<?php

$file = 'images/map.pdf';
// fix for IE catching or PHP bug issue
header("Pragma: public");
header("Expires: 0"); // set expiration time
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
// browser must download file from server instead of cache
// force download dialog
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");

header("Content-Disposition: attachment; filename=" . basename($file) . ";");
header("Content-Transfer-Encoding: binary");
header("Content-Length: " . filesize($file));


@readfile($file);
exit(0);
?>