how to create object of class in codeigniter - php

Question

Here is my core php code:
require('common/Client.php'); // include php wrapper class
require('common/GrantType/IGrantType.php');// include php wrapper class//
require('common/GrantType/AuthorizationCode.php'); // include php wrapper class//
const CLIENT_ID = '***********'; //generated from base_camp api//
const CLIENT_SECRET ='***********';
const REDIRECT_URI = '***********';
const AUTHORIZATION_ENDPOINT = 'https://launchpad.37signals.com/authorization/new';
const TOKEN_ENDPOINT = 'https://launchpad.37signals.com/authorization/token';
session_start();
$client = new OAuth2\my_class(CLIENT_ID, CLIENT_SECRET);
if (!isset($_GET['code']))
{
$_SESSION['org'] = $_GET['org'];
$auth_url = $client->getAuthenticationUrl(AUTHORIZATION_ENDPOINT, REDIRECT_URI);
header('Location: ' . $auth_url);
die('Redirect');
}
else
{
$params = array( 'type' => 'web_server', 'client_id' => CLIENT_ID, 'redirect_uri' => REDIRECT_URI, 'client_secret' => CLIENT_SECRET, 'code' => $_GET['code']);
$response = $client->getAccessToken(TOKEN_ENDPOINT, 'authorization_code', $params);
$client->setAccessToken($response['result']['access_token']);
$org = $_SESSION['org'].'_ess';
mysql_connect('localhost','root','*******') or die('Cannot connect to database !');
mysql_select_db($org) or die('No database found in mysql !');
$gcntct = mysql_query("select * from e_users");
}
How do I initialize object of another class in mvc, I have adopt new method by initialize new by namespace name and class its show non existing class error.
oath2 is namespace and client is library class name.
function a()
{
$this->library('client');
How do pass clientid and secret key in during object creation codeigniter as if you would see my core php code I have initialize object with new operator and pass values , so how could we initialize object of class client and namespace with passing values in constructor.
}
client.php lib
namesapce oath2
class client
{
public function __construct($client_id, $client_secret, $client_auth = self::AUTH_TYPE_URI, $certificate_file = null)
{
if (!extension_loaded('curl')) {
throw new Exception('The PHP extention curl must be installed to use this library.', Exception::CURL_NOT_FOUND);
}
$this->client_id = $client_id;
$this->client_secret = $client_secret;
$this->client_auth = $client_auth;
$this->certificate_file = $certificate_file;
if (!empty($this->certificate_file) && !is_file($this->certificate_file)) {
throw new InvalidArgumentException('The certificate file was not found', InvalidArgumentException::CERTIFICATE_NOT_FOUND);
}
}
}

Answer 1

Create a library in Codeigniter and load it.
See here and here