Someone could help me on the issue of referencing php files within the same project (calling classes) using "namespace","use" ( php v5.3 or higher) [My Screenshoot][https://i.stack.imgur.com/GpqTn.png
Fatal error: Class 'Zoho\CRM\Common\HttpClientInterface' not found in C:\root\zohocrm-master\src\Zoho\CRM\index.php on line 73
<?php namespace Zoho\CRM;
use Zoho\CRM\Common\HttpClientInterface;
use Zoho\CRM\Common\FactoryInterface;
use Zoho\CRM\Request\HttpClient;
use Zoho\CRM\Request\Factory;
use Zoho\CRM\Wrapper\Element;
.
.
.
public function __construct($authtoken, HttpClientInterface $client =null , FactoryInterface $factory = null )
{
$this->authtoken = $authtoken;
// Only XML format is supported for the time being
$this->format = 'xml';
$this->client = new HttpClientInterface();
$this->factory = $factory ;
$this->module = "Leads";
return $this;
}