登录脚本无法在活服务器上工作

Question

我已经在我的localhost上为一个网站构建了一个管理部分，我一直在努力工作一段时间，一切正常，因为它应该在我的本地主机上，但是当我将它上载到活动服务器时，它只是不会工作 - 当我说不会工作，它不会做任何事情！登录页面应该会自动加载，如果我尝试访问index.php页面而未登录，它会将我重定向到login.php，因为它应该这样做，但是当我登录时，它只是重新加载登录页面，当我去注册时也是这样。

我已经花了整整一天的时间去了解每一个可能的错误，我可以想到，我已经加倍，然后三重检查了数据库连接，表格等，我回应了“你好世界！”从登录页面中包含的各种文件中查看它是否正确连接到它们，并且它每次都能正常工作......我甚至检查了服务器设置的时间，因为我在另一个论坛上读到某人正在类似的问题，他们更新服务器到正确的时间，它的工作，与会话有关......但唉，似乎没有任何工作。正如我之前提到的，它在我的本地主机上运行得非常好，而且我已经在一台运行正常的服务器上尝试过登录，但从此我已经完成了更多的工作。

供参考，这是我的登录/注册等类：

<?php 

class USER { 
private $db_user; 

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

public function register($clientID,$u_fname,$u_lname,$u_tel,$u_email,$uname,$upass,$secQuestion,$secAnswer) { 

    try { 

     $new_password = password_hash($upass, PASSWORD_DEFAULT); 

     $stmt = $this->db_user->prepare("INSERT INTO users(client_id,user,pass,first_name,last_name,telephone,email,sec_question,sec_answer) VALUES(:client,:user, :pass, :fname, :lname, :tel, :email, :secQ, :secA)"); 

     $stmt->bindparam(":user", $uname); 
     $stmt->bindparam(":client", $clientID); 
     $stmt->bindparam(":pass", $new_password); 
     $stmt->bindparam(":email", $u_email); 
     $stmt->bindparam(":fname", $u_fname); 
     $stmt->bindparam(":lname", $u_lname); 
     $stmt->bindparam(":tel", $u_tel); 
     $stmt->bindparam(":secQ", $secQuestion); 
     $stmt->bindparam(":secA", $secAnswer);   
     $stmt->execute(); 

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

public function login($uname, $upass) { 

    try { 

     $stmt = $this->db_user->prepare("SELECT * FROM users WHERE user=:user LIMIT 1"); 
     $stmt->execute(array(':user'=>$uname)); 
     $userRow=$stmt->fetch(PDO::FETCH_ASSOC); 
     if($stmt->rowCount() > 0) { 
      if(password_verify($upass, $userRow['pass'])) { 
       $_SESSION['user_session'] = $userRow['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 logout() { 
    session_destroy(); 
    unset($_SESSION['user_session']); 
    return true; 
} 
} 
?> 

我的配置文件：

<?php 

require('constants.php'); 

try { 
$db = new PDO("mysql:host=" . DB_SERVER . ";dbname=" . DB_NAME, DB_USER, DB_PASS); 
$db->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION); 
$db->exec("SET NAMES 'utf8'"); 
} catch (PDOException $e) { 
echo "Could not connect to the database because: " . $e->getMessage(); 
exit; 
} 

include_once 'class.user.php'; 
$user = new USER($db); 
?> 

和我的登录页面本身：

<?php 
session_start(); 
$page_title = "Love Deals Login"; 
require('../inc/connect/config.php'); 


if($user->is_loggedin()!="") { 
header("Location: index.php"); 
} 

if(isset($_POST['login'])) { 
$uname = $_POST['txt_uname']; 
$upass = $_POST['txt_upass']; 

if($user->login($uname,$upass)) { 
    header("Location: index.php"); 
} else { 
    $error = "Login failed. Please try again, or register"; 
} 
} 

include('inc/admin-header.php'); 

?> 

<div class="container" style="padding: 100px 0 0 0;"> 
<div class="form-container"> 
    <form method="post" id="login"> 
     <h3>Please login</h3> 
     <?php if(isset($error)) { ?> 
      <div class="alert alert-danger"> 
       <i class="glyphicon glyphicon-warning-sign"></i> &nbsp; <?php echo $error; ?> 
      </div> 
     <?php } else if(isset($_GET['joined'])) { ?> 
       <div class="alert alert-info"> 
        <i class="glyphicon glyphicon-ok"></i> &nbsp; Thanks! You are now registered. You may now login below 
       </div> 
     <?php } else if(isset($_GET['pass-update'])) { ?> 
       <div class="alert alert-info"> 
        <i class="glyphicon glyphicon-ok"></i> &nbsp; Success! Your password has been updated. You may now login below 
       </div> 
     <?php } ?> 
     <div class="form-group col-xs-12 col-sm-10 col-sm-offset-1 col-md-8 col-md-offset-2 col-lg-6 col-lg-offset-3 login"> 
      <input type="text" class="form-control" name="txt_uname" placeholder="Username" required /> 
     </div> 
     <div class="form-group col-xs-12 col-sm-10 col-sm-offset-1 col-md-8 col-md-offset-2 col-lg-6 col-lg-offset-3 login"> 
      <input type="password" class="form-control" name="txt_upass" placeholder="Password" required /> 
     </div> 
     <div class="clearfix"></div> 
     <div class="form-group col-xs-12 col-sm-10 col-sm-offset-1 col-md-8 col-md-offset-2 col-lg-6 col-lg-offset-3 login"> 
      <p class="small text">Forgotten <a href="forgot-user.php">Username</a>/<a href="forgot-pass.php">Password?</a></p> 
      <button type="submit" name="login" class="btn btn-primary pull-right"> 
       <i class="glyphicon glyphicon-log-in"></i>&nbsp;Login</button> 
     </div> 
     <div class="col-xs-12 col-sm-10 col-sm-offset-1 col-md-8 col-md-offset-2 col-lg-6 col-lg-offset-3" style="text-align: center;"> 
      <label>Don't have an account yet? <a href="agree.php">Register now</a></label> 
     </div> 
    </form> 
</div> 
</div> 
<?php include('inc/admin-footer.php'); ?> 

任何想法什么可以阻止我的脚本运行？或者甚至只是指向正确的方向，那将不胜感激！

Answer 1

尝试！empty（）而不是isset（）。