// contacts array will List everyone your contacts
// if the caller is known, then greet them by name
// otherwise, just identify them as another caller
if(!$name = $contacts[$_REQUEST['From']])
header("content-type: text/xml");
echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
<Say>Hello <?php echo $name; ?>.</Say>
<Gather numDigits="1" action="hello-world-handle-key.php" method="POST">
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