为什么我的PHP会话变量不起作用？

突然，我的PHP会话变量停止了存储。以前，它工作得很好，但是没有任何明显的变化，变量不再被存储

我尝试使用adminlogin.php上的代码来显示所有现有的会话变量，事实上，当使用登录表单时，它们没有被存储。重新加载页面后，它们将不再存储

我还创建了一个新文件random.php，其中存储了一个随机数到$\u SESSION['number']。完成后，我返回adminlogin.php，在该页面上填写表单，然后重新加载页面。同样，表单应该存储的会话变量不在会话数组中，但显示了随机数$\u session['number']

connect.php（标题）

adminlogin.php

<?php include 'connect.php';
    if($_SESSION['LoggedIn'] == 1)
{
        echo "Welcome back! You are: " . $_SESSION['StudentID'] . " " . $_SESSION['Row']['FirstName'] . " " . $_SESSION['Row']['LastName'] . "<br>";
    }

else{

if(!($_SERVER["REQUEST_METHOD"] == "POST")){
?>

<form action="adminlogin.php" method="POST">
    Password: <input type="password" name="password" autofocus="autofocus"><br>
    sharkcard ID: <input type="text" name="id"><br>
    <input type="submit">
</form>

<?php
}

else if(empty($_POST['id']) || empty($_POST['password'])){
    echo "You left something blank! Reload the page and try again.";
}

else {

    $id = ($_POST['id']);
    $password = md5($_POST['password']);
    $checklogin = $connection->query("SELECT * FROM students WHERE StudentID = '".$id."' AND AdminPassword = '".$password."' AND AdminPrivileges = 1");
    $num = mysqli_num_rows($checklogin);
    if(mysqli_num_rows($checklogin) == 1)
    {
        $row = mysqli_fetch_array($checklogin);

        $_SESSION['StudentID'] = $id;
        $_SESSION['Row'] = $row; // added
        $_SESSION['LoggedIn'] = 1;


        echo "<h1><font color=\"green\">Success</font></h1>";

        echo "<b>Account Information</b><br>" . $_SESSION['StudentID'] . " " . $_SESSION['Row']['FirstName'] . " ". $_SESSION['Row']['LastName'];

    }
    else
    {
        echo "<h1><font color=\"red\">Failure</font></h1>";
        echo "<p>Sorry, your account could not be found. Please reload and try again.</a>.</p>";
    }
}
}
?>

密码：

sharkcard ID:

我认为问题出在adminlogin.php的第2行
if（$\u会话['LoggedIn']==1）
如果（$loggedin）

---

另外，

$\u SESSION['LoggedIn']

和

$\u SESSION['StudentID']

都不是数组，所以您应该在connect.php第19行使用

isset（）

而不是

empty（）

。

为什么要使用MD5来存储密码？我希望你不要接受这个。

<?php include 'connect.php';
    if($_SESSION['LoggedIn'] == 1)
{
        echo "Welcome back! You are: " . $_SESSION['StudentID'] . " " . $_SESSION['Row']['FirstName'] . " " . $_SESSION['Row']['LastName'] . "<br>";
    }

else{

if(!($_SERVER["REQUEST_METHOD"] == "POST")){
?>

<form action="adminlogin.php" method="POST">
    Password: <input type="password" name="password" autofocus="autofocus"><br>
    sharkcard ID: <input type="text" name="id"><br>
    <input type="submit">
</form>

<?php
}

else if(empty($_POST['id']) || empty($_POST['password'])){
    echo "You left something blank! Reload the page and try again.";
}

else {

    $id = ($_POST['id']);
    $password = md5($_POST['password']);
    $checklogin = $connection->query("SELECT * FROM students WHERE StudentID = '".$id."' AND AdminPassword = '".$password."' AND AdminPrivileges = 1");
    $num = mysqli_num_rows($checklogin);
    if(mysqli_num_rows($checklogin) == 1)
    {
        $row = mysqli_fetch_array($checklogin);

        $_SESSION['StudentID'] = $id;
        $_SESSION['Row'] = $row; // added
        $_SESSION['LoggedIn'] = 1;


        echo "<h1><font color=\"green\">Success</font></h1>";

        echo "<b>Account Information</b><br>" . $_SESSION['StudentID'] . " " . $_SESSION['Row']['FirstName'] . " ". $_SESSION['Row']['LastName'];

    }
    else
    {
        echo "<h1><font color=\"red\">Failure</font></h1>";
        echo "<p>Sorry, your account could not be found. Please reload and try again.</a>.</p>";
    }
}
}
?>