Array variable is not getting set - PHP Codeigniter - php

Question

I am trying to set array, but it is not getting set. Everytime the Buy function called, the array gets declared.
This is the function is controller.
public function buy() {
if($this->session->userdata('counter')){
$counter = $this->session->userdata('counter');
$this->session->set_userdata('counter', $counter + 1);
} else {
$this->session->set_userdata('counter', 1);
}
if(isset($bought)){
$name = $this->input->post('name');
$price = $this->input->post('price');
$qty = $this->input->post('qty');
$product = array('name' => $name, 'price' => $price, 'qty'=> $qty);
array_push($bought, $product);
var_dump($bought);
die();
} else {
$bought = array();
redirect("");
}
As you can see, it should remember that $bought is set, but it gets declared anew. For now I
tried to make it global, before "public function __construct()",
tried "if (!empty),
tried to put into session,
tried to find the answer across whole stackoverflow...
Please let me know if additional info needed.
Thanks a lot!

Answer 1

In your code when you are checking for $bought, it is not present so it is going to the else part everytime. Instead define a blank array and then set the values inside it. Try with -
if(isset($_SESSION['bought'])){
$name = $this->input->post('name');
$price = $this->input->post('price');
$qty = $this->input->post('qty');
$product = array('name' => $name, 'price' => $price, 'qty'=> $qty);
array_push($_SESSION['bought'], $product);
var_dump($_SESSION['bought']);
die();
} else {
$_SESSION['bought'] = array();
}
And start the session at top of the page.

Answer 2

I got it working.
I made a workaround with sgt's help, so now my code looks like this:
if($this->session->userdata('bought')){
$name = $this->input->post('name');
$price = $this->input->post('price');
$qty = $this->input->post('qty');
$product = array('name' => $name, 'price' => $price, 'qty'=> $qty);
// please see that here I just returned from old one and added new data to the old one.
// Then I just added the result to the session.
$old_session = $this->session->userdata('bought');
array_push($old_session, $product);
$this->session->set_userdata('bought', $old_session);
redirect("");
} else {
$this->session->set_userdata('bought', array());
}