PHP convert Array to XML

I have an array like so:

[0] => Array
        (
            [Project] => Array
                (
                    [ExternalProjectID] => 53
                    [ProjectName] => Doon Creek
                    [Location] => Array
                        (
                            [Address] => 123 Fake Street
                            [City] => Toronto
                            [Province] => ON
                            [Latitude] => 43.0000
                            [Longitude] =>  -80.0000
                        )

                    [Website] => http://www.website.com/our-communities.php?newcommunity=53
                    [ContactInformation] => Array
                        (
                            [ContactPhone] => 555-5555
                            [ContactEmail] => [e-mail]
                            [SalesOfficeAddress] => 123 Fake Street
                            [SalesOfficeCity] => Toronto
                            [SalesOfficeProvince] => ON
                        )

                )

        )

Now I am trying to covert this to XML exactly how this looks in the array, like Project should be a node with everything inside, Location should also be a node with everything inside the Location array inside that node, along with ContactInformation.

This is what I have:

$xml = new SimpleXMLElement();

$node = $xml->addChild('Projects');

array_to_xml($newArray, $node);

echo $xml->asXML();
die();

function array_to_xml($array, &$xml) {
    foreach($array as $key => $value) {
        if(is_array($value)) {
            if(!is_numeric($key)){
                $subnode = $xml->addChild("$key");
                array_to_xml($value, $xml);
            } else {
                array_to_xml($value, $xml);
            }
        } else {
            $xml->addChild("$key","$value");
        }
    }
}

but Project, Location and ContactInformation return as like so:

<Projects>
      <Project />
      <ExternalProjectID>53</ExternalProjectID>
      <ProjectName>Doon Creek</ProjectName>
      <Location />
      <Address>123 Fake St.</Address>
      <City>Toronto</City>
      <Province>ON</Province>
      <Latitude>43.0000</Latitude>
      <Longitude>-80.000</Longitude>
      <Website>http://www.website.com/our-communities.php?newcommunity=53</Website>
      <ContactInformation />
      <ContactPhone>555-5555</ContactPhone>
      <ContactEmail>[e-mail]</ContactEmail>
      <SalesOfficeAddress>123 Fake Street</SalesOfficeAddress>
      <SalesOfficeCity>Toronto</SalesOfficeCity>
      <SalesOfficeProvince>ON</SalesOfficeProvince>
      <Project />
</Projects>

My question is how do I fix my XML Output?

Answer

Almost had it! You simply had to pass the $subnode, not $xml into the recursive call of function:

// XML BUILD RECURSIVE FUNCTION
function array_to_xml($array, &$xml) {        
    foreach($array as $key => $value) {               
        if(is_array($value)) {            
            if(!is_numeric($key)){
                $subnode = $xml->addChild($key);
                array_to_xml($value, $subnode);
            } else {
                array_to_xml($value, $subnode);
            }
        } else {
            $xml->addChild($key, $value);
        }
    }        
}

// EXAMPLE ARRAY
$newArray = array(
                 "Project" =>
                  array("ExternalProjectID" => 53,
                        "ProjectName" => "Doon Creek",
                        "Location" => 
                         array ("Address" => "123 Fake Street",
                                "City" => "Toronto",
                                "Province" => "ON",
                                "Latitude" => 43.0000,
                                "Longitude" => -80.0000),
                        "Website" => 
                        "http://www.website.com/our-communities.php?newcommunity=53",
                        "ContactInformation" => 
                         array("ContactPhone" => "555-5555",
                               "ContactEmail" => "[e-mail]",
                               "SalesOfficeAddress" => "123 Fake Street",
                               "SalesOfficeCity" => "Toronto",
                               "SalesOfficeProvince" => "ON")
                       )
                );

// CREATING XML OBJECT
$xml = new SimpleXMLElement('<Projects/>'); 
array_to_xml($newArray, $xml);

// TO PRETTY PRINT OUTPUT
$domxml = new DOMDocument('1.0');
$domxml->preserveWhiteSpace = false;
$domxml->formatOutput = true;
$domxml->loadXML($xml->asXML());

echo $domxml->saveXML();

Output

<?xml version="1.0"?>
<Projects>
  <Project>
    <ExternalProjectID>53</ExternalProjectID>
    <ProjectName>Doon Creek</ProjectName>
    <Location>
      <Address>123 Fake Street</Address>
      <City>Toronto</City>
      <Province>ON</Province>
      <Latitude>43</Latitude>
      <Longitude>-80</Longitude>
    </Location>
    <Website>http://www.website.com/our-communities.php?newcommunity=53</Website>
    <ContactInformation>
      <ContactPhone>555-5555</ContactPhone>
      <ContactEmail>[e-mail]</ContactEmail>
      <SalesOfficeAddress>123 Fake Street</SalesOfficeAddress>
      <SalesOfficeCity>Toronto</SalesOfficeCity>
      <SalesOfficeProvince>ON</SalesOfficeProvince>
    </ContactInformation>
  </Project>
</Projects>