How to send "post"-variables in a "Location" header

Hi all.

I have a scenario, wherein I need to do something like this ::

###############################################################
        $original_url = "/autologin.php";
        $username = "ajay";
        $password = "garg";

        header('Location: ' . $original_url);
###############################################################

As can be seen, I wish to redirect to the URL "autologin.php".

Additionally, I wish to pass two POST key-value pairs :: "user=ajay" and
"password=garg" (I understand that passing GET key-value pairs is trivial).

Is it  even possible?
If yes, I will be grateful if someone could let me know how to redirect to
a URL, passing the POST key-value pairs as necessary.


Looking forward to a reply :)


-- 
Regards,
Ajay