php sessions ERRRRRRGH!!!!

[Anon]

i have a really wierd random bug in authentication. i am not sure if is a server problem, or my code.

here's what i am using to authenticate users

---

if($pass == $chkpass AND $chkuser == $user)
	{
	@session_start();
	session_register("user" , "userlevel");
	$HTTP_SESSION_VARS["user"] = $HTTP_POST_VARS["user"];
	$HTTP_SESSION_VARS["userlevel"] = $userlevel;
	session_write_close();
	header("Location: admin.php?".SID);
	}
	else { $chkpass = false; }
	}
}

---

here's what checks for them on the next page.

@session_start();
if(is_array($HTTP_SESSION_VARS)) {
extract($HTTP_SESSION_VARS);
var_dump ($HTTP_SESSION_VARS);
}

i am looking for user and userlevel. This works randomly well.. i can refresh the page several times, and will get this:

array(2) { ["user"]=> &string(5) "guest" ["userlevel"]=> &string(1) "a" }

or this:

array(0) { }

then i can hit refresh and get a semingly random occurance of either.

i don't get it please help.

thanks

[Anon]

session_register("user" , "userlevel");
$HTTP_SESSION_VARS["user"] = $HTTP_POST_VARS["user"];
$HTTP_SESSION_VARS["userlevel"] = $userlevel;

Try to check this:

http://bugs.php.net/bug.php?id=13229