<?php
$res = false;
if ( in_array( $_GET['location'], array( "nashville", "charlottesville", "indianapolis", "dc" ) ) && ( $_GET['key'] == "nolen" ) )
    $res = true;

header( "Content-Type: application/json" );
header( "Cache-Control: no-cache, must-revalidate" );
header( "Expires: Sat, 26 Jul 1997 05:00:00 GMT" );
echo json_encode( $res );