Question

当我单击提交按钮时，它不会更新数据库中的数据。我看了很多时候要弄清楚的问题是什么。我认为问题不在于代码。可能是因为XAMPP。我正在使用phpstorm，并且在两个文件中都给出了数据库连接。如果您需要其他信息，请告诉我。谢谢

“这是供应商列表文件”

<table class="table-bordered table-striped table-highlight text-center">
                <tr class="bg-dark text-white">
                    <th>Sid</th>
                    <th>Name</th>
                    <th>Contact</th>
                    <th>Action</th>
                </tr>
                <?php
                    $q = "SELECT * FROM supplier";
                    $result = mysqli_query($db, $q) or die(mysqli_error($db));
                    while ($row = mysqli_fetch_array($result))
                {
                ?>
                <tr>
                    <td data-toggle="modal" data-target="#<?php echo $row[0];?>"><?php echo $row[0]; ?></td>
                    <td data-toggle="modal" data-target="#<?php echo $row[0];?>"><?php echo $row[1]; ?></td>
                    <td data-toggle="modal" data-target="#<?php echo $row[0];?>"><?php echo $row[3]; ?></td>
                    <td>
                        <button id="action" class="btn-primary"><a href="update.php?id=<?php echo $row[0]; ?>"> update </a></button>
                        <button id="danger" class="btn-danger"><a href="delete.php?id=<?php echo $row[0]; ?>"> delete </a></button>
                    </td>
                </tr>
          </table>

“这是更新文件” 在第一个php标签的更新文件中，单击保存按钮将提交数据，并且应更新数据库中未发生的数据，这是主要问题。在第二个php标签中，代码实际上是正在获取数据表单数据库，并显示在texatbox中。

<?php
    include ('../../../includes/connection.php');
    ob_start();
    if (isset($_POST['save'])){
        $id = $_POST['id'];
        $newName = $_POST['newname'];
        $newAddress = $_POST['newaddress'];
        $newContact = $_POST['newcontact'];

        $q = "UPDATE supplier SET name='$newName', address='$newAddress', contact='$newContact' WHERE sid='$id' ";
        $result = mysqli_query($db, $q) or die(mysqli_error($db));
        header('location:viewSupplierList.php');
    }
    ob_end_clean();
?>

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Update</title>
    <link type="text/css" rel="stylesheet" href="../../../css/menu.css">
    <link type="text/css" rel="stylesheet" href="../../../css/hover.css">
    <link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet" media="all">
</head>

<body>
    <form class="form" method="POST" action="update.php">
        <h3>Update Supplier Details</h3>
        <?php
            if (isset($_GET['id'])){
                $id = $_GET['id'];
                $q = "SELECT * FROM supplier WHERE sid='$id'";
                $result1 = mysqli_query($db, $q) or die(mysqli_error($db));
                $row = mysqli_fetch_array($result1);
            }
        ?>

        <label for="id">ID</label>
        <input type="text" id="id" name="id" value="<?php echo $row[0];?>" disabled>
        <label for="name">Name</label>
        <input type="text" id="name" name="newname" value="<?php echo $row[1];?>" title="Enter at least 5 characters!" required pattern="[a-zA-Z ]{5,20}" oninvalid="this.setCustomValidity('Only alphabets are allowed!')" oninput="this.setCustomValidity('')">
        <label for="address">Address</label>
        <input type="text" id="address" name="newaddress" value="<?php echo $row[2];?>" title="Enter at least 10 characters!" required pattern="[a-zA-Z0-9- ]{10,100}" oninvalid="this.setCustomValidity('Only alphanumerics are allowed!')" oninput="this.setCustomValidity('')">
        <label for="contact">Contact</label>
        <input type="text" id="contact" name="newcontact" value="<?php echo $row[3];?>" title="Enter at least 12 number!" required pattern="[0-9-]{11,12}" oninvalid="this.setCustomValidity('Numbers with or without hyphen are allowed!')" oninput="this.setCustomValidity('')">

        <input class="hvr-bubble-float-top" type="submit" name="save" value="save">
        <input class="hvr-bubble-float-top" type="submit" name="cancel" value="cancel">
    </form>
</body>
<script type="text/javascript" src="../../../js/menu.js" ></script>
</html>

供应商表架构

sid|    name     |      address      | contact
--------------------------------------------------
 1 | Supplier A  | street abc blah.. | 038157575714
 2 | Supplier B  | street abc blah.. | 038157575714
 3 | Jhon        | street abc blah.. | 038157575714
 4 | Smith       | street abc blah.. | 038157575714
 5 | Michael     | street abc blah.. | 038157575714

Answer 1

所以这里的问题是，你已经禁用了ID输入。禁用字段时，不会将其发布。您更新查询接收空ID和存在不执行保存。您应该做的是使输入隐藏。

<label for="id">ID: <?php echo $row[0];?></label>
<input type="text" id="id" name="id" value="<?php echo $row[0];?>" style="display:none">

在侧没有，你真的应该使用的浏览器developper工具。发送POST / GET请求时，该请求将保存在“网络”标签中。您可以使用它在请求标头中查看提交的值，因此，您会看到id丢失了，这就是查询不起作用的原因;-）

数据不更新当我点击提交按钮

1 个答案: