private function outputImageForDownload($filepath, $filename, $mimeType = "")
{
$contents = file_get_contents($filepath);
$filesize = strlen($contents);
if ($mimeType == "") {
$info = UniteFunctionsBanner::getPathInfo($filepath);
$ext = $info["extension"];
$mimeType = "image/{$ext}";
}
header("Content-Type: {$mimeType}");
header("Content-Disposition: attachment; filename=\"{$filename}\"");
header("Content-Length: {$filesize}");
echo $contents;
exit;
}