Как убрать ошибку с выводом текста из back-link (знак вопроса при сокращении)?

// Начало: ссылки на следующую и предыдущую новости
$backnext_allow = 1;
    if( $backnext_allow ) {

        if( !$config['allow_cache'] ) {
            $config['allow_cache'] = 1;
            $revert_cache = true;
        } else
            $revert_cache = false;

        $back_link = dle_cache( "backlink", $row['id'] );
        $next_link = dle_cache( "nextlink", $row['id'] );

// Предыдущая новость
if( $back_link === FALSE ) {
    $backlink = $db->super_query( "SELECT id,  title, category, alt_name FROM " . PREFIX . "_post WHERE id < {$row['id']} AND category = '{$row['category']}' AND approve = '1' ORDER BY id DESC LIMIT 0,1" );
    if( $backlink ) {
        $backlink['category'] = intval( $backlink['category'] );
            if( strlen( $backlink['title'] ) > 70 ) $backlink['title'] = substr( $backlink['title'], 0, 70 ) . "...";
                if( $config['allow_alt_url'] ) {
                    if( $backlink['category'] and $config['seo_type'] == 2 ) {
                        $back_link = $config['http_home_url'] . get_url( $backlink['category'] ) . "/" . $backlink['id'] . "-" . $backlink['alt_name'] . ".html";
                    } else {
                        $back_link = $config['http_home_url'] . $backlink['id'] . "-" . $backlink['alt_name'] . ".html";
                    }
                } else {
                    $back_link = $config['http_home_url'] . "index.php?newsid=" . $backlink['id'];
                }
        } else {
            $back_link = "";
        }
        if( $back_link ) {
            $back_link = "<span>Ранее » <b><a href=\"" . $back_link . "\">" . stripslashes( $backlink['title'] ) . "</a></b></span>";
        }
        $db->free();
        create_cache( "backlink", $back_link, $row['id'] );
    }

// Следующая новость
if( $next_link === FALSE ) {
    $nextlink = $db->super_query( "SELECT id, title, category, alt_name FROM " . PREFIX . "_post WHERE id > {$row['id']} AND category = '{$row['category']}' AND approve = '1' ORDER BY id ASC LIMIT 0,1" );
    if ( $nextlink ) {
        $nextlink['category'] = intval( $nextlink['category'] );
            if( strlen( $nextlink['title'] ) > 70 ) $nextlink['title'] = substr( $nextlink['title'], 0, 70 ) . "...";
            if( $config['allow_alt_url'] ) {
                    if( $nextlink['category'] and $config['seo_type'] == 2 ) {
                        $next_link = $config['http_home_url'] . get_url( $nextlink['category'] ) . "/" . $nextlink['id'] . "-" . $nextlink['alt_name'] . ".html";
                        } else {
                            $next_link = $config['http_home_url'] . $nextlink['id'] . "-" . $nextlink['alt_name'] . ".html";
                        }
                } else {
                    $next_link = $config['http_home_url'] . "index.php?newsid=" . $nextlink['id'];
                }
            } else {
                $next_link = "";
            }
            if( $next_link ) {
                $next_link = "<span style=\"float:right\">« Далее <b><a href=\"" . $next_link . "\">" . stripslashes( $nextlink['title'] ) . "</a></b></span>";
            }
            $db->free();
            create_cache( "nextlink", $next_link, $row['id'] );
        }

// Сссылки
        $tpl->set( '{back-link}', $back_link );
        $tpl->set( '{next-link}', $next_link );

        if( $revert_cache ) $config['allow_cache'] = 0;
    }
// Конец: ссылки на следующую и предыдущую новости