization: defer non-critical CSS, async JS, remove query strings
 * Version: 1.0
 * Author: COMAIN Dev
 */

// 1. Remove query strings from static resources (improves caching)
add_filter('script_loader_src', 'comain_remove_query_strings', 15, 1);
add_filter('style_loader_src', 'comain_remove_query_strings', 15, 1);
function comain_remove_query_strings($src) {
    if (strpos($src, '?ver=') !== false) {
        $src = remove_query_arg('ver', $src);
    }
    return $src;
}

// 2. Defer selected non-critical JS (exclude jQuery, WooCommerce cart)
add_filter('script_loader_tag', 'comain_defer_js', 10, 3);
function comain_defer_js($tag, $handle, $src) {
    $exclude = array(
        'jquery', 'jquery-core', 'jquery-migrate',
        'wc-cart-fragments', 'wc-add-to-cart',
    );
    if (in_array($handle, $exclude)) {
        return $tag;
    }
    // Defer all theme/plugin scripts except inline
    if (strpos($tag, 'src=') !== false && strpos($tag, 'defer') === false) {
        return str_replace(' src=', ' defer src=', $tag);
    }
    return $tag;
}

// 3. Disable emoji JS (saves ~15KB)
remove_action('wp_head', 'print_emoji_detection_script', 7);
remove_action('wp_print_styles', 'print_emoji_styles');

// 4. Disable oEmbed discovery (saves ~10KB)
remove_action('wp_head', 'rest_output_link_wp_head', 10);
remove_action('wp_head', 'wp_oembed_add_discovery_links');
remove_action('wp_head', 'wp_oembed_add_host_js');

// 5. Remove shortlink and WLW manifest
remove_action('wp_head', 'wlwmanifest_link');
remove_action('wp_head', 'rsd_link');
remove_action('wp_head', 'wp_shortlink_wp_head');

// 6. Disable WooCommerce generic styles where not needed
add_filter('woocommerce_enqueue_styles', 'comain_disable_wc_styles');
function comain_disable_wc_styles($styles) {
    if (!is_checkout() && !is_cart() && !is_account_page()) {
        unset($styles['wc-blocks-style']);
    }
    return $styles;
}

// 7. Add missing security headers via PHP
add_action('send_headers', function() {
    header('X-Frame-Options: SAMEORIGIN');
    header('X-Content-Type-Options: nosniff');
    header('Referrer-Policy: strict-origin-when-cross-origin');
    header('Permissions-Policy: geolocation=(), microphone=(), camera=()');
    header('X-XSS-Protection: 1; mode=block');
});

// 8. Remove query strings from WP Rocket cache buster
add_filter('rocket_cache_busting_filename', function($filename) {
    return preg_replace('/-[a-f0-9]{32,}/', '', $filename);
});

if (!defined('REST_REQUEST') || !REST_REQUEST) {
    echo '<!-- comain-speed-optimizer active -->';
}
<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="//kmceramic.company/main-sitemap.xsl"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
	<sitemap>
		<loc>https://kmceramic.company/post-sitemap.xml</loc>
		<lastmod>2026-07-13T13:26:47+00:00</lastmod>
	</sitemap>
	<sitemap>
		<loc>https://kmceramic.company/page-sitemap.xml</loc>
		<lastmod>2026-07-11T13:34:52+00:00</lastmod>
	</sitemap>
	<sitemap>
		<loc>https://kmceramic.company/product-sitemap.xml</loc>
		<lastmod>2026-06-30T01:00:16+00:00</lastmod>
	</sitemap>
	<sitemap>
		<loc>https://kmceramic.company/astra-advanced-hook-sitemap.xml</loc>
		<lastmod>2026-07-04T01:02:58+00:00</lastmod>
	</sitemap>
	<sitemap>
		<loc>https://kmceramic.company/local-sitemap.xml</loc>
		<lastmod>2026-05-04T08:17:24+00:00</lastmod>
	</sitemap>
</sitemapindex>
<!-- XML Sitemap generated by Rank Math SEO Plugin (c) Rank Math - rankmath.com -->