how to store multiple products in add to carts using session in codeigniter-3 - codeigniter-3

Question

I want to add multiple product in SESSION when user click on add to cart button and how to fetch all product from SESSION using codeigniter...please help.
if ($_POST)
{
$sessionData = [
'p_id' => $this->input->post('pid'),
'p_name' => $this->input->post('pname'),
'p_qty' =>$this->input->post('viewproduct_details_qty'),
'p_price' => $this->input->post('pprice'),
'p_discount' => $this->input->post('pdiscount'),
'p_dprice' => $this->input->post('pdiscountprice'),
'p_imagename' => $this->input->post('pimagename'),
];
echo "<pre>";
print_r($sessionData);
$p_session = $this->session->set_userdata($sessionData);
//$this->load->view("add_to_cart_page_session");
}

Answer 1

Please Use Below code :
First You have to load session library in : config->autoload.php
$autoload['libraries'] = array('session'); // Load session Library in autoload.php
if ($_POST)
{
$sessionData = [
'p_id' => $this->input->post('pid'),
'p_name' => $this->input->post('pname'),
'p_qty' =>$this->input->post('viewproduct_details_qty'),
'p_price' => $this->input->post('pprice'),
'p_discount' => $this->input->post('pdiscount'),
'p_dprice' => $this->input->post('pdiscountprice'),
'p_imagename' => $this->input->post('pimagename'),
];
echo "<pre>";
print_r($sessionData);
$this->session->set_userdata('YOUR_SESSION_NAME',$sessionData); // You have to give session name
print_r($this->session->userdata('YOUR_SESSION_NAME')); // You Can Access Session by name
//$this->load->view("add_to_cart_page_session");
}