php force download xml

I am creating an xml file on the fly. When a user generates this file I want it to open up a download file dialog with the content t开发者_StackOverflow社区hat was generated. There is no actual file because it is just generated through php. Any ideas on how to do this?

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This is what worked for me. In readfile('newfile.xml'); make sure to give the path of the file correctly. This php page is called from an html page with anchor tag which says - download:

<?php 
header('Content-disposition: attachment; filename="newfile.xml"');
header('Content-type: "text/xml"; charset="utf8"');
readfile('newfile.xml');
?>

source: How do I force the browser to download a file to disk instead of playing or displaying it?

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Send a content-disposition attachment header.

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header('Content-disposition: attachment; filename=advertise.xml');
header ("Content-Type:text/xml"); 
//output the XML data
echo  $xml;
 // if you want to directly download then set expires time
header("Expires: 0");