Question

我正在尝试在tbl_ordetails中插入数据然后更新tbl_cart中的数据，但是当我尝试插入数据时，结果总是“失败” ，我不知道是什么问题。请帮帮我

<?php
include ("connection.php");
if(isset($_POST['btnSubmit']))
{




$fullname=$_POST['fullname'];
$address=$_POST['address'];
$phone_number=$_POST['phone_number'];
$city=$_POST['city'];
$customer=$_POST['customer'];

$query = "INSERT INTO tbl_orderdetails (fullname, address, phone_number, city, customer) VALUES ('$fullname, $address, $phone_number, $city, $customer')";
$query1 = "UPDATE tbl_cart SET status ='Ordered' WHERE customer=['$customer']";

 $result = mysqli_query($conn, $query);

   if(($conn->query($query1) === TRUE) && ($result->num_rows > 0)){
            echo "success";
            exit;

    }
    else{
         echo "failed";
         exit;

    }


}
?>

提前致谢

Answer 1

您在...中缺少引号？

$query = "INSERT INTO tbl_orderdetails (fullname, address, phone_number, city, customer) 
      VALUES ('$fullname, $address, $phone_number, $city, $customer')";

它正在获取所有值并构建1值。应该是

$query = "INSERT INTO tbl_orderdetails (fullname, address, phone_number, city, customer) 
      VALUES ('$fullname', '$address', '$phone_number', '$city', '$customer')";

您的更新应为（减[]）

$query1 = "UPDATE tbl_cart SET status ='Ordered' WHERE customer='$customer'";

更好的方法是使用预处理语句并绑定变量。

<强>更新

   $result = $conn->query($query);
   if ( $result === false ) {
       echo "error:".$conn->error;
       exit;
   }

   if($conn->query($query1) === TRUE){
            echo "success";
            exit;

    }
    else{
         echo "failed:".$conn->error;
         exit;

    }

Answer 2

我认为你的问题在于这行代码 if（（$ conn-＆gt; query（$ query1）=== TRUE）＆amp;＆amp;（$ result-＆gt; num_rows＆gt; 0））{

您实现了行计数<?php include ("connection.php"); if(isset($_POST['btnSubmit'])) { $fullname=$_POST['fullname']; $address=$_POST['address']; $phone_number=$_POST['phone_number']; $city=$_POST['city']; $customer=$_POST['customer']; $query = "INSERT INTO tbl_orderdetails (fullname, address, phone_number, city, customer) VALUES ('$fullname, $address, $phone_number, $city, $customer')"; $query1 = "UPDATE tbl_cart SET status ='Ordered' WHERE customer=['$customer']"; $result = mysqli_query($conn, $query); if($result){ echo "success"; exit; } else{ echo "failed"; exit; } } ?>，但我没有看到您在哪里使用 sql select query statement ，那么您在哪里获得行计数。它是否应该在插入数据时或从数据库中选择数据时使用。

我不是mysqli粉丝而是PDO

你可以尝试这样的事情

{{1}}

我可以使用PDO更轻松地重写代码

同样，您的脚本未经过清理或验证，您很容易受到注入，并且可能是缓冲区溢出攻击

MySQL Query双查询

2 个答案: