使用GET的未定义索引

Question

while($row=mysqli_fetch_assoc($result)){                        
echo "<tr>";
echo ('<td>'.$row['idNo'].'</td>');
echo ('<td>'.$row['FirstName'].'</td>');
echo ('<td>'.$row['LogId'].'</td>');
echo ('<td>'.$row['PassCode'].'</td>');                  
echo '<td><a href="edit.php?id=' . $row['idNo'] . '">Edit</a></td>';                    
echo '<td><a href="delete_contestant.php?id=' . $row['idNo'] . '">Delete</a></td>';                   
echo("</tr>");}

delete_contestant.php页面的代码如下。但是当我试图删除一个项目时

  

显示未定义的索引：第3行中的idNo

即使我正在尝试打印$_GET['idNo']，但它无效。

<?php
include('mysql_connect.php');
echo $_GET['idNo'];
if(isset($_GET['idNo']))
{
    $id=$_GET['idNo'];
    $sql="DELETE FROM addContestant WHERE idNo=$id";
    if(mysqli_query($conn,$sql))
    {
        echo "Item deleted";

    }
    else
        echo "There was a problem".mysqli_error($conn);
}
?>

Answer 1

您没有名为GET的{​​{1}}参数，它的ID

idNo

将您的代码更改为

echo '<td><a href="edit.php?id=' /* <<<< id, not idNo  */. $row['idNo'] . '">Edit</a></td>';                    

它应该有用。