I'm using this to output a pdf document :
$response = new \Symfony\Component\HttpFoundation\Response(file_get_contents($thefile), 200, [
'Content-Description' => 'File transfer',
'Content-Disposition' => 'filename="' . $filename . '"',
'Content-Transfer-Encoding' => 'binary',
'Content-Type' => 'application/pdf',
]);
unlink($thefile);
$response->send();
In the generated page, the header title is the link to the page.
How can I customize the title ?