/**
* Sends the cache control headers Last-Modified and ETag
* Uses the timestamp of the cache file as base for calculation.
* Additionally, this method exits if the client sent a matching If-None-Match or If-Modified-Since header
* You can call this method twice if you created a new cache file and don’t have any other timestamp. It will only output the headers once.
* @param $iTimestamp deprecated: to use this method without a cache file, call LinkUtil::sendCacheControlHeaders directly
*/
public function sendCacheControlHeaders($iTimestamp = null)
{
if ($iTimestamp !== null) {
LinkUtil::sendCacheControlHeaders($iTimestamp);
} else {
LinkUtil::sendCacheControlHeadersForCache($this);
}
}
