<?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();
?>