Re: Question about apache-php concurrent process control

I now encounter a problem with flow control of my program with PHP. This is very crucial to the design of a pretty big project. This is what I want to do in the program: <?php do_A(); header("Location: ".$result_of_do_A); do_B(); ?> Since it takes do_B() quite a while to finish, so I want the http client get the partial result from do_A() by redirect a page to them before start do_B(). But it seems that the redirection will only occure after the entire php program finishes, i.e., after do_B(). I sent http request through browser, curl comman line with -N (no buffer) option and with a perl LWP program I wrote. All of them suggest that header(), although is put before do_B() in code, gets executed only after all the php code finished. I add flush() after header() too, but no work. My question is: Is there any way that I can return to the client though http response and then continue my progress with my program? Thank you very much for your kindly help.