Question

我在页面之间携带会话值时遇到问题。

我为这个问题奋斗了3天。

帮助我克服这个问题。

index.php（登录页面）：

// initially declaring a variable with null value

!! include "conn.php";
   @session_start();
   if(isset($_SESSION['uname']))
   {
    $_SESSION['uname'] = " ";
   }
   else
   {
    $_SESSION['uname'] = " ";
   }
?>
//later assigning the value
$usrname = $_POST['uname'];
    $pass  = $_POST['pass'];
    $chk = mysqli_query($con,"select * from members WHERE username='$usrname'");
    while($value = mysqli_fetch_array($chk))
    {
        $realpassword = $value['password'];
        $_SESSION['uname'] = $_POST['uname'];
    }
    if(!isset($realpassword))
    {
        $realpassword  = "";
    }
    if($realpassword == $pass)
    {
         echo "<script>window.location.assign('dashboard.php');</script>";
    }

Dashboard.php（信息中心）：

// In dashboard

@session_start();
include "conn.php";
if(isset($_SESSION['uname'])&&$_SESSION['uname']!="")
{
$uname =$_SESSION['uname'];
}
else{
 echo "<script>window.location.assign('http://www.website.com');</script>";
}

/// This page working fine

在第3页：

/// Session value not carried into this page .. when this page loads automatically logouts and redirect into home page

session_start();
include "conn.php";
if(!isset($_SESSION['uname'])&&$_SESSION['uname']=="")
{
  echo "<script>window.location.assign('http://www.website.com');</script>";
}
$uname =$_SESSION['uname'];

Answer 1

您写道：

if(!isset($_SESSION['uname']) && $_SESSION['uname'] == "")
 {
 echo "<script>window.location.assign('http://www.website.com');</script>";
 }

应该是（或不是AND）：

if(!isset($_SESSION['uname']) OR $_SESSION['uname']==""){
    echo "<script>window.location.assign('http://www.website.com');</script>";
}

Answer 2

您的代码为伪代码

<强>的index.php：

1 start a session
2 if uname is set in session, set it to one space
3 otherwise, set it to one space

4 get data from db
5 if we have data, set uname in session to POST data uname

“第3页”中的

：

1 if uname is NOT set in session OR uname in session is empty string
2     logoff
3 otherwise 
4     proceed ...

根据另一个答案和2） - 3）在索引中，“第3页”中的条件1）永远不会成立。在信息中心内，您可能会看到因使用一个空格$_SESSION['uname']“删除”" "并检查空字符串""而导致的类似问题

更改index.php：

include "conn.php";
@session_start();

unset($_SESSION['uname']); // delete previous values unconditionally (!)

需要清除会话值，会话值不能进入另一个页面

2 个答案: