Optimized & Safe NexSouk Performance Booster Snippet (with toggles off for embeds + block CSS)

// ===============================

// ✅ NexSouk Performance Booster (Safe Version)

// PHP performance enhancements for:

// - Load speed

// - Core Web Vitals

// - Accessibility

// ===============================

add_action('init', function() {

    // ✅ Disable Emoji Scripts (safe)

    remove_action('wp_head', 'print_emoji_detection_script', 7);

    remove_action('wp_print_styles', 'print_emoji_styles');

    // ⚠️ Optional: Disable oEmbed JavaScript (commented out for safety)

    // remove_action('rest_api_init', 'wp_oembed_register_route');

    // remove_filter('rest_pre_serve_request', '_oembed_rest_pre_serve_request', 10);

    // remove_filter('oembed_dataparse', 'wp_filter_oembed_result', 10);

    // remove_action('wp_head', 'wp_oembed_add_discovery_links');

    // remove_action('wp_head', 'wp_oembed_add_host_js');

});

// ✅ Remove Query Strings from Static Assets (safe)

add_filter('script_loader_src', 'nexsouk_strip_query_strings', 15, 1);

add_filter('style_loader_src', 'nexsouk_strip_query_strings', 15, 1);

function nexsouk_strip_query_strings($src) {

    return remove_query_arg('ver', $src);

}

// ⚠️ Optional: Remove Gutenberg Block Editor CSS (commented out)

add_action('wp_enqueue_scripts', function() {

    // wp_dequeue_style('wp-block-library');

    // wp_dequeue_style('wp-block-library-theme');

}, 100);

// ✅ Optimize Heartbeat API frequency (safer version)

add_filter('heartbeat_settings', function($settings) {

    $settings['interval'] = 30; // Less aggressive, still helpful

    return $settings;

});

// ✅ Set Lazy Loading for Images (safe)

add_filter('wp_lazy_loading_enabled', '__return_true');

// ✅ Add Width/Height to Images to Prevent CLS (safe)

add_filter('the_content', function($content) {

    return preg_replace_callback('/<img(.*?)src=["\']([^"\']+)["\'](.*?)>/i', function($matches) {

        $img_tag = $matches[0];

        $src = $matches[2];

        $size = @getimagesize($src);

        if ($size && isset($size[0]) && isset($size[1])) {

            if (strpos($img_tag, 'width=') === false && strpos($img_tag, 'height=') === false) {

                return str_replace('<img', '<img width="' . $size[0] . '" height="' . $size[1] . '"', $img_tag);

            }

        }

        return $img_tag;

    }, $content);

});

// ✅ Lazy Load All Images Except First (safe)

add_filter('the_content', function($content) {

    static $img_counter = 0;

    return preg_replace_callback('/<img(.*?)>/i', function($matches) use (&$img_counter) {

        $img_counter++;

        $img = $matches[0];

        if ($img_counter === 1) {

            return str_replace('<img', '<img decoding="async" fetchpriority="high"', $img);

        }

        return str_replace('<img', '<img loading="lazy" decoding="async"', $img);

    }, $content);

});

// ✅ Preload Featured Image in Head for Faster LCP (safe)

add_action('wp_head', function() {

    if (is_singular() && has_post_thumbnail()) {

        $image = wp_get_attachment_image_src(get_post_thumbnail_id(), 'full');

        if ($image && isset($image[0])) {

            echo '<link rel="preload" as="image" href="' . esc_url($image[0]) . '" fetchpriority="high">' . "\n";

        }

    }

});

// ✅ Preconnect to Google Fonts (safe)

add_action('wp_head', function() {

    echo '<link rel="preconnect" href="https://fonts.googleapis.com" crossorigin>' . "\n";

    echo '<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>' . "\n";

}, 1);