Question

你好伙伴们，我不知道为什么PHP会向我投掷，我相信我已经在我的文本中定义了它，但PHP认为不然。我收到以下错误

注意：未定义的变量：第23行的C：\ xampp \ htdocs \ wd1_vtec_0100348514 \ index.php中的消息

注意：未定义的变量：第32行的C：\ xampp \ htdocs \ wd1_vtec_0100348514 \ index.php中的消息

这是我的代码页面index.php ..

  <div class="masthead">

    <div class="sliding-car">
    <img src="main/img/subaru.jpg" alt="Subaru">
</div>
  </div>

  <hr>


  <div class="jumbotron">
    <p class="lead">Enter your Username & Password</p>

    <?php if(isset($_GET['message']))


    //Alert messages based on integers
    if($message == 1) {
    echo '
    <div class="alert">
      <button type="button" class="close" data-dismiss="alert">&times;</button>
      <strong>Invalid username or password</strong>
    </div>
    ';
    }

    else if($message == 2) {
    echo '
    <div class="alert alert-success">
      <button type="button" class="close" data-dismiss="alert">&times;</button>
      <strong>You have successfully logged out! </strong>
    </div>
    ';
    }

    ?>


    <form action="auth_check.php" method="post" class="form-signin">
    <h2 class="form-signin-heading">Please sign in</h2>
    <input name="username" type="text" class="input-block-level" placeholder="Username">
    <input name="password" type="password" class="input-block-level" placeholder="Password">    
    <button class="btn btn-large btn-primary" type="submit">Sign in</button>

  </form>


    <a class="btn btn-large btn-success" href="register.php">Register New User</a>
  </div>

<div class="sliding-car">
    <img src="main/img/subaruswag.png" alt="Subaru">
</div>

任何帮助都会有很大帮助！感谢!!!

Answer 1

您忘了将$_GET['message']分配给$message变量。

$message = $_GET['message'];

Answer 2

使用$ _GET [＆＃39; message＆＃39;]更改$ message或设置变量$ message。示例：$ message = $ _GET [＆＃39; message＆＃39;]

为什么PHP会向我显示此错误

2 个答案: