Check Referrer

function check_ref($site = 'etogre.com')
{
	if (!array_key_exists('HTTP_REFERER', $_SERVER))
		return false;
	
	$parse = parse_url($_SERVER['HTTP_REFERER']);
	$host = $parse['host'];
	$host = str_replace('www.', '', $host);
	
	return ($host == $site);
}