<?php
class AdCode
{
	private $ad_code;
	private $var_name = 'ac';
	
	function __Construct()
	{
		// sets ad code - get var takes precedence (replaces) cookie
		if(isset($_COOKIE[$this->var_name]))
		{
			$this->ad_code = $_COOKIE[$this->var_name];
		}
		if(isset($_GET[$this->var_name]))
		{
			$this->ad_code = $_GET[$this->var_name];
			setcookie($this->var_name, $this->ad_code, time()+60*60*24*90, '/'); // 90 days - eventually would want a db lookup for expiry, and to even set the cookie
		}
		if(!isset($this->ad_code))
		{
			$this->ad_code = 0;
		}
	}
	
	function get_ad_code()
	{
		return($this->ad_code);
	}
}
?>