迁移后 Codeigniter 会话不起作用 [英] Codeigniter Sessions not working after migration

问题描述

我有一个使用 CodeIgniter 3.1.6 构建的应用程序.我正在生产服务器上的子域上进行测试.我将主域指向文件夹，并将 config.php 中的 $base_url 更改为正确的 URL.(config.php 中的 $cookie_domain 从未设置过.)

I have an application built using CodeIgniter 3.1.6. I was carrying out testing on a subdomain on the production server. I pointed the main domain to the folder and also changed $base_url in config.php to the correct URL. ($cookie_domain within config.php has never been set.)

但是，会话数据现在不起作用.我尝试了一些测试，会话数据可以在一个控制器内设置和读取.

However, session data is now not working. I have tried some testing, the session data can be set and read within one controller.

$this->session->set_userdata('name', $name);
echo $this->session->userdata('name');

但是，这不适用于跨网址.例如:

However this doesn't work across URLs. For example:

// controllers/Contact.php
$this->session->set_userdata('name', $name); 

// controllers/Welcome.php
echo $this->session->userdata('name');

关于为什么这可能不适用于其他域的任何想法?

Any ideas as to why this may not work on a different domain?

推荐答案

有几个问题报告了 PHP 7.1 版和 CI 3.1.6 不支持 $this->session->set_userdata('name', $name);

There have been several issues reported for incompatibility of PHP version 7.1 and CI 3.1.6 not supporting $this->session->set_userdata('name', $name);

好吧，$this->session->set_userdata('name', $name); 有效，但函数 userdata() 只接受一个参数并期望它是一个字符串

well, $this->session->set_userdata('name', $name); works, but the function userdata() accepts only one argument and expects it to be a string

如果你查看会话库(/system/libraries/Session/Session.php)，你会发现近行

if you look into session library (/system/libraries/Session/Session.php), you'll find near row

747:

/**
 * Userdata (fetch)
 *
 * Legacy CI_Session compatibility method
 *
 * @param   string  $key    Session data key
 * @return  mixed   Session data value or NULL if not found
 */
public function userdata($key = NULL)
{
    if (isset($key))
    {
        return isset($_SESSION[$key]) ? $_SESSION[$key] : NULL;
    }
    elseif (empty($_SESSION))
    {
        return array();
    }

    $userdata = array();
    $_exclude = array_merge(
        array('__ci_vars'),
        $this->get_flash_keys(),
        $this->get_temp_keys()
    );

    foreach (array_keys($_SESSION) as $key)
    {
        if ( ! in_array($key, $_exclude, TRUE))
        {
            $userdata[$key] = $_SESSION[$key];
        }
    }

    return $userdata;
}

但是你也可以像这样使用原生 $_SESSION 来获取像 $name=array('firstname'=>'mr smith') 这样的数组:

but alternatively you can fetch an array like $name=array('firstname'=>'mr smith') with native $_SESSION like this:

设置:

$_SESSION['name']=$name; 

或

$this->session->set_userdata('name', $name);

获取:

echo $_SESSION['name']['firstname']; //etc..

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