Dynamic Sitemap PHP / XML - php

Question

I need a Dynamic Sitemap for my Dynamic PHP SQL Website, than I searched and followed a tutorial.
But when I submit it, there is an error:
"error on line 1 at column 6: XML declaration allowed only at the start of the document"
I search about ii and I realized that this is because of the short tags of PHP
But I can´t take the Short Tags Function off, because I use that in my whole website.
Then I need another solution;
That´s my code:
<?php
header('Content-type: application/xml; charset=UTF-8');
error_reporting(0);
include "connection.php";
$hoje = date('Y-m-d');
$output = '<?xml version="1.0" encoding="UTF-8"?>';
echo $output
?>
<urlset
xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9
http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">
// Here goes my Normal Sitemap //
// Here goes my Dynamic Sitemap //
<?php
$sql_tabela = mysql_query("SELECT * FROM imovel WHERE codigoImovel != '1' ORDER BY idImovel DESC");
$sql_tabela1 = mysql_query("SELECT * FROM prontomorar WHERE idPronto != '1' ORDER BY idPronto DESC");
$sql_tabela2 = mysql_query("SELECT * FROM construcao WHERE idConstrucao != '1' ORDER BY idConstrucao DESC");
?>
</urlset>
I tried to use that:
echo file_get_contents( "data.txt" );
with this content in "data.txt":
<?xml version="1.0" encoding="UTF-8"?>
But, this didn´t help me at all;
So, anyone can help me????

Answer 1

I discovered in another Forum how to solve it;
I have saved my file in a different type of file.
It should be just UTF-8 and I saved something else;
So, just save it as UTF-8 your PHP File;