function fibonacci($x) {
	if ($x == 1 or $x == 2) return $x;
	else return fibonacci($x-1) + fibonacci($x-2);
}

$num = 1;
while (true) {
	$fib = fibonacci($num++);
	if ($fib >= 1000000) break;
	if ($fib % 2 == 0) $sum += $fib;
	print $sum . "\n";
}