Php 无法在codeIgniter中使用Tank_auth的注销功能

我已经彻底搜索了这个问题，但没有找到答案，最后我发布了这个问题。登录，注册新用户，在Tank_auth中工作正常，但注销功能对我来说似乎不能正常工作

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Severity: Notice
Message: Undefined index: session_id
Filename: libraries/Session.php
Line Number: 272

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Severity: Notice
Message: Undefined index: ip_address
Filename: libraries/Session.php
Line Number: 272

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Severity: Notice
Message: Undefined index: user_agent
Filename: libraries/Session.php
Line Number: 272

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Severity: Notice
Message: Undefined index: last_activity
Filename: libraries/Session.php
Line Number: 272

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Severity: Notice
Message: Undefined index: session_id
Filename: libraries/Session.php
Line Number: 288

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Severity: Notice
Message: Undefined index: last_activity
Filename: libraries/Session.php
Line Number: 289

A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\CodeIgniter\system\core\Exceptions.php:185)
Filename: libraries/Session.php
Line Number: 675

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Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\CodeIgniter\system\core\Exceptions.php:185)
Filename: helpers/url_helper.php
Line Number: 542

有人告诉我修改auth controller function logout（）中的logout函数

它工作正常，但当我刷新页面时，它将我重定向回用户注销的前一页，然后我再次搜索，并将这一行修改为表单设置为unset_userdata。。。。。在tank_auth类中

this->ci->session->unset_userdata(array('user_id' => '', 'username' => '', 'status' => ''));

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这就是我到目前为止在等待帮助时所做的一切。

@StuartM击败了我edit@stuartM我还需要补充什么来澄清我的问题吗？

this->ci->session->unset_userdata(array('user_id' => '', 'username' => '', 'status' => ''));