Pass variable from one function to another - php

Question

HOw do I pass $variable from comments() to someFunction()?
class Blog extends CI_Controller {
public function index()
{
echo 'Hello World!';
}
public function comments()
{
$variable = "Hello";
}
public function someFunction()
{
echo $variable;
}
}
** EDIT ** Feel free to point out any other mistakes if you wish
class Home extends CI_Controller {
private $idArray;
function __construct()
{
parent::__construct();
$this->load->model('home_model');
$this->load->library('tank_auth');
$this->load->library('form_validation');
}
public function index() {
$home_data['initial_two'] = $this->home_model->get_two_brands();
$home_data['user_id'] = $this->tank_auth->get_user_id();
$home_data['username'] = $this->tank_auth->get_username();
$this->load->view('home_view', $home_data);
}
public function get_two() {
$get_results = $this->home_model->get_two_brands();
if($get_results != false){
$html = '';
foreach($get_results as $result){
$html .= '<li>'.$result->brand.'</li>';
}
list($result1, $result2) = $get_results;
$idOne = $result1->id;
$idTwo = $result2->id;
$this->idArray = array($result1->id, $result2->id);
//var_dump($this->idArray);
$result = array('status' => 'ok', 'content' => $html);
header('Content-type: application/json');
echo json_encode($result);
exit();
}
}//public function get_two() {
function user_pick() {
$this->form_validation->set_rules('pick', 'Pick', 'required|trim|integer|xss_clean');
$this->form_validation->set_rules('notPick', 'Not Pick', 'required|trim|integer|xss_clean');
//$arr = $this->idArray;
var_dump($this->idArray); // This is NULL
$pick = $_POST['pick'];
$notPick = $_POST['notPick'];
$user_id = $this->tank_auth->get_user_id();
if ($this->form_validation->run() == FALSE)
{
$result = array('status' => 'no', 'content' => "No good!");
header('Content-type: application/json');
echo json_encode($result);
exit();
}else{//if ($this->form_validation->run() == FALSE || $do_input == NULL)
$upload = $this->home_model->user_pick($user_id, $pick, $notPick);
$result = array('status' => 'ok', 'content' => "Thank you!");
header('Content-type: application/json');
echo json_encode($result);
exit();
}//if ($this->form_validation->run() == FALSE || $do_input == NULL)
}
}//class Home extends CI_Controller { closing bracket
/* End of file home.php */
/* Location: ./application/controllers/home.php */

Answer 1

class Blog extends CI_Controller {
public function index()
{
echo 'Hello World!';
}
public function comments()
{
$_SESSION['variable'] = Array('k1'=>'v1','k2'=>'v2') ;
// Store the variable in session so it can be called
// in another page or ajax call
}
public function display()
{
echo $_SESSION['variable'] ;
}
}
// my index.php file
var $blog = new Blog() ;
$blog->comments() ;
//another ajax_called.php file, call in ajax on in another browser tab
var $blog = new Blog() ;
$blog->display() ;