modified codeigniter config file, useful to detect the server in http or https, especialy when the app is inside an iframe

config.php

$referer = isset($_SERVER['HTTP_REFERER']) ? parse_url($_SERVER['HTTP_REFERER']) : false;
$scheme = isset($referer['scheme']) ? $referer['scheme'] : 'http';

$config['base_url']  = $scheme.'://'.$_SERVER['HTTP_HOST'].'/';
$config['scheme_url'] = $scheme;

$config['asset_url'] = $config['base_url'].'assets/';

$config['index_page'] = ''; // empty it