Оптимизация кастомной темы WordPress для Core Web Vitals и семантического SEO

function optimize_theme_performance() {
 // Удаление ненужных элементов из head
 remove_action('wp_head', 'wp_generator');
 remove_action('wp_head', 'rsd_link');
 remove_action('wp_head', 'wlwmanifest_link');
 
 // Оптимизированная загрузка CSS с версионированием
 wp_enqueue_style('main-style', get_stylesheet_uri(), array(), wp_get_theme()->get('Version'), 'all');
 
 // Отложенная загрузка критических скриптов
 wp_enqueue_script('critical-js', get_template_directory_uri() . '/js/critical.js', array(), null, true);
}
add_action('wp_enqueue_scripts', 'optimize_theme_performance');

echo wp_get_attachment_image(get_post_thumbnail_id(), 'full', false, array(
 'loading' => 'lazy',
 'decoding' => 'async'
));

// В header.php
<h1 class="page-title"><?php the_title(); ?></h1>

// В single.php
<h1 class="post-title"><?php the_title(); ?></h1>

// В archive.php
<h1 class="archive-title"><?php the_archive_title(); ?></h1>

class SemanticSEO {
 public function __construct() {
 add_action('wp_head', [$this, 'add_meta_tags']);
 }
 
 public function add_meta_tags() {
 if (is_singular()) {
 echo '<meta name="description" content="' . esc_attr(get_the_excerpt()) . '">';
 echo '<meta name="author" content="' . esc_attr(get_the_author()) . '">';
 }
 }
}
new SemanticSEO();

function split_critical_assets() {
 // Критические стили в head
 wp_enqueue_style('critical-css', get_template_directory_uri() . '/css/critical.css', array(), '1.0.0');
 
 // Некритические стили с отложенной загрузкой
 wp_enqueue_style('non-critical-css', get_template_directory_uri() . '/css/main.css', array(), '1.0.0');
 add_filter('style_loader_tag', function($tag, $handle) {
 if ($handle === 'non-critical-css') {
 return '<link rel="preload" href="' . get_template_directory_uri() . '/css/main.css" as="style" onload="this.onload=null;this.rel=\'stylesheet\'" id="non-critical-css">';
 }
 return $tag;
 }, 10, 2);
}
add_action('wp_enqueue_scripts', 'split_critical_assets');

function conditional_script_loading() {
 if (is_page_template('template-contact.php')) {
 wp_enqueue_script('contact-form-script', get_template_directory_uri() . '/js/contact.js', array('jquery'), '1.0.0', true);
 }
 if (is_single()) {
 wp_enqueue_script('comments-script', get_template_directory_uri() . '/js/comments.js', array(), '1.0.0', true);
 }
}
add_action('wp_enqueue_scripts', 'conditional_script_loading');

function optimized_image_output($size = 'medium', $class = 'responsive-image') {
 if (has_post_thumbnail()) {
 $thumbnail_id = get_post_thumbnail_id();
 $image_src = wp_get_attachment_image_src($thumbnail_id, $size);
 $image_alt = get_post_meta($thumbnail_id, '_wp_attachment_image_alt', true);
 
 echo '<img src="' . esc_url($image_src[0]) . '" 
 width="' . esc_attr($image_src[1]) . '" 
 height="' . esc_attr($image_src[2]) . '" 
 class="' . esc_attr($class) . '" 
 alt="' . esc_attr($image_alt) . '" 
 loading="lazy">';
 }
}

add_filter('wp_generate_attachment_metadata', function($metadata, $attachment_id) {
 if (wp_attachment_is_image($attachment_id)) {
 $file = get_attached_file($attachment_id);
 $image = wp_get_image_editor($file);
 
 if (!is_wp_error($image)) {
 $image->save(str_replace('.jpg', '.webp', $file), 'image/webp');
 }
 }
 return $metadata;
}, 10, 2);

function dynamic_heading_output() {
 if (is_front_page()) {
 echo '<h1 class="site-title">' . get_bloginfo('name') . '</h1>';
 } elseif (is_home()) {
 echo '<h1 class="page-title">' . single_post_title('', false) . '</h1>';
 } elseif (is_single()) {
 echo '<h1 class="post-title">' . get_the_title() . '</h1>';
 } elseif (is_archive()) {
 echo '<h1 class="archive-title">' . get_the_archive_title() . '</h1>';
 } else {
 echo '<h1 class="page-title">' . get_the_title() . '</h1>';
 }
}

function semantic_content_structure($content) {
 if (is_single()) {
 $content = '<article class="post-content">' . $content . '</article>';
 } elseif (is_page()) {
 $content = '<section class="page-content">' . $content . '</section>';
 }
 return $content;
}
add_filter('the_content', 'semantic_content_structure');

function add_schema_markup() {
 if (is_singular()) {
 $schema = array(
 '@context' => 'https://schema.org',
 '@type' => 'Article',
 'headline' => get_the_title(),
 'description' => get_the_excerpt(),
 'author' => array(
 '@type' => 'Person',
 'name' => get_the_author()
 ),
 'publisher' => array(
 '@type' => 'Organization',
 'name' => get_bloginfo('name'),
 'logo' => array(
 '@type' => 'ImageObject',
 'url' => get_template_directory_uri() . '/logo.png'
 )
 ),
 'datePublished' => get_the_time('c'),
 'dateModified' => get_the_modified_time('c')
 );
 
 echo '<script type="application/ld+json">' . json_encode($schema) . '</script>';
 }
}
add_action('wp_head', 'add_schema_markup');

function generate_breadcrumbs() {
 echo '<nav class="breadcrumbs" aria-label="Breadcrumbs">';
 echo '<ol class="breadcrumb-list">';
 
 if (!is_front_page()) {
 echo '<li><a href="' . esc_url(home_url('/')) . '">Главная</a></li>';
 
 if (is_single()) {
 echo '<li>' . get_the_title() . '</li>';
 } elseif (is_category()) {
 echo '<li>' . single_cat_title('', false) . '</li>';
 } elseif (is_page()) {
 echo '<li>' . get_the_title() . '</li>';
 }
 }
 
 echo '</ol></nav>';
}