Question

它的问题很小，但我一直在看这个年龄，但仍然无法让它工作，我得到两个错误

警告：PDOStatement :: execute（）：SQLSTATE [HY093]：参数号无效：

中未定义参数

警告：PDOStatement :: execute（）：SQLSTATE [HY093]：

中的参数号无效

我的代码是：

 public function getdata ($tran_id)
     {
        $sql = "SELECT tran_id, seller_user_name, user_name_buyer 
                FROM trade_transaction, feedback Where  feedback.feedback_username = trade.user_name_of_buyer 
              AND user_name_of_buyer = :user_name_buyer ";
         $sth = $this->db->prepare($sql);
         $sth->execute(array(':tran_id' => $tran_id, ':user_name_buyer ' => $_SESSION['user_name']));

         $user = $sth->fetch();

Answer 1

您在致电:tran_id期间绑定了execute参数，但您未在查询中使用该参数。

将您的execute行更改为此

$sth->execute(array(':user_name_buyer ' => $_SESSION['user_name']));

Answer 2

从参数列表中删除:tran_id或为该参数添加条件。我希望这有帮助。

Answer 3

你的select语句没有tran_id的where子句，要么从执行调用中删除tran_id

$sth->execute(array(':user_name_buyer ' => $_SESSION['user_name']));

或在sql语句中添加一个额外的where子句

$sql = "SELECT tran_id, seller_user_name, user_name_buyer 
                FROM trade_transaction, feedback
          WHERE  feedback.feedback_username = trade.user_name_of_buyer
              AND tran_id = :tran_id 
              AND user_name_of_buyer = :user_name_buyer ";

从数据库中选择无效参数？

3 个答案: