Sitemap XML WordPress: perché l'XML sitemap è ancora essenziale nel 2026

// Aggiungi le immagini alla sitemap nativa di WordPress
add_filter( 'wp_sitemaps_posts_query_args', function( $args, $post_type ) {
    // Assicurati che i post con immagine in evidenza siano inclusi
    $args['meta_query'] = array(
        array(
            'key'     => '_thumbnail_id',
            'compare' => 'EXISTS',
        ),
    );
    return $args;
}, 10, 2 );

// Escludi i custom post type che non vuoi nella sitemap
add_filter( 'wp_sitemaps_registered_post_types', function( $post_types ) {
    // Rimuovi i tipi di post che non vuoi indicizzare
    unset( $post_types['custom_private'] );
    unset( $post_types['internal_docs'] );
    return $post_types;
} );

// Escludi le tassonomie non rilevanti
add_filter( 'wp_sitemaps_registered_taxonomies', function( $taxonomies ) {
    unset( $taxonomies['post_format'] );
    return $tax_types;
} );

// Rank Math: configura la sitemap con immagini
add_filter( 'rank_math/sitemap/content', function( $content, $post ) {
    // Aggiungi l'immagine in evidenza come image:image tag
    if ( has_post_thumbnail( $post->ID ) ) {
        $image_url = get_the_post_thumbnail_url( $post->ID, 'full' );
        if ( $image_url ) {
            $content .= "\n<image:image>\n";
            $content .= "  <image:loc>" . esc_url( $image_url ) . "</image:loc>\n";
            $content .= "  <image:title>" . esc_html( get_the_title( $post->ID ) ) . "</image:title>\n";
            $content .= "</image:image>\n";
        }
    }
    return $content;
}, 10, 2 );

// Escludi pagine specifiche dalla sitemap
add_filter( 'rank_math/sitemap/exclude_post', function( $exclude, $post_id ) {
    $excluded_pages = array( 123, 456, 789 ); // ID delle pagine da escludere
    if ( in_array( $post_id, $excluded_pages ) ) {
        return true;
    }
    return $exclude;
}, 10, 2 );

// Genera una sitemap di news per Google News/Discover
add_action( 'init', function() {
    add_rewrite_rule( '^news-sitemap\.xml$', 'index.php?news_sitemap=1', 'top' );
} );

add_filter( 'query_vars', function( $vars ) {
    $vars[] = 'news_sitemap';
    return $vars;
} );

add_action( 'template_redirect', function() {
    if ( get_query_var( 'news_sitemap' ) ) {
        header( 'Content-Type: application/xml; charset=utf-8' );
        echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
        echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"' . "\n";
        echo '  xmlns:news="http://www.google.com/schemas/sitemap-news/0.9">' . "\n";

        $recent = new WP_Query( array(
            'post_type'      => 'post',
            'posts_per_page' => 100,
            'post_status'    => 'publish',
            'date_query'     => array(
                array( 'after' => '2 days ago' ),
            ),
        ) );

        while ( $recent->have_posts() ) : $recent->the_post();
            $url = get_permalink();
            $date = get_the_date( 'c' );
            $title = get_the_title();
            echo "  <url>\n";
            echo "    <loc>$url</loc>\n";
            echo "    <news:news>\n";
            echo "      <news:publication>\n";
            echo "        <news:name>WP Planet</news:name>\n";
            echo "        <news:language>it</news:language>\n";
            echo "      </news:publication>\n";
            echo "      <news:publication_date>$date</news:publication_date>\n";
            echo "      <news:title>$title</news:title>\n";
            echo "    </news:news>\n";
            echo "  </url>\n";
        endwhile;

        echo '</urlset>';
        exit;
    }
} );