php header base64 pdf
<?php
header("Pragma: public");
header("Expires: 0");
header("Accept-Ranges: bytes");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Content-Type: application/pdf");
header("Content-Disposition: attachment; filename=order.pdf");
header("Content-Transfer-Encoding: binary");
print base64_decode($res);