Question

我的网站有问题，问题在于：当我尝试登录并输入正确的登录信息时，我一直被卡在process_login页面上并且标题不想将我重定向回索引页面...这只发生在我的网页上，在localhost上一切都很顺利.. 代码：

登录模式

<div class="modal fade" id="login" role="dialog">
                <div class="modal-dialog">
                    <div class="modal-content">
                        <center><div class="modal-header"> 
                             <button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button>   
                            <div class="alert alert-info">Login page</div>
                        </div></center>
                        <div class="modal-body">
                           <form role="form" action="process_login.php" method="post">
                            <div class="form-group">
                              <label for="exampleInputUsername">Username</label>
                              <input type="text" name="username" class="form-control" id="username_login" placeholder="Enter username"><span id="span_username_login"></span>
                            </div>
                            <div class="form-group">
                              <label for="exampleInputPassword1">Password</label>
                              <input type="password" name="password" class="form-control" id="password_login" placeholder="Password"><span id="span_password_login"></span><br/>
                            </div>
                               <a href="#recover" data-toggle="modal" ><p>I've forgotten my password</a></p>
                            <div class="modal-footer">
                            <center><input type="submit" name="submit" class="btn btn-danger" value="Sign in"/></center>
                         </div>
                            </form>
                    </div>   
                </div>
            </div>
            </div>

process_login.php页面

  <?php
require_once 'includes/initialize.php';
require_once 'classes/database.php';
require_once 'classes/bcrypt.php';
require_once 'classes/user.php';


    if(isset($_POST['submit']))
    {

            $username = filter_input(INPUT_POST, 'username' , FILTER_SANITIZE_STRING);
            $password = filter_input(INPUT_POST, 'password' , FILTER_SANITIZE_STRING);

            //if input fields ain't filled , redirecting back to index page
            if(empty($username) || empty($password))        
            {                                                       
                $_SESSION['emptyfields'] = '';
                header("Location: index.php");

            }
            //if that particular username doesnt exist in database , redirecting back                    to index page
            if($userclass->userExists($username) == false)
            {
                $_SESSION['usernamedoesntexist'] = '';
                header("Location: index.php");
            }
            //if that particular email isnt confirmed yet , redirecting back to index page
            if($userclass->emailConfirmed($username) == false)
            {
                $_SESSION['emailnotconfirmed'] = '';   
                header("Location: index.php");
            }
            if($userclass->banned($username) == false)
            {
               //if that particular username is banned , redirecting back to index page
               $_SESSION['banned'] = '';    
               header("Location: index.php");

            }    


            $login = $userclass->login($username, $password);
            if($login == false)
            {
                $_SESSION['errorwithlogin'] = '';       //incorect username - password combo
                header("Location: index.php");
            }
            else
            {
                $_SESSION['user_auth'] = TRUE;          //corect username - password combo
                $_SESSION['user_id'] =  $login;

                $_SESSION['loginsuccessfull'] = '';
                header("Location: index.php");

            }



    }
        else
        {
             $_SESSION['errorwithprocessing'] = '';
             header("Location: index.php");
        }    

?>
<?php
unset($_SESSION['errorwithprocessing']);
unset($_SESSION['loginsuccessfull']);
unset($_SESSION['errorwithlogin']);
unset($_SESSION['banned']);
unset($_SESSION['emailnotconfirmed']);
unset($_SESSION['usernamedoesntexist']);
unset($_SESSION['emptyfields']);
?>

class user.php页面（与登录有连接的行）

public function login($username, $password)
    {
        global $db;
        global $bcrypt;

        $stm = $db->connection->prepare("SELECT `user_id`,`password`  FROM `users` WHERE `username` = ?");    

        $stm->bindValue(1, $username);

        try
        {        
                    $stm->execute();
                    $data = $stm->fetch();      
                    $stored_password = $data['password'];       
                    $id = (int) $data['user_id'];   

                    if($bcrypt->verify($password, $stored_password) === true)           
                    {   
                        return $id;
                    }
                    else
                    {
                        return false;
                    }
        }
        catch(PDOException $e)
        {
            die($e->getMessage());
        }

    }

欢迎任何帮助，提前谢谢..

Answer 1

从我所看到的情况来看，我假设您在进入重定向代码之前正在开始会话。也许在你收录的一个文件中？无论如何，在调用header()之前，您需要调用所有session_start()函数。根据我的经验，不这样做会导致不可预测的结果，具体取决于我运行的PHP版本和服务器。

但是，我确实理解这并不总是一个选项，考虑到这一点，我使用以下代码作为header("Location:index.php")的解决方法;这将使用javascript进行重定向。

echo '<script type="text/javascript">window.location="index.php";</script>';

一遍又一遍地在流程页面上卡住（空白页面）

1 个答案: