Не выводить в поиске слова из 1,2,3 букв

function wph_search_by_title($search, &$wp_query) {
    global $wpdb;
    if (mb_strlen($search) < 4) return $search;
 
    $q = $wp_query->query_vars;
    $n = !empty($q['exact']) ? '' : '%';
    $search = $searchand = '';
 
    foreach ((array) $q['search_terms'] as $term) {
       $term = esc_sql($wpdb->esc_like($term));
       $search.="{$searchand}($wpdb->posts.post_title LIKE '{$n}{$term}{$n}')";
       $searchand = ' AND ';
    }
 
    if (!empty($search)) {
        $search = " AND ({$search}) ";
        if (!is_user_logged_in())
            $search .= " AND ($wpdb->posts.post_password = '') ";
    }
    return $search;
}
add_filter('posts_search', 'wph_search_by_title', 500, 2);

function wph_search_by_title($search) {
    
    if (mb_strlen($search) < 4) return 'незя';
 
    //...........code............
    
    return 'мона';
}
echo wph_search_by_title('sea').'<br>';
echo wph_search_by_title('search').'<br>';

function wph_search_by_title($search, &$wp_query) {
    global $wpdb;
    if (empty($search)) return $search;
 
    $q = $wp_query->query_vars;
    $n = !empty($q['exact']) ? '' : '%';
    $search = $searchand = '';
 
    foreach ((array) $q['search_terms'] as $term) {
       $term = esc_sql($wpdb->esc_like($term));
       if (mb_strlen($term) < 4) continue;
       $search.="{$searchand}($wpdb->posts.post_title LIKE '{$term}%')";
       $searchand = ' AND ';
    }
 
    if (!empty($search)) {
        $search = " AND ({$search}) ";
        if (!is_user_logged_in())
            $search .= " AND ($wpdb->posts.post_password = '') ";
    } else {
        return 'false';
    }
    
    return $search;
}
add_filter('posts_search', 'wph_search_by_title', 500, 2);

  if (mb_strlen($term) < 4) continue;