iatitest.php

<?php 

$string = <<<XML
  <activity>
    <title>Test It</title>
    <location>
      <administrative adm1="South-East" adm2="Administrative unit not available"/>
      <coordinates latitude="-24.6545059954867" longitude="25.9085941314697" precision="1"/>
      <gazetteer-entry gazetteer-ref="933773">Gaborone</gazetteer-entry>
    </location>
  </activity>
XML;

$xml = simplexml_load_string($string);
$site = $xml->location;
echo $site->coordinates['latitude'], '<br>', $site->coordinates['longitude'], '<hr>';
echo $site->xpath('../title');

?>