How to put the photos items inside the XML using PHP and MYSQL

I am creating an XML generator that is working right, but I have reached the point where I have to insert the photos in xml and I do not know how to do it.

The "photos" tag should look like this:

<Fotos>
 <Foto>
  <URLArquivo>foto.jpg</URLArquivo>
 </Foto>
 <Foto>
  <URLArquivo>foto2.jpg</URLArquivo>
 </Foto>
</Fotos>

The photos are in another table of mysql, I have to make an inquiry inside another, that?

Below is my file (I just let the ID tag not leave a big code here):

$query = "
SELECT p.*, c.category_name, s.state_name, ct.city
FROM alk_osrs_properties p
LEFT JOIN (SELECT category_id, pid FROM alk_osrs_property_categories) pc ON pc.pid = p.id
LEFT JOIN (SELECT category_name, id FROM alk_osrs_categories) c ON c.id = pc.category_id
LEFT JOIN (SELECT state_name, id FROM alk_osrs_states) s ON s.id = p.state
LEFT JOIN (SELECT city, id FROM alk_osrs_cities) ct ON ct.id = p.city
";
$imoveisArray = array();
if ($result = $mysqli->query($query)) {
    while ($row = $result->fetch_assoc()) {
       array_push($imoveisArray, $row);
    }
    if(count($imoveisArray)){
         createXMLfile($imoveisArray);
     }
    $result->free();
}
$mysqli->close();
function createXMLfile($imoveisArray){
   $filePath = 'arquivo.xml';
   $dom     = new DOMDocument('1.0', 'utf-8'); 
   $root      = $dom->createElement('Imoveis'); 
   for($i=0; $i<count($imoveisArray); $i++){   
//INICIO DAS VARIAVEIS
     $imovelId        =  $imoveisArray[$i]['id']; 
$imovel = $dom->createElement('Imovel');

     $id     = $dom->createElement('CodigoImovel', $imovelId); 
     $imovel->appendChild($id);
$root->appendChild($imovel);
   }
   $dom->appendChild($root); 
   $dom->save($filePath); 
 } 

The photos are in the table alk_osrs_photos, in the structure below, where pro_id is the main id of the property: id | pro_id | image

1 | 10   |foto.jpg
2 | 10   |foto2.jpg