Question

我正在尝试使用php从最低到最高，从最高到最低做一个简单的顺序无效。

我不知道是什么让它停止工作，我总是将mysql数据ordered by yt.id从最低点到最高点出于某种奇怪的原因。

这是我的查询代码：

$clause = " WHERE ";//Initial clause
$sql="SELECT *
FROM `yt`
INNER JOIN `ATTRIBUTES` ON yt.id=ATTRIBUTES.id";//Query stub
    if(isset($_POST['keyword'])){

        foreach($_POST['keyword'] as $c){
            if(!empty($c)){
                $keyword2 = $_POST['keyword2'];
                ##NOPE##$sql .= $clause."`".$c."` LIKE '%{$c}%'";
                $sql .= $clause . " (ATTRIBUTES.sizes LIKE BINARY '$c' OR ATTRIBUTES.colors LIKE BINARY '$c' OR ATTRIBUTES.manu LIKE BINARY '$c' OR ATTRIBUTES.attr LIKE BINARY '$c') AND ATTRIBUTES.type='$keyword2'";
                $clause = " OR ";//Change  to OR after 1st WHERE
            }
        }
        $sql .= " GROUP BY yt.id";
        $sql .= " ORDER BY yt.id DESC";

///rest of my code/////

我做什么并不重要，我总是从最低到最高！

我是这样做的吗？

任何帮助将不胜感激。

Answer 1

你总是有$_POST['keyword']吗？

如果没有，或者即使您尝试过：

$clause = " WHERE ";//Initial clause
$sql="SELECT *
FROM `yt`
INNER JOIN `ATTRIBUTES` ON yt.id=ATTRIBUTES.id";//Query stub
if(isset($_POST['keyword'])){

    foreach($_POST['keyword'] as $c){
        if(!empty($c)){
            $keyword2 = $_POST['keyword2'];
            ##NOPE##$sql .= $clause."`".$c."` LIKE '%{$c}%'";
            $sql .= $clause . " (ATTRIBUTES.sizes LIKE BINARY '$c' OR ATTRIBUTES.colors LIKE BINARY '$c' OR ATTRIBUTES.manu LIKE BINARY '$c' OR ATTRIBUTES.attr LIKE BINARY '$c') AND ATTRIBUTES.type='$keyword2'";
            $clause = " OR ";//Change  to OR after 1st WHERE
        }
    }
}
$sql .= " GROUP BY yt.id";
$sql .= " ORDER BY yt.id DESC";

或者只是向我们展示一个完整的代码片段，如果没有或在if(isset($_POST['keyword'])){

之后会发生什么

通过PHP加入表和订单？

1 个答案: