Question

注意：未定义的索引：第11行的E：\ xampp \ htdocs \ qrcodeee \ qrcodeee.php中的ID

注意：未定义的索引：第12行的E：\ xampp \ htdocs \ qrcodeee \ qrcodeee.php中的名称

注意：未定义的索引：第13行的E：\ xampp \ htdocs \ qrcodeee \ qrcodeee.php中的数字

通知：未定义的索引：第14行的E：\ xampp \ htdocs \ qrcodeee \ qrcodeee.php中的年份

我是通过从数据库中获取数据来生成qrcode的，但是当我单击qr code的下载按钮时，该属性声明为undefined。

       <form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" >
                <?php
include 'includes/connection.php';
$conn = OpenCon();
$sql = "select * from phonebook";
                        $result = mysqli_query($conn,$sql);
                        while ($row=mysqli_fetch_array($result))
                            { ?><!--open of while -->




                <span>ID:</span> <?php echo $row['id']; ?>
<span>Name:</span> <?php echo $row['Name']; ?>
<span>Number:</span> <?php echo $row['number']; ?>
<span>Class:</span> <?php echo $row['year']; ?>
                    <div class="form-group">
                        <input type="submit" name="submit" class="btn btn-primary submitBtn" style="width:20em; margin:0;" />
                    </div>
                    <?php
                               } //close of while
                            ?>
                </form>
                if(isset($_POST['submit']) ) {
    $tempDir = 'temp/'; 
    $id = $_POST['id'];
    $Name =  $_POST['Name'];
    $number =  $_POST['number'];
    $year =  $_POST['year'];
    $filename = getUsernameFromEmail($id);


    $codeContents = 'mailto:'.$id.'?id='.urlencode($id).'&Name='.urlencode($Name).'&number='.urlencode($number).'&year='.urlencode($year); 
    QRcode::png($codeContents, $tempDir.''.$filename.'.png', QR_ECLEVEL_L, 5);
}`

未定义的索引：

0 个答案: