title: Cookie and session in "remember me" feature
body: <p>I have never wanted to allow a user to stay logged in for any length of time so I never saw a use for a <strong>"remember me"</strong> feature. I started thinking about how it's done though and would like some clarification.</p>
  
  <p>I'm currently storing my sessions in a database. What has always perplexed me was how, even though I do not explicitly set a cookie, one is placed in my browser. I'm a little confused because a session is a session and a cookie is a cookie. I don't see how a session sets a cookie.</p>
  
  <p>I'd also like to know if, simply setting another session variable in the session array to keep the user logged in, would be sufficient or would I still need to set a cookie?</p>