Question

所以在学校项目上工作，我正在尝试创建一种方法来更新页面上的现有产品，只有我想要更新的价格和描述。我无法解决我出错的地方。提前致谢。

现在在update.php页面上，我创建了一个功能，以便在选项，选择表单中动态显示产品。

这是错误，

查询失败您的SQL语法中有错误;检查手册对应于您的MySQL服务器版本，以获得正确的语法在第1行的'WHERE product = SAMSUNG 60" FULL HD QUAD CORE 3D SMART LCD LED TV'附近使用。

这是我的更新功能

function updateData（）{

    if(isset($_POST['submit'])) {
    global $db;    

   $itemName = $_POST['product'];
   $itemprice =  $_POST['itemPrice']; 
    $itemDescription = $_POST['itemDescription'];        


   $query = "UPDATE products SET ";
  $query .= " price = `$itemprice`, ";
   $query .= " description = `$itemDescription`, ";     
  $query .= " WHERE product = `$itemName` ";

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

  if(!$result) {

    die("query failed" . mysqli_error($db));  
   } else {

      echo "Your details have been updated";
       }

     }

   }

这是我的update.php页面

        require_once ("Includes/simplecms-config.php"); 
    require_once ("Includes/connectDB.php");
    include("Includes/header.php");  
    include("functionsphp.php");

    confirm_is_admin();
    updateData();


    // max file size for the html upload form
    $max_file_size = 50 * 1024 * 1024; // size in bytes

    // directory that will recieve the uploaded file
    $dir = 'Images/products/';

?>

<div id="container">
    <div id="admin">
        <h1>update  Product</h1>
        <form id="product_form" class="dialogform"
    action="editProduct.php" method="post" enctype="multipart/form-
   data">
            <div class="form_description">
                <p>Fill in the details below to update details to the
       catalog item.</p>

                <select class="description" name="product" id="">

                <?php ShowProduct();?>  

            </select>   
            </div>

      <div id="container">
    <div id="admin">
        <h1>update Product</h1>
        <form id="product_form" class="dialogform" 
      action="addProduct.php" method="post" enctype="multipart/form-
      data">
            <div class="form_description">
                <p>Fill in the details below to update the product to




        the catalog.</p>
            </div>

            <label class="description" for="itemPrice">Price</label>
            <div>
                <input id="itemPrice" name="itemPrice" type="text"
         maxlength="255" />
            </div>

            <label class="description" 
      for="itemDescription">Description</label>
            <div>
                <textarea style="width: 350px; height: 108px;"   
     id="itemDescription" name="itemDescription"></textarea>
            </div>


            <input id="submit_button" class="button_text" 
           type="submit" name="submit" value="Submit" />
        </form>
       </div>
   </div>

Answer 1

$query = "
UPDATE products 
   SET price = $itemprice
     , description = '$itemDescription'
 WHERE product = '$itemName'
";

现在查看准备和绑定的查询。如前所述，where子句应引用主键

查询失败。更新时，SQL语法中有错误

1 个答案: