使用 XAMPP 在本地主机上设置 $_SESSION 不起作用

问题描述

我在我的 PHP 代码中这样设置我的会话:$_SESSION['user_id'] = $login; 并且这在上传到我的服务器并跨不同页面时似乎工作正常，但是当我在本地机器上测试网站时，会话似乎在将脚本留在设置的位置后立即未设置.

I set my session like so in my PHP code : $_SESSION['user_id'] = $login; and this seems to work fine whilst uploaded to my server and carries across different pages, however when I am testing the website on my local machine the session seems to become immediately unset after leaving the script where it is set.

我正在使用 XAMPP 和完全相同的代码在我的本地机器上进行测试.

I am testing on my local machine using XAMPP and exactly the same code.

我不确定为什么会出现这个问题，非常感谢任何有用的答案.

I am not sure why this problem is occurring and would greatly appreciate any helpful answer.

$_SESSION['user_id'] = $login;
echo '<META HTTP-EQUIV="refresh" content="0;URL=../home.php">';  

编辑 1:

这是我登录的整个函数(它是课程的一部分):

EDIT 1:

Here is my entire function in which I log in (it's part of the class):

public function loggingIn(){
    session_start();

    $db = new Database('localhost','root','','userdata');
    $userFunctions = new Users($db);

    $username = $_POST['usernameInput'];
    $password = $_POST['passwordInput'];

    if(empty($username) || empty($password)){
        $this->errors['u&p'] = 'Please Enter Your Username AND Password';
        $this->printE();
    } elseif($userFunctions->user_exists($username)===false){
        $this->errors['nm'] = 'That Username/Password Combination Is Not Valid';
        $this->printE();
    } else {
            $login = $userFunctions->login($username, $password);

    if($login === false){
            $this->errors['nm'] = 'That Username/Password Combination Is Not Valid';
            echo 'Login Failed!';
        } else  {
           if(!$userFunctions->economyTableExistsForUser($login)){
               $userFunctions->createEconomyTableForUser($login);   
           }
           if(!$userFunctions->schoolTableExistsForUser($login)) {
               $userFunctions->createSchoolTableForUser($login);    
           }

               $_SESSION['user_id'] = $login;

               echo $_SESSION['user_id'];  // working fine

               header('Location: ../home.php');
        }
    }   
}

推荐答案

假设您的家用机器没有:

Let's guess that your home machine is not having:

session.autostart = On

在您的 php.ini 中，而您的另一台机器显然是.

in your php.ini, while your other machine obviously is.

确保您已在 PHP 代码中进行设置:

Make sure that you have set in your PHP code:

session_start();

PHP:session_start - 手册

如果你不这样做，那么你的会话就不会开始，除非我的第一个猜想是真的.

If you don't, then your session is not started, unless my first conjecture is true.

此外，您必须检查本地主机上的 PHP 版本和 php.ini 中的设置.确保存储会话文件的目录是可写的，并且会话文件确实存在.

Besides, you must check for you PHP version on your localhost and settings in php.ini. Make sure that the directory where you store you session files is writeable and session files do really exist.

最好使用 PHP 解决方案进行重定向:

You better use PHP solution for redirection:

header("Location: /");
exit();

编辑 2:

PHP 具有修改 HTTP 标头的函数.其中一些:

EDIT 2:

PHP has functions that modify HTTP headers. Some of them:

• 标题
• session_start
• setcookie

换行符和空格可能是一个问题，但也有不可见的字符序列会导致警告:无法修改标题信息，例如UTF-8 BOM(字节顺序标记).尝试重新保存您的文件，确保将其保存为 UTF-8(无 BOM).

Line-breaks and spaces could be a problem but there are also invisible character sequences which can cause Warning: Cannot modify header information, like the UTF-8 BOM (Byte-Order-Mark). Try re-saving your file making sure that it's saved just as UTF-8 (no BOM).

要正确调试您的代码，请确保 PHP 显示所有警告和通知.在会话开始之前运行它:

To properly debug your code make sure that PHP displays all warning and notices. Run it before session start:

ini_set('display_errors', -1);

编辑 5:

您还必须检查 session.gc_maxlifetime 设置:

session.gc_maxlifetime
session.gc_maxlifetime 指定数据将被视为垃圾"并被清理的秒数.垃圾收集发生在会话开始期间.

session.gc_maxlifetime
session.gc_maxlifetime specifies the number of seconds after which data will be seen as 'garbage' and cleaned up. Garbage collection occurs during session start.

编辑 6:

要在 Sublime Text 中查看空格，请编辑设置:

EDIT 6:

To view white-spaces in Sublime Text, edit the settings:

// Set to "none" to turn off drawing white space, "selection" to draw only the
// white space within the selection, and "all" to draw all white space
"draw_white_space": "selection",

您可以在 Preferences->Settings Default 中进行设置.如果您编辑用户设置 Preferences->Settings - User 并按以下方式添加行:

You can set it in Preferences->Settings Default. If you edit your user settings Preferences->Settings - User and add the line as per below:

{
    "font_size": 10,
    "draw_white_space": "all"
}

还要确保它显示所有其他特殊字符以正确调试您的代码！

Also make sure it shows all other special characters to properly debug your code!

最后尝试在重定向之前添加 session_write_close();.

Finally try adding session_write_close(); right before redirecting.

在您的 PHP 文件中设置，在 session_start(); 之前，session.save_path = "/home/username/tmp"; 指令.在 public_html 之外创建 tmp 目录.确保 tmp 目录具有 chmod 770 并使用相同的用户/组权限创建.在您的主目录中运行 ls -lsa 以检查新目录是否与其他目录具有相同的 user/group，例如 public_html.如果没有，请确保通过运行 chown username:groupname/home/username/tmp 来更改 tmp 上的 root 权限.

Set in your PHP file, before session_start();, session.save_path = "/home/username/tmp"; directive. Create tmp dir outside of public_html. Make sure that tmp dir has chmod 770 and created with the same user/group privileges . Run ls -lsa in your home dir to check if the new directory has the same user/group as other directories, like public_html for instance. If not, make sure changing permissions as root on tmp by running chown username:groupname /home/username/tmp.

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