PHP generate file for download then redirect

Question

I have a PHP app that creates a CSV file which is forced to download using headers. Here's the relevant part of the code:

header('Content-Type: application/csv'); 
header("Content-length: " . filesize($NewFile)); 
header('Content-Disposition: attachment; filename="' . $FileName . '"'); 
echo $content;
exit(); 

What I want is to redirect users to a new page after the file is built and the download prompt is sent. Can someone please help me with this?