Question

我正在尝试将会话变量存储在登录页面中，然后将其传递到成员页面，但由于某种原因，当您转到成员页面时，会话变量不会存储。

<?php
error_reporting(E_ALL ^ E_NOTICE);
session_start();
$userid = $_SESSION['userid'];
$username = $_SESSION['username'];

?>

然后是一堆html。然后下一个PHP代码是......

<?php

$form = "<form action='login.php' method='post'>
<table>
<tr>
<td><input type='text' name='user' /></td>
</tr>
<tr>
<td><input type='password' name='password' /></td>
</tr>
<tr>
<td><input type='submit' name='loginbtn' value='Login' /></td>
</tr>
</table>
</form>";

if ($_POST['loginbtn']) {
$user = $_POST['user'];
$password = $_POST['password'];

if ($user) {
    if ($password){
        require("connect.php");

        $password = md5(md5("kjfiufj".$password."GSA54"));
        //make sure login info is correct
        $query = mysql_query("SELECT * FROM users WHERE username='$user'");
        $numrows = mysql_num_rows($query);

        if ($numrows == 1) {
            $row = mysql_fetch_assoc($query);
            $dbid = $row['id'];
            $dbuser = $row['username'];
            $dbpassword = $row['password'];
            $dbactive = $row['active'];

            if ($password == $dbpassword) {
                if ($dbactive == 1) {
                //set session info
                    $_SESSION['userid'] = $dbid;
                    $_SESSION['username'] = $username;


                    echo "logged in as        <strong>$dbuser</strong>. <a href='member.php'>Click here</a> to go to the member page.";
                }
                else
                    echo "User not active";
            }
            else
                echo "Wrong password.";
        }
        else
            echo "The username you entered was not found";

        mysql_close();
    }
    else 
        echo "What's the password brah?";


}
else 
    echo "What's the user name brah?";



}
else 
    echo $form;
?>

会员页面的代码是

    <?php
error_reporting(E_ALL ^ E_NOTICE);
session_start();
$userid = $_SESSION['userid'];
$username = $_SESSION['username'];

?>

<?php
if ($username && $userid) {
    echo "Welcome <strong>$username</strong>,<a href='logout.php'>Logout</a>.";
}

else
    echo "Please login to acces this page <a href='login.php'>Login here</a>";



?>

Answer 1

您是否在登录页面中呼叫session_start()？

如果尚未将session_start()运行时配置选项设置为session.auto_start，则必须在将要访问会话变量的每个页面中调用true。

的修改

实际上，您的$_SESSION['userid']可能不是空的，因为您实际上已将定义的变量指定为$_SESSION['userid'] = $dbid;

但是，您要通过为$_SESSION['username']分配$username的值来创建$_SESSION['username'] = $username;，这似乎是未定义的。

也许

$_SESSION['username'] = $dbuser;

应该是

{{1}}

Answer 2

检查变量实际上是否包含某些内容

session_start();
$userid = $_SESSION['userid'];
$username = $_SESSION['username'];

?>

<?php
if (strlen($username) >0 && strlen($userid)>0) {
    echo "Welcome <strong>$username</strong>,<a href='logout.php'>Logout</a>.";
}

或检查会话变量是否已设置

session_start();
$userid = $_SESSION['userid'];
$username = $_SESSION['username'];

?>

<?php
if (isset($_SESSION['username']) && isset($_SESSION['userid'])) {
    echo "Welcome <strong>$username</strong>,<a href='logout.php'>Logout</a>.";
}

会话变量没有转移到成员页面

2 个答案: