<?
$file = $_POST['file'];
if ((isset($file))&&(file_exists($file))) {
    header("Content-type: application/force-download");
    header('Content-Disposition: inline; filename="' . $file . '"');
    header("Content-Transfer-Encoding: Binary");
    header("Content-length: ".filesize($file));
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename="' . $file . '"');
    readfile("$file");
} else {
    echo '<h1>No file selected or file does not exist ' . $_POST['file'] . '</h1><a href="index.php">Click here to go back</a>';
} //end if
?>