WB 2.08.x

	// start buffering for size determination

	ob_start();

	// add no cache headers

	header("Expires: Mon, 1 Jan 1990 05:00:00 GMT");

	header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");

	header("Cache-Control: no-store, no-cache, must-revalidate");

	header("Cache-Control: post-check=0, pre-check=0", false);

	header("Pragma: no-cache");

	header("Content-type: image/png");

	// Make image

	// Fetch length

	header("Content-Length: " . ob_get_length());

	// send image and turn off buffering

	ob_end_flush();

	// clear memory