<?php
// downloading a file use http://somewhere.com/download.php/?filename=name of file
 
$filename = $_GET['filename'];
 
if(!$filename){ echo "ERROR: No filename specified. Please try again."; }
else {
 
// 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");
 
// use the Content-Disposition header to supply a recommended filename and 
// force the browser to display the save dialog. 
header("Content-Disposition: attachment; filename=".basename($filename).";");
 
header("Content-Transfer-Encoding: binary");
 
$root_path = "root path to image";
 
$myfile = $root_path . $filename;
 
header("Content-Length: ".filesize($myfile));
 
readfile("$myfile"); 
exit();
}
 
?>