[Mister B.]

Which should I use? Compare and contrast. Security/functionality. I just need info please.

[Eclipse]

Well it really depends what your using it for, they really are just as functional as the other but some people disable cookies so keep that in mind.

[Acecool]

Why cant we all just live in peace?
Session + Cookie..

If cookies enabled {
set cookie
set session
}
else
{
set session
}

if cookie exists {
read cookie, session
compare, tampered?
}
else
{
read session
}

[Mister B.]

Okay, I am more concerned about security to tell you the truth. It is for a login script. I want people to login, and to stay logged in till they leave the site for more the 15 minutes, or till they log out.