Hidden downloads with PHP

Code to push downloads with custom name. Requires the fileinfo extension for the mime_content_type function..

PHP

$file = './files/'. $f;			
header('Content-Description: File Transfer');
header('Connection: Keep-Alive');
header("Cache-control: must-revalidate, post-check=0, pre-check=0");
header("Content-length: ". filesize($file));
header("Content-type: ". mime_content_type($file));
header("Content-disposition: attachment; filename=".$f.";");
set_time_limit(0);
while (ob_get_level()) 
	ob_end_clean();
exit(readfile($file));