php - fatal error :在第 24 行调用 C:\wamp\www\FINAL login\memberpage.php 中未定义的方法 PDO::fetch()

Question

我对这个错误真的很困惑 我已尽一切努力来解决此错误，但我无能为力 有人可以帮我吗

我正在尝试在 php 中显示 SQL 数据库中存储的所有值

    <?php
require('includes/config.php');
//if not logged in redirect to login page
if (!$user->is_logged_in()) {
    header('Location: login.php');
}
//define page title
$title = 'Members Page';
//include header template
require('layout/header.php');
?>
<div class="container">
    <div class="row">
        <div class="col-xs-12 col-sm-8 col-md-6 col-sm-offset-2 col-md-offset-3">
            <h2>Member only page - Welcome <?php echo $_SESSION['username']; ?></h2>
            <p><a href='logout.php'>Logout</a></p>
            <hr>
        </div>
    </div>
    <?php
    $result = $db->prepare("SELECT * FROM password");
    $result->execute();

    while ($row = $db->fetch(PDO::FETCH_ASSOC))
    {
    $title = $row['email'];
    $body = $row['pass'];
    }
    echo "<table>
    <tr>
    <th>Usernamw</th>
    <th>Password</th> 
      </tr>
  <tr>
    <td>" . $title . "</td>
    <td>" . $body . "</td> 
  </tr>
  </table>" ?>
</div>
<?php
//include header template
require('layout/footer.php');
?>

这是我收到错误的地方

    while ($row = $db->fetch(PDO::FETCH_ASSOC))

Answer 1

你混淆了你的变量/对象:

while ($row = $db->fetch(PDO::FETCH_ASSOC))

应该是

while ($row = $result->fetch(PDO::FETCH_ASSOC))

您必须获取结果，而不是连接。

编辑:要让所有行都得到回显，您必须将它们包含在 while 循环中:

echo "<table>
<tr>
    <th>Usernamw</th>
    <th>Password</th> 
</tr>";

while ($row = $result->fetch(PDO::FETCH_ASSOC))
{
    $title = $row['email'];
    $body = $row['pass'];
    echo "<tr><td>" . $title . "</td><td>" . $body . "</td></tr>";
}

 echo "</table>";