How do i unset specified session

Question

I wonder how i unset a specified session.

$array = array(
                'Name' => 'Jhon',
                'Age' => '19',
                'Remark' => 'Tests'
            );
$this->session->set_userdata('registrasi',$array);

I know i can delete session with

$this->session->unset_userdata('registrasi');

How do i delete Remark ? so the last result will be like this.

 'Name' => 'Jhon',
 'Age' => '19'

Answer 1

You can use unset_userdata()

$this->session->unset_userdata()

In You case

$this->session->unset_userdata('Remark');

---

I tired this with an my own example. Check below

This is my session

$session = array(
    'id' => $result[0]['id'],
    'username'  => $name,
    'logged_in' => TRUE
);
$this->session->set_userdata($session);

Printing session

print_r($this->session->all_userdata());

Output

Array ( 
    [session_id] => 4cc6794ab4d1ee062e377945c92148dc 
    [ip_address] => ::1 
    [user_agent] => Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36 
    [last_activity] => 1464104585 
    [user_data] => 
        [id] => 1 
        [username] => Admin 
        [logged_in] => 1 
        [flash:new:success] => Welcome Admin 
) 

And im going to remove username from the above session

$this->session->unset_userdata('username');

And printing back

print_r($this->session->all_userdata());

Output

Array ( 
    [session_id] => 4cc6794ab4d1ee062e377945c92148dc 
    [ip_address] => ::1 
    [user_agent] => Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36 
    [last_activity] => 1464104585 
    [user_data] => 
        [id] => 1 
        [logged_in] => 1 
        [flash:new:success] => Welcome Admin 
    )

---

So this tested and works well