Defining and working with global object for codeigniter controller - codeigniter

Question

Hello I am just working with Magento Soap clinet. And I'm creating lots function inside one controller and that's why I want to set $client and $session_id as global.
Here is my code-
<?php
// Turn off all error reporting
error_reporting(0);
//including SOAP client
require_once APPPATH.'third_party/client/soap_clinet.php';
//class Api
class Api extends CI_Controller{
//public variables
public $variable = "tree"; //working fine
//Defining $client object as following also creating error.
public $client = new SoapClient('http://localhost/mystore/index.php/api/?wsdl');
public $session_id;
public function _construct()
{
parent::_construct();
}
function index()
{
$data['title'] = "SOAP";
$data['heading'] = "Showing Magento SOAP connectiviy";
$this->load->view('apiview', $data);
}
//I need help for this function
function login(){
try{
$this->session_id = $this->client->login(
'fmniloy',
'abc123'
);
echo 'Connection complete: session id ='.$this->session_id;
}
catch (SoapFault $fault)
{
echo 'Fault Code: '.$fault->faultcode.'<br/>';
echo 'Fault Reason: '.$fault->faultstring;
}
} //login ends
function tree()
{
//it's printing global $variable successfully
echo $this->variable;
}
}
?>

Answer 1

Finally I got the solution.
First of all it's not possible to declare a object as public. We can pass $client object and $session_id to other functions. The solution is as following.
<?php
// Turn off all error reporting
error_reporting(0);
//including SOAP client
require_once APPPATH.'third_party/client/soap_clinet.php';
//class Api
class Api extends CI_Controller{
//public variable
public $remote_server = "http://localhost/mystore/index.php/api/?wsdl";
public $username = "fmniloy";
public $password = "abc123";
public function _construct()
{
parent::_construct();
}
function index()
{
$data['title'] = "SOAP";
$data['heading'] = "Showing Magento SOAP connectiviy";
$this->load->view('apiview', $data);
}
//Login to Server
function login(){
//login to Client Serve
$client = new SoapClient($this->remote_server);
try{
//filled with webservice username and passwd
$session_id = $client->login(
$this->username,
$this->password
);
//echo 'Connection complete: session id ='. $session_id;
}
catch (SoapFault $fault)
{
echo 'Fault Code: '.$fault->faultcode.'<br/>';
echo 'Fault Reason: '.$fault->faultstring;
}
//inputting $client object and $session_id to an array
$soap_vars = array($client, $session_id);
//return values to use in other functions
return $soap_vars;
}
//login ends
function tree()
{
$soap_vars = $this->login();
$result = $soap_vars[0]->call($soap_vars[1], 'catalog_category.tree');
echo '</br></br></br>Catagory Tree: ';
var_dump($result);
}
}
?>