PHP Decode

<?php 
 
    /************************************************************************ 
    *  
    * @name        ExApi 
    * @package     Exwos Framework Ex-External-Code 
    * @version     1.0.0 
    * @copyright   Copyright (c) 2016, Erik Hor 
    *  
    ************************************************************************/ 
     
class ExApi { 
	 
    private $_key; 
    private $account_id; 
     
	public function __construct($account_id, $key) 
	{ 
		if(!function_exists('curl_init')) 
		{ 
		    echo "Install 'curl_init'!!!"; 
        }else 
        { 
            require_once 'certificate.php'; 
            $this->_key = $key; 
            $this->account_id = $account_id; 
            $this->loader(); 
        } 
	} 
	 
	private function loader() 
    { 
        $post = array("account_id"=>$this->account_id,"secure"=>$this->_key);  
        $defaults = array(  
            CURLOPT_POST => 1,  
            CURLOPT_HEADER => 0,  
            CURLOPT_URL => 'https://dev-fw.exwos.com/get_connect',  
            CURLOPT_FRESH_CONNECT => 1,  
            CURLOPT_RETURNTRANSFER => 1,  
            CURLOPT_FORBID_REUSE => 1,  
            CURLOPT_TIMEOUT => 4,  
            CURLOPT_POSTFIELDS => http_build_query($post)  
        );  
        $ch = curl_init();  
        curl_setopt_array($ch, ($defaults));  
        if( ! $json = curl_exec($ch)) 
        { 
            trigger_error(curl_error($ch)); 
        }  
        curl_close($ch);  
        $ex_page = json_decode($json); 
        echo base64_decode($ex_page->ex->ex_loader); 
    } 
 
} ?>