WordPress Speed Optimization

// Automatic WebP conversion function convert_to_webp($attachment_id) { $image_path = get_attached_file($attachment_id); $webp_path = preg_replace('/\.(jpg|jpeg|png)$/i', '.webp', $image_path); if (function_exists('imagewebp')) { $image = imagecreatefromjpeg($image_path); imagewebp($image, $webp_path, 80); imagedestroy($image); } } add_action('wp_generate_attachment_metadata', 'convert_to_webp');

// Native lazy loading function add_lazy_loading($content) { $content = preg_replace('/<img(.*?)src=/i', '<img$1loading="lazy" src=', $content); return $content; } add_filter('the_content', 'add_lazy_loading'); // Intersection Observer lazy loading <script> const images = document.querySelectorAll('img[data-src]'); const imageObserver = new IntersectionObserver((entries, observer) => { entries.forEach(entry => { if (entry.isIntersecting) { const img = entry.target; img.src = img.dataset.src; img.classList.remove('lazy'); observer.unobserve(img); } }); }); images.forEach(img => imageObserver.observe(img)); </script>

// Custom image sizes add_image_size('mobile', 480, 320, true); add_image_size('tablet', 768, 512, true); add_image_size('desktop', 1200, 800, true); // Responsive image implementation function responsive_image_srcset($html, $attachment_id) { $mobile = wp_get_attachment_image_src($attachment_id, 'mobile')[0]; $tablet = wp_get_attachment_image_src($attachment_id, 'tablet')[0]; $desktop = wp_get_attachment_image_src($attachment_id, 'desktop')[0]; $srcset = "srcset='$mobile 480w, $tablet 768w, $desktop 1200w'"; $sizes = "sizes='(max-width: 480px) 100vw, (max-width: 768px) 100vw, 1200px'"; return str_replace('<img ', "<img $srcset $sizes ", $html); }

-- Database cleanup queries DELETE FROM wp_posts WHERE post_status = 'auto-draft'; DELETE FROM wp_posts WHERE post_type = 'revision'; DELETE FROM wp_comments WHERE comment_approved = 'spam'; DELETE FROM wp_options WHERE option_name LIKE '_transient_%'; -- Optimize tables OPTIMIZE TABLE wp_posts, wp_options, wp_comments, wp_postmeta;

// Optimized query example $args = array( 'post_type' => 'post', 'posts_per_page' => 10, 'meta_query' => array( array( 'key' => 'featured', 'value' => 'yes', 'compare' => '=' ) ), 'no_found_rows' => true, // Skip pagination count 'update_post_meta_cache' => false, // Skip meta cache 'update_post_term_cache' => false // Skip term cache ); $query = new WP_Query($args);

-- Custom indexes for performance CREATE INDEX idx_post_status_date ON wp_posts(post_status, post_date); CREATE INDEX idx_meta_key_value ON wp_postmeta(meta_key, meta_value(10)); CREATE INDEX idx_comment_approved ON wp_comments(comment_approved, comment_date); -- Check index usage SHOW INDEX FROM wp_posts; EXPLAIN SELECT * FROM wp_posts WHERE post_status = 'publish';

// Plugin performance monitoring function monitor_plugin_load_time() { if (current_user_can('administrator')) { $plugins = get_option('active_plugins'); foreach ($plugins as $plugin) { $start_time = microtime(true); include_once WP_PLUGIN_DIR . '/' . $plugin; $end_time = microtime(true); $load_time = ($end_time - $start_time) * 1000; if ($load_time > 100) { // Over 100ms error_log("Slow plugin: $plugin - {$load_time}ms"); } } } }

// Conditional plugin loading function conditional_plugin_loading() { // Load contact form only on contact page if (!is_page('contact')) { remove_action('wp_enqueue_scripts', 'wpcf7_enqueue_scripts'); remove_action('wp_enqueue_scripts', 'wpcf7_enqueue_styles'); } // Load slider only on homepage if (!is_front_page()) { wp_dequeue_script('revolution-slider'); wp_dequeue_style('revolution-slider'); } } add_action('wp_enqueue_scripts', 'conditional_plugin_loading', 100);

// Recommended lightweight plugins /* CACHING: WP Rocket > W3 Total Cache > WP Super Cache SEO: RankMath > Yoast SEO SECURITY: Wordfence > Sucuri BACKUP: UpdraftPlus > BackWPup FORMS: Gravity Forms > Contact Form 7 OPTIMIZATION: Autoptimize + WP-Optimize */ // Custom lightweight contact form function custom_contact_form() { if (isset($_POST['submit_contact'])) { $name = sanitize_text_field($_POST['name']); $email = sanitize_email($_POST['email']); $message = sanitize_textarea_field($_POST['message']); wp_mail('admin@site.com', 'Contact Form', $message); } }

// PHP 8.1 performance optimizations ; php.ini optimizations memory_limit = 512M max_execution_time = 300 upload_max_filesize = 64M post_max_size = 64M ; OPcache settings opcache.enable=1 opcache.memory_consumption=256 opcache.max_accelerated_files=20000 opcache.validate_timestamps=0

# .htaccess GZIP compression <IfModule mod_deflate.c> AddOutputFilterByType DEFLATE text/plain AddOutputFilterByType DEFLATE text/html AddOutputFilterByType DEFLATE text/xml AddOutputFilterByType DEFLATE text/css AddOutputFilterByType DEFLATE application/xml AddOutputFilterByType DEFLATE application/xhtml+xml AddOutputFilterByType DEFLATE application/rss+xml AddOutputFilterByType DEFLATE application/javascript AddOutputFilterByType DEFLATE application/x-javascript </IfModule>

# Apache HTTP/2 setup LoadModule http2_module modules/mod_http2.so Protocols h2 h2c http/1.1 # Nginx HTTP/2 setup server { listen 443 ssl http2; ssl_certificate /path/to/cert.pem; ssl_certificate_key /path/to/key.pem; # HTTP/2 push resources location / { http2_push /wp-content/themes/theme/style.css; http2_push /wp-content/themes/theme/script.js; } }