Dynamic Base URL Codeigniter 3.php

<?php
if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == "on"){
	$config['base_url'] = "https://".$_SERVER['HTTP_HOST'];
}else{
	$httphost = isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : "";
	if(isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == "https"){
		$config['base_url'] = "https://".$httphost;
	}else{
		$config['base_url'] = "http://".$httphost;
	}
}