Output buffering - saving + echoing

Hi, When using ob_start(), the output is buffered and not sent till ob_end_flush() is called or got to end of the script. Also before flushing you can get the buffer contents by ob_get_contents(). <? //start buffering, from now on no output. //NEED: start buffering, but output imediatly when echo. ob_start(); //this is not echoed now. //NEED: echo this now, but still buffer it too. echo "Hello, World!"; //getting the buffer contents. //NEED: getting the buffer contents. $buf=ob_get_contents(); //the buffer is echoed just now. //NEED: stop the buffering, and not output all the buffer now. ob_end_flush(); ?> What I want to do is "catch" the output buffer, but do not delay the buffer to be sent. How is it done? thanks in advance, Lorderon.