Question

当我运行我的代码

时，我总是会收到此错误

0:
Warning: mysql_fetch_assoc() expects parameter 1 to be resource, boolean given in C:\xampp\htdocs\fyp\admin_vieworders_details.php on line 12
Query Failed!You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1

这是我的数据库

table order_detail {Order_Detail_ID（PK），Order_Quantity，Sub_Total}

表单{Order_ID，Order_Date，Order_Time，Delivery_Charge，Delivery_Name}

这是我的代码

$orderid =@$_GET["id"];  
$detail = "SELECT 
                order.*,
                order_detail.Order_Quantity,
                order_detail.Sub_Total
            FROM `order` AS a, `order_detail` AS b
            WHERE order_detail.Order_ID = `order`.Order_ID AND order_detail.Order_Detail_ID=$orderid";

$result = mysql_query($detail);
$row = mysql_fetch_assoc($result);

        if($result === FALSE)
    {
            die("Query Failed!".mysql_error().$result);
    }

Answer 1

在致电mysql_error()之前检查mysql_fetch_assoc()。您的查询失败，查询函数返回false。

$result = mysql_query($detail);
if (!$result) {
    die("Error: ".mysql_error()); // Note: raw database errors are useless for users
                                  // better log the error an create a "nice" error page
}
$row = mysql_fetch_assoc($result);

或者这样可能会让你开始。

Answer 2

您的查询中似乎有错误：

尝试：

$detail = "SELECT 
                a.*,
                b.Order_Quantity,
                b.Sub_Total
            FROM `order` AS a, `order_detail` AS b
            WHERE b.Order_Detail_ID = a.Order_ID AND
                  b.Order_Detail_ID=$orderid";

而不是

$detail = "SELECT 
                order.*,
                order_detail.Order_Quantity,
                order_detail.Sub_Total
            FROM `order` AS a, `order_detail` AS b
            WHERE order_detail.Order_ID = `order`.Order_ID AND
                   order_detail.Order_Detail_ID=$orderid";

还有......

$orderid =$_GET["orderid"];

而不是

$orderid =@$_GET["id"];

Answer 3

更改此

 $orderid =@$_GET["id"];

到

 $orderid =$_GET['id'];

警告：mysql_fetch_assoc（）期望参数1是资源，布尔值在

3 个答案: