Sort object(SimpleXMLElement) php

Question

I\'m trying to find a way to sort my array from SimpleXMLElement. I\'d like to sort by start time which I can get from event_start_dt. I\'d also like to sort by room ID as a

Answer 1

I would just cast it as an array using this function (example function from php.net). But note that this will not sort the XML, rather sort the new array

/**
* function xml2array
*
* This function is part of the PHP manual.
*
* The PHP manual text and comments are covered by the Creative Commons 
* Attribution 3.0 License, copyright (c) the PHP Documentation Group
*
* @author  k dot antczak at livedata dot pl
* @date    2011-04-22 06:08 UTC
* @link    http://www.php.net/manual/en/ref.simplexml.php#103617
* @license http://www.php.net/license/index.php#doc-lic
* @license http://creativecommons.org/licenses/by/3.0/
* @license CC-BY-3.0 
*/
function xml2array ( $xmlObject, $out = array () )
{
  foreach ( (array) $xmlObject as $index => $node )
    $out[$index] = ( is_object ( $node ) ) ? xml2array ( $node ) : $node;

   return $out;
 }

and pass it the XMLObject

$arrTimes = xml2array(YourSimpleXMLElement);

and then use your original usort function on the new array

 function sortByTime($a, $b){
    $a = strtotime($a['event_start_dt']);
    $b = strtotime($b['event_start_dt']);
    if ($a==$b) 
       return 0;
    return ($a < $b) ? -1 : 1;
 }

Finally

usort($arrTimes, 'sortByTime');