1. First convert your xml data into an object using simplexml_load_string() function .
$xml = simplexml_load_string($xmlData);
2. The simplexmlelement class provides a method called children() which provides the children of an element.
$arr = array();
foreach ($xml->children() as $r)
$t = array();
if (count($r->children()) == 0)
$arr[$r->getName()] = strval($r);
$arr[$r->getName()] = xml2array($r);
In the above function, count($r->children()) == 0 signifies that if the children count of a simplexmlelement object is 0 it can be taken as an empty node and shown as a string in the array.
$arr[$r->getName()] = strval($r) in this getName method gives the name of the tag; $r is a Simplexmlelement object and to get its value strval should be used.