Question

以下代码在共享主机上给出了这个错误，其中db中查看的表没有任何值

$query = "SELECT COUNT(*) FROM viewed WHERE memberID = :memberID";
        $stmt = $db->prepare($query);
        $stmt->bindParam(':memberID', $uid, PDO::PARAM_INT);
        $stmt->execute();
        $total = $stmt->fetchColumn();    

$pages = ceil($total / $per_page);

$page = min($pages, filter_input(INPUT_GET, 'page', FILTER_VALIDATE_INT, array(
'options' => array(
'default'   => 1,
'min_range' => 1,
),
)));

$offset = ($page - 1)  * $per_page; 

$query = "SELECT * FROM viewed WHERE memberID = :memberID ORDER BY id DESC LIMIT :per_page OFFSET :offset";

         $stmt = $db->prepare($query);
         $stmt->bindParam(':per_page', $per_page, PDO::PARAM_INT);
         $stmt->bindParam(':offset', $offset, PDO::PARAM_INT);
         $stmt->bindParam(':memberID', $uid, PDO::PARAM_INT);
         $stmt->execute();

$result = $stmt->fetchAll();

但是我的配置文件是我删除

$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

然后错误消失，但没有PDO :: ATTR_ERRMODE，PDO :: ERRMODE_EXCEPTION我怎么知道错误？

感谢

Answer 1

这种情况正在发生，因为您不需要在限制和偏移量中绑定变量。你应该只用于绑定where条件。你可以直接进行查询。见下文：

$query = "SELECT * FROM viewed WHERE memberID = :memberID ORDER BY id DESC LIMIT $per_page OFFSET $offset";

         $stmt = $db->prepare($query);
         $stmt->bindParam(':memberID', $uid, PDO::PARAM_INT);

Answer 2

我可能错了，但我相信问题是你在bindParam调用中使用“：memberID”。参数名称为“memberID”。

$query = "SELECT * FROM viewed WHERE memberID = :memberID ORDER BY id DESC LIMIT $per_page OFFSET $offset";

     $stmt = $db->prepare($query);
     $stmt->bindParam('memberID', $uid, PDO::PARAM_INT);

SQLSTATE [HY000]：常规错误：1210 mysqld_stmt_execute参数不正确

2 个答案: