convert XML to JSON using PHP/JQuery- response should be in JSON

All, i have to make a call to third party service where it will return the response in XML, due to that i am not able to access the XML. is there any way to convert the XML response to json so that i can use in my project

i have tried this but i don't want to hard code my response

// Given an XML string
def xml = '''<root>
            |    <node>Tim</node>
            |    <node>Tom</node>
            |    <node>
            |      <anotherNode>another</anotherNode>
            |    </node>
            |</root>'''.stripMargin()

// Parse it
def parsed = new XmlParser().parseText( xml )

// Deal with each node:
def handle
handle = { node ->
  if( node instanceof String ) {
      node
  }
  else {
      [ (node.name()): node.collect( handle ) ]
  }
}
// Convert it to a Map containing a List of Maps
def jsonObject = [ (parsed.name()): parsed.collect { node ->
   [ (node.name()): node.collect( handle ) ]
} ]

// And dump it as Json
def json = new groovy.json.JsonBuilder( jsonObject )

// Check it's what we expected
assert json.toString() == '{"root":[{"node":["Tim"]},{"node":["Tom"]},{"node":[{"anotherNode":["another"]}]}]}'

Help appreciated.