want to create XML file using PHP

<?php

header("Content-Type: application/xml; charset=utf-8"); 

echo <<<EOS
<?xml version="1.0" encoding="UTF-8"?>
<doc>
  <!-- data here -->
</doc>
EOS;

?>

<?php
$filename = "newxmlfile";
$filetype = ".xml";
$filepath = "files/";
$file = $filepath.$filename.$filetype;
$input = "type your xml here";

$filehandle = fopen($file, 'w') or die("Failed to open" .$file. ".");
fwrite($filehandle, $input) or die("Failed to write to " .$file. ".");
fclose($filehandle);
echo "Success. " .$file. " was created.";
?>