Question

我在这里泡菜。每当我尝试按下项目中的删除按钮时，它会直接进入PHP文件，对我为其设置的数据库不执行任何操作。

以下是一些可以帮助您的视觉效果：

视觉编号2

这是index.php的代码：

<?php
require_once('database.php');

//Get Category Id
$category_id= filter_input(INPUT_GET, 'category_id', FILTER_VALIDATE_INT);
if ($category_id == NULL || $category_id == false){
    $category_id = 1;
}

// Get name for selected category
$queryCategory = 'SELECT * FROM categories
                        WHERE categoryID = :category_id';
$statement1 = $db->prepare($queryCategory);
$statement1->bindValue(':category_id', $category_id);
$statement1->execute();
$category = $statement1->fetch();
$category_name = $category['categoryName'];
$statement1->closeCursor();

//Get all categories
$queryAllCategories = 'SELECT * FROM categories
                    ORDER BY categoryID';
$statement2 = $db -> prepare($queryAllCategories);
$statement2->execute();
$categories = $statement2->fetchAll();


//Get products fpr selected category
$queryProducts = 'SELECT * FROM products
               WHERE categoryID = :category_id
               ORDER BY productID';
 $statement3 = $db -> prepare($queryProducts);
 $statement3 -> bindValue(':category_id', $category_id);
 $statement3 -> execute();
 $products = $statement3 -> fetchAll();
 $statement3 ->closeCursor();
 ?>

<!DOCTYPE html>
<HTML>
   <head>
      <title>My Guitar Shop</title>
      <link rel="stylesheet" type="text/css" href="../main1.css"/>
   </head>
   <body>
       <header><h1>Product Manager</h1></header>
      <main>
          <hr>
         <h1>Product List</h1>
         <aside>
            <h2>Categories</h2>
            <nav>
               <ul>
                  <?php foreach ($categories as $category) : ?>
                  <li>    
                     <a href=".?category_id=<?php echo $category['categoryID']; ?>">    
                     <?php echo $category['categoryName'];?>
                     </a>
                  </li>
                  <?php endforeach; ?>
               </ul>
            </nav>
         </aside>
         <section>
            <!-- display a table of products -->
            <h2><?php echo $category_name; ?></h2>
            <table>
               <tr>
                  <th>Code</th>
                  <th>Name</th>
                  <th class="right">Price</th>
                  <th>&nbsp;</th>
               </tr>

               <?php foreach ($products as $product) : ?>

               <tr>
                  <td><?php echo $product['productCode']; ?></td>
                  <td><?php echo $product['productName']; ?></td>
                  <td><?php echo $product['listPrice']; ?></td>
                  <td><form action="delete_product.php" method="post">
                      <input type="hidden" name="product_id" value="<?php echo $product['productID']; ?>">
                      <input type="hidden" name="category_id" value="<?php echo $product['categoryID']; ?>">
                      <input type="submit" value="Delete">
                    </form></td>
                  </tr>
               <?php endforeach; ?>
            </table>
            <p><a href = "add_product_form.php">Add Product</a></p>
         </section>
      </main>
<hr>
      <footer><p>$copy; <?php echo date("Y"); ?> My Guitar Shop Inc</p></footer>
   </body>
</html>

delete_product.php的代码：

<?php

require_once('database.php');
$product_id= filter_input(INPUT_GET, 'product_id', FILTER_VALIDATE_INT);
$category_id= filter_input(INPUT_GET, 'category_id', FILTER_VALIDATE_INT);

//Delete the product from the datavase
if ($product_id != false && $category_id != false){
    $query = 'DELETE FROM products
            WHERE productID = :product_id';
    $statement = $db -> prepare($query);
    $statement -> bindValue(':product_id', $product_id);
    $success = $statement->execute();
    $statement -> closeCursor();
}

//Display the Product List Page
include('index.php');

?>

感谢您帮助我！我真的很感激！

Answer 1

您正在post方法中提交删除按钮。所以你必须在删除页面的post方法中接收这些值。只需在INPUT_GET

中的两行中将INPUT_POST更改为delete_product.php即可

$product_id= filter_input(INPUT_POST, 'product_id', FILTER_VALIDATE_INT);
$category_id= filter_input(INPUT_POST, 'category_id', FILTER_VALIDATE_INT);

而不是

$product_id= filter_input(INPUT_GET, 'product_id', FILTER_VALIDATE_INT);
$category_id= filter_input(INPUT_GET, 'category_id', FILTER_VALIDATE_INT);

Answer 2

你应该试试这个：

...
$product_id= filter_input(INPUT_POST, 'product_id', FILTER_VALIDATE_INT);
$category_id= filter_input(INPUT_POST, 'category_id', FILTER_VALIDATE_INT);
...

无法使用PHP从表中删除产品

2 个答案: