// if env var is set and no session var, then not accepted
if (getenv('PHP_ckset') == true && !isset($_SESSION['foo'])){
	echo 'cookies not accepted';
}
// if env var isn't set, and no session var, then set env var, and session value
elseif (!getenv('PHP_ckset') && !isset($_SESSION['foo'])){
	$_SESSION['foo'] = true;
	putenv('PHP_ckset=true');
	header("Location: " . $_SERVER['PHP_SELF']);
	exit;
}
// else all is quiet on the eastern front
else{
	echo "cookies accepted";
}