Question

我已经完成了一个带有PDO和OOP的PHP登录广告注册脚本，所有工作但不是注销部分，似乎无法解决错误。请帮助我这个我没有太多关于php和mysql的知识，因为我还在学习..

索引页面是您登录站点以访问整个网站的页面，如果我注销该站点，则需要返回登录页面（index.php）

我收到的错误：

警告：调用USER :: __ construct（）时缺少参数1   C：\ wamp \ www \ hooked \ session.php在第6行并在中定义   第7行的C：\ wamp \ www \ hooked \ class.user.php

注意：未定义的变量：DB_con in   第9行的C：\ wamp \ www \ hooked \ class.user.php

警告：调用USER :: __ construct（）时缺少参数1   C：\ wamp \ www \ hooked \ logout.php在第4行并在中定义   第7行的C：\ wamp \ www \ hooked \ class.user.php

注意：未定义的变量：DB_con in   第9行的C：\ wamp \ www \ hooked \ class.user.php

警告：无法修改标头信息 - 已发送的标头   （输出从C：\ wamp \ www \ hooked \ class.user.php：7开始）   第70行的C：\ wamp \ www \ hooked \ class.user.php

致命错误：未捕获错误：调用未定义的方法   第12行的C：\ wamp \ www \ hooked \ logout.php中的USER :: doLogout（）（！）   错误：调用未定义的方法USER :: doLogout（）in   第12行的C：\ wamp \ www \ hooked \ logout.php

logout.php

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

if($user_logout->is_loggedin()!="")
{
    $user_logout->redirect('index.php');
}
if(isset($_GET['logout']) && $_GET['logout']=="true")
{
    $user_logout->doLogout();
    $user_logout->redirect('index.php');
}
?>

这是index.php

    <?php
require_once 'dbconfig.php';

if($user->is_loggedin()!="")
{
 $user->redirect('hooked_index.php');
}

if(isset($_POST['btn-login']))
{
 $uname = $_POST['txt_uname_email'];
 $umail = $_POST['txt_uname_email'];
 $upass = $_POST['txt_password'];

 if($user->login($uname,$umail,$upass))
 {
  $user->redirect('hooked_index.php');
 }
 else
 {
  $error = "Wrong Details !";
 }
}
?>

class.user.php

    <?php

class USER
{
    private $db;

    function __construct($DB_con)
    {
      $this->db = $DB_con;
    }

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

           $stmt = $this->db->prepare("INSERT INTO users(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 login($uname,$umail,$upass)
    {
       try
       {
          $stmt = $this->db->prepare("SELECT * FROM users WHERE user_name=:uname OR user_email=:umail LIMIT 1");
          $stmt->execute(array(':uname'=>$uname, ':umail'=>$umail));
          $userRow=$stmt->fetch(PDO::FETCH_ASSOC);
          if($stmt->rowCount() > 0)
          {
             if(password_verify($upass, $userRow['user_pass']))
             {
                $_SESSION['user_session'] = $userRow['user_id'];
                return true;
             }
             else
             {
                return false;
             }
          }
       }
       catch(PDOException $e)
       {
           echo $e->getMessage();
       }
   }

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

   public function redirect($url)
   {
       header("Location: $url");
   }

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

session.php文件

<?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('index.php');
    }
    ?>

这是登录hooked_index.php时所用的页面

<?php
include_once 'dbconfig.php';

if(!$user->is_loggedin())
{
 $user->redirect('hooked_index.php');
}
$user_id = $_SESSION['user_session'];
$stmt = $DB_con->prepare("SELECT * FROM users WHERE user_id=:user_id");
$stmt->execute(array(":user_id"=>$user_id));
$userRow=$stmt->fetch(PDO::FETCH_ASSOC);
?>

这只是注销“按钮”和用户名的显示：

<div class="nav navbar-right">
     <label><a href="logout.php?logout=true"><i class="glyphicon glyphicon-log-out"></i> logout</a></label>
     <br />
     Welcome : <?php print($userRow['user_name']); ?>
    </div>

Answer 1

您必须在User对象中传递$DBcon变量，

您需要更改 logout.php 代码，

$user_logout = new USER($DBCon);

因为你有，

function __construct($DB_con)
{
    $this->db = $DB_con;
}

在class.user.php

中

并替换hooked_index.php代码，

if(!$user->is_loggedin())
{
 $user->redirect('hooked_index.php');
}

有了这个，

if(!$user->is_loggedin())
{
 $user->redirect('index.php'); // or 'login.php'
}

在index.php中，从

更改代码

if($user->is_loggedin()!="")

要，

if($user->is_loggedin())

注销用户php和pdo时出错

1 个答案: