注意：未定义索引：第 12 行 C:\xampp\htdocs\home_teacher_upload.php 中的 video_code [重复]答案

【问题标题】：Notice: Undefined index: video_code in C:\xampp\htdocs\home_teacher_upload.php on line 12 [duplicate]注意：未定义索引：第 12 行 C:\xampp\htdocs\home_teacher_upload.php 中的 video_code [重复]
【发布时间】：2017-01-13 20:53:03
【问题描述】：

嗨，所以我一直遇到这个错误，我想知道如何解决它！这非常重要，因为这个项目是针对学校学位的。

这个表单基本上是用来上传youtube嵌入代码并在另一个页面调用它们的！我正在使用strip_tags，但它似乎不起作用，因为它表示$video_title和$video_code都未定义变量。所以这是我第一次打开页面时的样子：http://imgur.com/a/hTsW7 这是我点击提交按钮的时候： http://imgur.com/a/ToVV8 我知道它是重复的，但我已经尝试了很多在这里找到的选项，但似乎没有一个有效！我试过 isset(); ，我尝试了 $_POST[] 但没有更好的结果。我还尝试更改整个注册和登录表单但仍然没有！这些错误是什么以及为什么我是 PHP 新手，很抱歉解释不好！

这是 home_teacher_upload.php ：

<?php

require_once("session.php");
require_once("class.user.php");

$teacher = new USER();

if(isset($_POST['btn-submit']))
{
   $video_title = strip_tags($_GET['video_title']);
   $video_code = strip_tags($_GET['video_code']);

  if ($video_title == "") {
    $error[]="Duhet të vendosni titullin fillimisht!";
  }
    echo "<h3>Videoja u ngarkua me sukses!</h3>";
  }
   try {
        $stmt = $teacher->runQuery("SELECT video_title, video_code FROM videos WHERE video_title=:video_title OR video_code=:video_code");
      $stmt->execute(array(':video_title'=>$video_title, ':video_code'=>$video_code));
      $row=$stmt->fetch(PDO::FETCH_ASSOC);

      if($row['video_title']==$video_title) {
        echo "<h3>Ky titull është jo valid!</h3>";
      }
      else if($row['video_code']==$video_code) {
        $error[] = "Kjo video aktualisht është e ngarkuar";
      }
      else
      {
        $teacher->submit_video($video_title,$video_code);  
               }
      } 

      catch (PDOException $e) {

          echo $e->getMessage();   

      }





?>
<link href="img/favicon.png" rel="shortcut icon" />
<!DOCTYPE html>
<head>
<link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Cookie">
<link rel="stylesheet" href="css/user.css">
<link rel="stylesheet" href="bootstrap/fonts/font-awesome.min.css">
<link href="https://fonts.googleapis.com/css?family=Fjalla+One" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Patua+One" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Bree+Serif" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Anton" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Hammersmith+One" rel="stylesheet">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link href="css/bootstrap.min.css" rel="stylesheet" media="screen">
<link href="css/bootstrap-theme.min.css" rel="stylesheet" media="screen">
<script type="text/javascript" src="jquery-1.11.3-jquery.min.js"></script>
<link rel="stylesheet" href="style.css" type="text/css"  />
<link rel="stylesheet" type="text/css" href="css/user.css">
<title>Ngarkoni video!</title>
</head>
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>

<body>

<nav class="navbar navbar-default navbar-fixed-top">
      <div class="container">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
          <a class="navbar-brand" style="
          font-family: Bree Serif;">IB-Learning </a>
        </div>
        <div id="navbar" class="navbar-collapse collapse">
          <ul class="nav navbar-nav navbar-right">

            <li class="dropdown">
              <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
              <span class="glyphicon glyphicon-user"></span>&nbsp;&nbsp;<span class="caret"></span></a>
              <ul class="dropdown-menu">
                <li><a href="profile.php"><span class="glyphicon glyphicon-user"></span>&nbsp;Profili</a></li>
                <li><a href="logout.php?logout=true"><span class="glyphicon glyphicon-log-out"></span>&nbsp;Dilni</a></li>
              </ul>
            </li>
          </ul>
        </div><!--/.nav-collapse -->
      </div>
    </nav>


    <div class="clearfix"></div>

<div class="container-fluid" style="margin-top:80px;">


</div>
<div class="wanna" style="text-align: center;">
<h3 style="font-family: Hammersmith One;">Ngarkoni një video</h3></div>
<div class="form" style="text-align: center;     margin-left: 431px;
    padding-top: 13px;">
<form class="submit_video" method="POST" style="text-align: center;">

  <div class="form-group" style="font-family: Bree Serif; width: 28%;">
            <input type="text" class="form-control" name="video_title" required placeholder="Titulli i videos" style="text-align: center;"/>
        </div>

  <div class="form-group" style="font-family: Bree Serif;margin-left: -37px;">
            <textarea name="video_code" class="form-control" style="width: 240px; margin: 0px 337px 0px 0px; height: 165px; text-align: center;" form="code" placeholder="Embed code i videos" required="true"></textarea>
        </div>

<div class="button_form-group">
              <button type="submit" class="btn btn-primary" style="margin-right: 415px;font-family: Bree Serif;" name="btn-submit">
                  Submit
                </button>
            </div>
</form>
</div>



<?php include('footer.php');?>
<script src="bootstrap/js/bootstrap.min.js"></script>
<style type="text/css">
  h3{
    font-family: Bree Serif;
    text-align: center;
    padding-left: 20px;
  }
</style>
</body>
</html>

这是 session.php：

<?php

    session_start();

    require_once 'class.user.php';
    $session = new USER();

    // if user session is not active(not loggedin) this page will help 'home.php and profile.php' to redirect to login page
    // put this file within secured pages that users (users can't access without login)

    if(!$session->is_loggedin())
    {
        // session no set redirects to login page
        $session->redirect('login.php');
    }

这是 class.user.php ：

<?php

require_once('dbconfig.php');

class USER
{   

    private $conn;

    public function __construct()
    {
        $database = new Database();
        $db = $database->dbConnection();
        $this->conn = $db;
    }

    public function runQuery($sql)
    {
        $stmt = $this->conn->prepare($sql);
        return $stmt;
    }


    public function register($uname,$umail,$upass)
    {
        try
        {
            $new_password = password_hash($upass, PASSWORD_DEFAULT);

            $stmt = $this->conn->prepare("INSERT INTO tik_students(user_name,user_email,user_pass) 
                                                       VALUES(:uname, :umail, :upass)");

            $stmt->bindparam(":uname", $uname);
            $stmt->bindparam(":umail", $umail);
            $stmt->bindparam(":upass", $new_password);

            $stmt->execute();   

            return $stmt;   
        }
        catch(PDOException $e)
        {
            echo $e->getMessage();
        }               
    }
    public function register_teacher($t_uname,$t_umail,$t_upass)
    {
        try
        {
            $new_password = password_hash($upass, PASSWORD_DEFAULT);

            $stmt = $this->conn->prepare("INSERT INTO tik_teachers(user_name,user_email,user_pass)
                                                       VALUES(:uname, :umail, :upass)");

            $stmt->bindparam(":uname", $t_uname);
            $stmt->bindparam(":umail", $t_umail);
            $stmt->bindparam(":upass", $t_new_password);                              

            $stmt->execute();   

            return $stmt;   
        }
        catch(PDOException $e)
        {
            echo $e->getMessage();
        }               
    }

    public function doLogin($uname,$umail,$upass)
    {
        try
        {
            $stmt = $this->conn->prepare("SELECT user_id, user_name, user_email, user_pass FROM tik_students WHERE user_name=:uname OR user_email=:umail ");
            $stmt->execute(array(':uname'=>$uname, ':umail'=>$umail));
            $userRow=$stmt->fetch(PDO::FETCH_ASSOC);
            if($stmt->rowCount() == 1)
            {
                if(password_verify($upass, $userRow['user_pass']))
                {
                    $_SESSION['user_session'] = $userRow['user_id'];
                    return true;
                }
                else
                {
                    return false;
                }
            }
        }

        catch(PDOException $e)
        {
            echo $e->getMessage();
        }
    }

    public function doLogin_teacher($t_uname,$t_umail,$t_upass)
    {
        try
        {
            $stmt = $this->conn->prepare("SELECT user_id, user_name, user_email, user_pass FROM tik_teachers WHERE user_name=:uname OR user_email=:umail ");
            $stmt->execute(array(':uname'=>$t_uname, ':umail'=>$t_umail));
            $userRow=$stmt->fetch(PDO::FETCH_ASSOC);
            if($stmt->rowCount() == 1)
            {
                if(password_verify($t_upass, $userRow['user_pass']))
                {
                    $_SESSION['user_session'] = $userRow['user_id'];
                    return true;
                }
                else
                {
                    return false;
                }
            }
        }
        catch(PDOException $e)
        {
            echo $e->getMessage();
        }
    }

        public function submit_video($video_title,$video_code)
    {
        try
        {

            $stmt = $this->conn->prepare("INSERT INTO videos(video_title, video_code) 
                                                       VALUES(:video_title, :video_code)");

            $stmt->bindparam(":video_title", $video_title);
            $stmt->bindparam(":video_code", $video_code);       

            $stmt->execute();   

            return $stmt;   
        }
        catch(PDOException $e)
        {
            echo $e->getMessage();
        }               
    }


    public function is_t_loggedin()
    {
        if(isset($_SESSION['user_session']))
        {
            return true;
        }
    }


    public function is_loggedin()
    {
        if(isset($_SESSION['user_session']))
        {
            return true;
        }
    }
    public function redirect($url)
    {
        header("Location: $url");
    }

    public function doLogout()
    {
        session_destroy();
        unset($_SESSION['user_session']);
        return true;
    }
}

?>

我们将不胜感激

【问题讨论】：

我也确实看到了，并尝试了那里的选项，但它们不起作用！
您在 home_teacher_upload.php 页面上收到的 URL 是什么？
网址????????
@AvniBeka URL 是 Uniform Resource Locator。查看 URL 或使用 var_dump($_GET); 检查您在 $_GET superglobal 中获得的内容。
它说数组 = 0;

标签： php mysql database pdo

【解决方案1】：

注意：未定义的索引/未定义的偏移量

当您（或 PHP）尝试访问未定义的索引时会出现此通知一个数组。

您需要先检查如下

if(isset($_GET['video_code'])){

}

所以你的情况

$video_code = isset($_GET['video_code']) ? strip_tags($_GET['video_code']): ' ';

在访问之前检查索引是否存在。

为此，您可以使用

isset()

或

array_key_exists():

//isset()
$video_code = isset($_GET['video_code']) ? strip_tags($_GET['video_code']): '';

// OR

//array_key_exists()
$video_code = array_key_exists('video_code',$_GET) ? strip_tags($_GET['video_code']): '';

【讨论】：

我不明白该怎么做！
所以在 'my_index' 我应该把变量名放在里面？
@AvniBeka 不只是例子，见上面的更新
是的，所以我的实际代码是 strip_tags($_POST['video_title']);我应该使用您在那里编写的代码并将 my_index 替换为 video_title
这里您需要了解的基本内容是您正在尝试访问未定义索引的数组元素，这就是我们首先使用 isset() 函数进行验证的原因