CodeIgniter adding session variable to an already defined "named session"

Question

I already created as session named "verified" as shown below (in my login controller): ``` foreach($result as $row) { $sess_array = array( 'id' => $row->memberid, //Session field: id. 'username' => $row->member_userunique //Session field: username. ); // Create a session with a name verified, with the content from the array above. $this->session->set_userdata('verified', $sess_array); } ``` Now, when a user open a page called book (with a controller named book) i want to add one more additional variable called "book_id" to my "verified" session. This is what i have done ``` function index() { //Add a new varible called book_id $this->session->set_userdata('book_id', $titleID); } ``` When i tried to retrieve the 'book_id' using the following method: ``` $session_data = $this->session->userdata('verified'); $article_id = $session_data['book_id']; $user_id = $session_data['id']; ``` It only able to retrieve the 'id' however the 'book_id' is not defined. But if do a var_dump() on $this->s…

Accepted Answer

You do as follows in your `index()` method:

```
$session_data = $this->session->userdata('verified');

$session_data['book_id'] = "something";

$this->session->set_userdata("verified", $session_data);
```

This way you retrieve the contents of the variable (i.e. the array that you persisted earlier), you add another key to the array (book_id), and then store it again. Now you will be able to do, as I assume you want to:

```
$sess = $this->session->userdata("verified");
echo $sess['book_id'];
```

CodeIgniter adding session variable to an already defined "named session"

Solution

Problem