<?php
 if(empty($_REQUEST['state'])) {
 echo "No State Sent";
 }
 else {
 $search = trim($_REQUEST['state']);
 $cities = array();
 switch($search) {
 case "MO" :
 $cities [] = array(
 'value' => 'kc',
 'title' => "Kansas City");
 $cities [] = array(
 'value' => 'stlou',
 'title' => "St. Louis");
 break;

 case "WA" : 
 $cities [] = array(
 'value' => 'seattle',
 'title' => "Seattle);
$cities [] = array(
 'value' => 'spokane',
 'title' => "Spokane");
$cities [] = array(
 'value' => 'olympia',
 'title' => "Olympia");
 break;

 case "CA" : 
$cities [] = array(
 'value' => 'sanfran',
 'title' => "San Francisco");
$cities [] = array(
 'value' => 'la',
 'title' => "Los Angeles");
$cities [] = array(
 'value' => 'web2',
 'title' => "Web 2.0 City");
 break;

 case "ID" : 
$cities [] = array(
 'value' => 'boise',
 'title' => "Boise");
 break;

 default : 
$cities [] = array(
 'value' => '',
 'title' => "No Cities Found");
 break;
 }

 header("Content-Type: text/xml; charset=utf-8");
 }

$doc = new DOMDocument();
$doc->formatOutput = true;

$r = $doc->createElement("cities");
$doc->appendChild($r);

 foreach( $cities as $city) {
$c = $doc->createElement("city");
$value = $doc->createElement("value");
$value->appendChild(
$doc->createTextNode($city['value']));
$c->appendChild($value);

$title = $doc->createElement("title");
$title->appendChild(
$doc->createTextNode($city['tittle']));

$c->appendChild($title);
$r->appendChild($c);
 }

 echo $doc->saveXML();
?>