无法在codeigniter中更改会话值[重复]

问题描述：

This question already has an answer here:

Codeigniter modifying session data 3 answers

I use the session in codeigniter, it works well but I can't change the value. I use this function :

$this->session->set_userdata('check', 0);

I must change the value of 'check' to 0.

Why can't ?

My question is, why i can't change the value session ? And I set the value like this for the first time :

$sess_array = array(
        'userid' => $row->userid,
        'pseudo' => $row->pseudo,
        'check'  => $row->check
);  
$this->session->set_userdata('logged_in', $sess_array);

</div>

此问题已经存在这里有一个答案： p>

Codeigniter修改会话数据 3 answers span> li> \ r ul> div>

我在codeigniter中使用会话，它运行良好但我无法更改值。我使用此函数： p >

  $ this-＆gt; session-＆gt; set_userdata（'check'，0）; 
  code>  pre> 
 
 我必须更改 'check'的值为0.  p> 
 
 
为什么不能？ p> 
 
 
我的问题是，为什么我无法更改值会话？ 我第一次设置这样的值： p> 
 
 
  $ sess_array = array（
'userid'=＆gt; $ row-＆gt; userid，
'pseud  '=＆gt; $ row-＆gt; pseudo，
'check'=＆gt; $ row-＆gt; check 
）;  
 $ this-＆gt; session-＆gt; set_userdata（'logged_in'，$ sess_array）; 
  code>  pre> 
  div>

答

$sess_array = array(
    'userid' => $row->userid,
    'pseudo' => $row->pseudo,
    'check'  => $row->check
); 
// you have set session key 'logged_in' 
$this->session->set_userdata('logged_in', $sess_array);

// Get session value from existing key
$arrSession = $this->session->userdata('logged_in');
$arrSession['check'] = 0;
$this->session->set_userdata('logged_in', $arrSession);

You need to update value as shown above.

If you wish to set 'check' value as you indicated. you need to do as following

$sess_array = array(
    'userid' => $row->userid,
    'pseudo' => $row->pseudo,
    'check'  => $row->check
); 
// Note that no key specified. 
$this->session->set_userdata($sess_array);
// Now i think you can set check value. Give it a try. Let me know which works.
$this->session->set_userdata('check',0);

答

Can you try unsetting the value and then assign a new value to it, Something like the below code:

$check= $this->session->userdata('check');

if(!empty($check)){
  $this->session->unset_userdata('check');
  $this->session->set_userdata('check', 0);
}
echo $this->session->userdata('check');

Let me know if that works!!

无法在codeigniter中更改会话值[重复]

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