Response headers

Hi, Is there any way to see the outgoing headers for a PHP document? I mean not only the headers I add via header(), but also the headers added by default by apache, such as Keep-Alive, Connection, Content etc. I need to count them and compute a traffic report for each PHP served and so far I've been able to do it fairly easy with the request headers, but as far as I could see, there is no way to read the outgoing headers in PHP. It would be really useful if someone would implement something like this in PHP and I suppose it's not that hard, given the fact that there already is a server_context->headers_out, at least for apache. Additionally, no idea if this is a bug or not, php_info() reports only a single response header (X-Powered-By) if called within a ob_start(); ob_end_*(); block. Please include me on CC if you answer, as I am not subscribed to the list. Thanks, Cristi