INCOMPLETE – Parsing XML with SimpleXML and PHP

More reference: http://www.sitepoint.com/parsing-xml-with-simplexml/

Given the XML:

<Calendar>	
   <Account>	
      <Name>Sample Account Name</Name>	
      <Client>Test User</Client>	
   </Account>	
   <CalendarDates>	
      <CalendarDate>
         <Date>2014-03-01</Date>	
         <Events>	
            <Event>	
               <Name>Event Number One</Name>	
               <StartingAt>2014-03-01T09:30:00</StartingAt>	
               <Categories>General</Categories>	
            </Event>	
            <Event>	
               <Name>Another Event</Name>	
               <StartingAt>2014-03-01T09:30:00</StartingAt>	
               <Categories>Meeting</Categories>	
            </Event>	
            <Event>
               <Name>Hockey Game</Name>	
               <StartingAt>2014-03-01T10:00:00</StartingAt>	
               <Categories>Sports</Categories>	
            </Event>	
         </Events>	
      </CalendarDate>	
   </CalendarDates>	
</Calendar>

Perhaps this was entered into a textarea on a form and we have read it it into a variable. We can access the various data nodes using SimpleXML:

$oXML = new SimpleXMLElement($_POST['textarea_name']); // comes from our fictitious form

// We obtain the general account info (Name, Client) using
$AccountNode = $oXML->Account;

// This accesses the Calendar Dates Node. 
 $DatesNode = $oXML->CalendarDates;
echo '<ul>';
foreach($DatesNode->CalendarDate as $date){
    foreach($EventsNode->Event as $event){
       echo '<li>';
       echo date("g:i A",strtotime($event->StartingAt)) . "<br>";
       echo $event->Name . "<br>";
       echo $even->Categories;
       echo '</li>';
    }
}
echo '</ul>';

But what if we have to get the XML from somewhere else?

$durl = 'http://somelink.com/calendars/calendarname.xml';
$sXML = download_page($durl);
$oXML = new SimpleXMLElement($sXML);