Codeigniter中的怪异会话行为 [英] Weird session behaviour in codeigniter

问题描述

以下代码工作正常..

Following code works fine ..

$somearray = getData();

$data = array(
    'user_display_name' => $userdisplayname,
    'username'  => $usernamefromdb,
    'logged_in'  => TRUE,
);
$this->session->set_userdata($data); // used to create user session

此功能可与Codeigniter和sqlite一起使用。.

This works fine with codeigniter and sqlite..

但是当我编码

$data = array(
    'user_display_name' => $userdisplayname,
    'username'  => $usernamefromdb,
    'logged_in'  => TRUE,
    'arrdata' => $somearray
);

$this->session->set_userdata($data); // used to create user session

它表示会话已终止...可能是什么问题？

It says session terminated... What can be the issue?

当我执行 var_dump（$ somearray）时，它会显示信息。会话是否有内存限制？

When i do var_dump($somearray) it shows the info. Is there any memory limit for sessions??

谢谢

推荐答案

我在我的一个应用程序中也注意到了相同的问题。调试问题使我发现CodeIgniter没有正确实现多维数组的序列化/反序列化。实际上有一个为此提交的错误，我相信他们要么已将其修复，要么将要修复。看看他们在Core中的会话库。

I noticed the same issue in one of my applications too. Debugging the problem lead me to discover that CodeIgniter is (was) not properly implementing serialization/unserialization of multi-dimensional arrays. There was actually a bug submitted for that, and I believe they either fixed it or about to fix it. Take a look at the their session lib in Core.

function _serialize($data)
{
    if (is_array($data))
    {
        foreach ($data as $key => $val)
        {
            if (is_string($val))
            {
                $data[$key] = str_replace('\\', '{{slash}}', $val);
            }
        }
    }
    else
    {
        if (is_string($data))
        {
            $data = str_replace('\\', '{{slash}}', $data);
        }
    }

    return serialize($data);
}

请注意，它仅通过数组的1个级别，并且仅通过级别可以替换斜线。问题是您拥有多维数组，并且那里可能存在数据，这些数据无法进行序列化并清除会话。我们通过扩展其会话库并创建以下调用来解决此问题：

Notice that it only goes through 1 level of your array and that the ONLY level that gets the slashes replaced. The problem is that you have multi-dimensional array and there's probably data there that's throwing off serialization and wiping your session. We fixed it by extending their session library and creating these calls:

class MY_Session extends CI_Session {

    public function __construct()
    {
        parent::__construct();
    }

    function _serialize($data)
    {
        $data = $this->_serialize_backslash_recursive($data);

        return serialize($data);
    }

    function _unserialize($data)
    {
        $data = @unserialize(strip_slashes($data));

        return $this->_unserialize_backslash_recursive($data);
    }

    function _serialize_backslash_recursive($data)
    {

        if (is_array($data))
        {
            return array_map(array($this,'_serialize_backslash_recursive'), $data);
        }
        else
        {
            if (is_string($data))
            {
                return str_replace('\\', '{{slash}}', $data);
            }
        }

        return $data;

    }

    function _unserialize_backslash_recursive($data)
    {

        if (is_array($data))
        {
            return array_map(array($this,'_unserialize_backslash_recursive'), $data);
        }
        else
        {
            if (is_string($data))
            {
                return str_replace('{{slash}}', '\\', $data);
            }
        }

        return $data;

    }

}   

现在正确地通过所有级别。试试看，看看它是否适合您。

This will now go through all the levels properly. Give it a try and see if it works for you.

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