Put the entire code where ever you want to display it.
Example.
<?php
$cws = new CodonWebService();
$xml = $cws->get('http://www.vacentral.net/airline/cva_canadianvirtualairlines/xml');
$xml = simplexml_load_string($xml);
echo "Our airline's rank is {$xml->rank}";
?>
Replace the VACentral URL with your VA's VACentral URL.