Php 按数据库中的不同变量对匹配进行排序？

因此，我希望能够更改搜索查询结果的列出方式。top（按相关性排序）有效，但当我尝试按同一数据库中的不同变量排序时，它不起作用。有什么建议吗？谢谢你

    if(!isset($_SESSION['sortby']) or $qsortby=="relevance")
{
    $result = 
    "SELECT *,
        MATCH (title, keywords) AGAINST ('+".$q."' IN BOOLEAN MODE) AS relevance,
        MATCH (title) AGAINST ('+".$q."' IN BOOLEAN MODE) AS title_relevance
        FROM designs
        WHERE MATCH (title, keywords) AGAINST ('".$q."')
        ORDER BY title_relevance DESC, relevance DESC";
 }
        else
        {
        $result = 
    "SELECT *,
            MATCH (title, keywords) AGAINST ('+".$q."' IN BOOLEAN MODE) AS relevance,
        FROM designs
        WHERE MATCH (title, keywords) AGAINST ('".$q."')
        ORDER BY rating DESC";
        }

---

$q

在哪里发挥作用；这不会被误认为是

$qsortby

，对吗？$q是我的搜索查询