Codeigniter - undefined index error when checking if session exists

Question

I'm getting a undefined index error when checking if a session exists. The error only occurs when a session does not exist.

Controller where the session is created:

$data = array(
                'email' => $this->input->post('email'),
                'is_logged_in' => TRUE
            );

$this->session->set_userdata($data);
redirect('site/index');

Controller where the check takes place:

$is_logged_in = $this->session->userdata['is_logged_in']; // error occurs here

if(!isset($is_logged_in) || $is_logged_in !== TRUE)
{
    $data['main_content'] = 'login_form';
    $this->load->view('includes/template', $data);
}

I've made sure the session library is loaded.

the exact error message is?

user6763587
– user6763587

2017-12-12 21:12:29 +00:00
Commented Dec 12, 2017 at 21:12 — user6763587
– user6763587, Commented Dec 12, 2017 at 21:12

whitwhoa · Accepted Answer · 2017-12-12 21:18:30Z

3

You are treating a method as an associative array. In codeigniter userdata is a function which returns the value of the index you pass it. So your line:

$is_logged_in = $this->session->userdata['is_logged_in'];

Should be:

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

answered Dec 12, 2017 at 21:18

whitwhoa

2,4994 gold badges36 silver badges63 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Goose · Accepted Answer · 2017-12-12 21:17:50Z

1

$this->session->userdata['is_logged_in'];

Should be

$this->session->userdata('is_logged_in');

The difference is () instead of [] because userdata is a function, not an array.

Per the documentation

Retrieving Session Data

answered Dec 12, 2017 at 21:17

Goose

4,8335 gold badges52 silver badges90 bronze badges

1 Comment

DFriend Over a year ago

An alternate way to get session data is with this syntax $this->session->is_logged_in; Which will return NULL if that key does not exist the same as occurs with $this->session->userdata('is_logged_in');

Collectives™ on Stack Overflow

Codeigniter - undefined index error when checking if session exists

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related