php request/post/get/session expiration

[Lojic]

I know a SESSION can expire but what about $_REQUEST/$_POST/$_GET variables? My question is, I have users that submit information and I need to set a Id for that information before I insert it into a database. Now I thought about using a SESSION but the problem is if the session expires before the user has submitted the information to the database they loose the Id I need. Would passing it the $_REQUEST/$_POST/$_GET variable(s) be a better solution or should I just use a variable and readjust the script?Also I was using SESSION as it's very easy to call from inside a function without passing it in.\[code\]function setInfo() { // no need to pass I can call from within $Id = $_SESSION['Id'];}\[/code\]Is this good practice? EDIT:Would this be better as a cookie?