How to generate an XML file and immediately download it without saving it?

Question

PHP

There is an example that generates xml, saves it and then loads it.

$dom = new DomDocument('1.0');
$books = $dom->appendChild($dom->createElement('books'));
$book = $books->appendChild($dom->createElement('book'));
$title = $book->appendChild($dom->createElement('title'));
$title->appendChild(
$dom->createTextNode('Great American Novel'));
$dom->formatOutput = true; // установка атрибута formatOutput
$dom->save('test1.xml');
header('Content-type: text/xml');
header('Content-Disposition: attachment; filename="test1.xml"');

How to make sure that the file is not saved, but immediately after the generation, the download takes place. Perhaps it?

Answer 1

$dom = new DomDocument('1.0');
$books = $dom->appendChild($dom->createElement('books'));
$book = $books->appendChild($dom->createElement('book'));
$title = $book->appendChild($dom->createElement('title'));
$title->appendChild(
$dom->createTextNode('Great American Novel'));
$dom->formatOutput = true; // установка атрибута formatOutput

header('Content-Type: application/octet-stream');
echo $dom->saveXML();

Answer 2

function forceDownload($xml)
    {
    
        header("Pragma: public");
        header("Expires: 0");
        header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
        header("Cache-Control: private", false);
        header("Content-Type: application/xml");
        header("Content-Disposition: attachment; filename=" . basename($xml) . ";");
        header("Content-Transfer-Encoding: binary");
        header("Content-Length: " . filesize($xml));
        readfile($xml);
    }