Дублирующиеся title в вебмастер

/*** Функция вывода rel="canonical" ***/ 
remove_action('wp_head', 'rel_canonical');
function mayak_wp_canonical(){
if ( !is_singular() )
                return;
        global $wp_the_query;
        if ( !$id = $wp_the_query->get_queried_object_id() )
                return;
        $link = get_permalink( $id );
        if ( $page = get_query_var('cpage') )
                $link = get_comments_pagenum_link( $page );
        echo "<link rel='canonical' href='$link' />\n";
}
add_action('wp_head', 'mayak_wp_canonical',3);
function mayak_canonical(){
                if (is_home() ) {
                        $mayak_chief_link = get_option('home');
                        $mayak_home_link = mayak_link_paged($mayak_chief_link);
                        {
                echo "".'<link rel="canonical" href="'.$mayak_home_link.'" />'."\n"; 
        }
} else if (is_category()) {
                        $mayak_cat_link = get_category_link(get_query_var('cat'));
                        $mayak_category_link = mayak_link_paged($mayak_cat_link);
                        {
                echo "".'<link rel="canonical" href="'.$mayak_category_link.'" />'."\n"; 
        }
} else if (function_exists('is_tag') && is_tag()){
                        $tag = get_term_by('slug',get_query_var('tag'),'post_tag');
                if (!empty($tag->term_id)) {
                $tag_link = get_tag_link($tag->term_id);
                } 
                        $mayak_tag_link = mayak_link_paged($tag_link);
                        $mayak_tag_link = trailingslashit($mayak_tag_link);
                   {
                echo "".'<link rel="canonical" href="'.$mayak_tag_link.'" />'."\n"; 
        }
} else if (is_author()){
                        global $cache_userdata;
                $userid = get_query_var('author');
                $mayak_auth_link = get_author_posts_url ( 'ID' );
                $mayak_author_link = mayak_link_paged($mayak_auth_link);
        {
                echo "".'<link rel="canonical" href="'.$mayak_author_link.'" />'."\n"; 
        }
} 
else if (is_date()){
if (get_query_var('m')) {
                        $m = preg_replace('/[^0-9]/', '', get_query_var('m'));
                        switch (strlen($m)) {
                            case 0: 
                                $mayak_date_link = get_year_link($m);
                                                $mayak_date_link = mayak_link_paged( $mayak_date_link );
                                break;
                            case 1: 
                                $mayak_date_link = get_month_link(substr($m, 0, 4), substr($m, 4, 2));
                                                $mayak_date_link = mayak_link_paged( $mayak_date_link );
                                break;
                            case 2: 
                                $mayak_date_link = get_day_link( substr($m, 0, 4), substr($m, 4, 2), substr($m, 6, 2));
                                                $mayak_date_link = mayak_link_paged( $mayak_date_link );                                         
                                break;
                            default:
                                $mayak_date_link = '';
                        }
                                }
                                if (is_day()) {
                        $mayak_date_link = get_day_link(get_query_var('year'),  get_query_var('monthnum'), get_query_var('day'));
                                $mayak_date_link = mayak_link_paged($mayak_date_link);                                   
                    } else if (is_month()) {
                        $mayak_date_link = get_month_link(get_query_var('year'), get_query_var('monthnum'));
                                $mayak_date_link = mayak_link_paged($mayak_date_link);                                     
                    } else if (is_year()) {
                        $mayak_date_link = get_year_link(get_query_var('year'));
                                $mayak_date_link = mayak_link_paged($mayak_date_link);
                    }
                {
                echo "".'<link rel="canonical" href="'.$mayak_date_link.'" />'."\n"; 
                }
        }
}
function mayak_link_paged($link) {
                        $mayak_page = get_query_var('paged');
                        $mayak_check = function_exists('user_trailingslashit');
            if ($mayak_page && $mayak_page > 1) {
                $link = trailingslashit($link) ."page/". "$mayak_page";
                if ($mayak_check) {
                    $link = user_trailingslashit($link, 'paged');
                } else {
                    $link .= '/';
                }
                }
                        return $link;
        }
add_action('wp_head', 'mayak_canonical');

/*** Конец функции вывода rel="canonical" ***/

Ужас какой... Она вроде тоже не говорила, что у неё вордпресс.

Ах, да. Я ж забыл, что им тут все почти пользуются...

вот за это я "люблю" программистов

У "нее" вордпресс.

Подскажите в какой файл сайта этот код вставить?

https://seo-mayak.com/sozdanie-bloga/wordpress-dlya-novichkov/atribut-rel-canonical-ssylki-na-kanonicheskie-stranicy.html

Да я понял, к вам никаких претензий. Это отсылка к другому топику.

А если на сайте установлен плагин Yoast Seo не достаточно в настройках убрать галочку с 

"Показывать страницы в результатах поиска"?