foreach( $domNode -> childNodes as $node) {
if ( $node -> hasChildNodes() ) { json2xml( $node ); }
else {
 if ( $domNode -> hasAttributes() && strlen( $domNode -> nodeValue ) ) {
  $domNode -> setAttribute( "nodeValue", $node -> textContent );
$sub_array = array();
$sub_array["firstname"] = $node -> nodeValue = "";
$sub_array["lastname"] = $node -> nodeValue = "";
$sub_array["email"] = $node -> nodeValue = "";
$sub_array["username"] = $node -> nodeValue = "";
$sub_array["is_block"] = $node -> nodeValue = "";

$data[] = $sub_array;

}
}
}