Follow up: How to set attributes in Root and child in xml using php array?

This is follow up question of this

How to set attributes in root? Like this

 <Form xmlns="url" type="TextView" name="Form">

and set an attributes in the child?

In every child, there's different label, name, format, and type.

Like this...

 <Field name="Category" label="FormType" value="Test" type="TextView"/>
 <Field type="Delimiter"/>
 <Field name="ContractNumber" label="Contract number" value="3300000011" format="string"/>

Using this

  // creating object of SimpleXMLElement
 $xml_Form = new SimpleXMLElement("<?xml version=\"1.0\"?><Form></Form>");
 $Form= $xml_Form->createAttribute('xmlns', 'url');
 $Form=xml_Form ->addAttribute('label', 'Form');
 $Form=xml_Form ->addAttribute('type', 'TextView');
 $Form=xml_Form ->addAttribute('name', 'HomeVisitForm');
 $Field=$Form->addAttribute('type', 'normal');

  array_to_xml($Form,$xml_Form); // function call to convert array to xml
  print $xml_Form->asXML();     //saving generated xml file

 // function defination to convert array to xml
function array_to_xml($Form, &$xml_Form) {
$child = $xml_Form->addChild("Field");
foreach($Form as $key => $value) {
$child->addAttribute($key, $value);
}
     $var = (is_array($value))             
        ? array_to_xml($value, $xml_Form->addChild("$key"))
        : $xml_Form->addChild("$key","$value");
}
?>