Force Download Snippet

force-download.php

<?php
$filename = $my_file_name;
if(substr($filename,0,1) != "/"){
	$filename = "/". $filename;
}

if(ini_get('zlib.output_compression'))
  ini_set('zlib.output_compression', 'Off');

$file_extension = strtolower(substr(strrchr($filename,"."),1));

if( $filename == "" ) {
	header("Location: /error.php?nofile");
} elseif ( !file_exists( $filename ) ){
	header("Location: /error.php?file404");
};
switch( $file_extension ) {
	case "pdf": $ctype="application/pdf"; break;
	//case "exe": $ctype="application/octet-stream"; break;
	case "zip": $ctype="application/zip"; break;
	case "doc": $ctype="application/msword"; break;
	case "xls": $ctype="application/vnd.ms-excel"; break;
	case "ppt": $ctype="application/vnd.ms-powerpoint"; break;
	case "gif": $ctype="image/gif"; break;
	case "png": $ctype="image/png"; break;
	case "js" : $ctype="application/x-javascript"; break;
	case "jpeg":
	case "jpg": $ctype="image/jpg"; break;
	default: $ctype="application/force-download";
}
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: private",false);
header("Content-Type: $ctype");
header("Content-Disposition: attachment; filename=\"".basename($filename)."\";" );
header("Content-Transfer-Encoding: binary");
header("Content-Length: ".filesize($filename));
readfile("$filename");
exit();