Store variable and use it outside xpath code

I am using xpath to pare and pull certain data from a xml file.

<?php
$dom    = new DOMDocument();
$xpath  = new DOMXPath($dom);
$reader = new XMLReader();
$reader->open($xmlurl);

while ($reader->read()) {
    if ($reader->nodeType == XMLReader::ELEMENT && $reader->name == 'Hotel') {
        $node = $dom->importNode($reader->expand(), true);
        $dom->appendChild($node);
        $lat = $xpath->evaluate('string(self::Hotel[HotelCode = "'.$hotelCodes[1].'"]/Latitude)', $node);
        $dom->removeChild($node);
        if ($lat) {
            echo $lat;

        }
    }
}
?>

How can i store the $lat variable and echo it on another side of the page ?