# <baby name="Morgan" gender="m">
#   <rank year="1890">375</rank>
#   <rank year="1900">410</rank>
#   ...
#   <rank year="2010">518</rank>
# </baby>

if (!isset($_GET["name"]) || !isset($_GET["gender"])) {
	header("HTTP/1.1 400 Invalid Request");
	die("You didn't pass a name and gender!");
}
$name   = $_GET["name"];
$gender = $_GET["gender"];

# rank.txt contains data about baby names, one per line
$lines = file("rank.txt", FILE_IGNORE_NEW_LINES);
foreach ($lines as $line) {
	# $line = "Aaron m 147 193 187 199 250 237 230 178 52 34 34 41 55"
	$tokens = explode(" ", $line);
	if ($tokens[0] == $name && $tokens[1] == $gender) {
		$dom = new DOMDocument();
		$root = $dom->createElement("baby");   # <baby name="Morgan" gender="m">...</baby>
		$root->setAttribute("name", $name);
		$root->setAttribute("gender", $gender);
		$dom->appendChild($root);
		
		$year = 1890;
		for ($i = 2; $i < count($tokens); $i++) {
			$rank = $dom->createElement("rank");   # <rank year="1890">375</rank>
			$rank->appendChild($dom->createTextNode($tokens[$i]));
			$rank->setAttribute("year", $year);
			$root->appendChild($rank);
			$year += 10;
		}
		
		header("Content-type: text/xml");
		print($dom->saveXML());
		break;
	}
}
?>