I need proper headers used to start download (show "Save as/Open" in browser). So far I've been using:
header("Content-type: application/force-download");
header("Content-disposition; filename=\"$filename\"");
header("Content-Length: " . filesize($file));
readfile($file);
In browse it works, but when trying fe.: download with DA (Download Accelerator) it wants to save it, not as $filename, but as srcipt's name instead (download.php).