title: i'm dealing with cookies and session problems
body: <p>I'm a beginner in PHP and I just see the cookies and session notion. from my understanding when we log in, a session start, and a cookie with the ID of the session is stored in our computer. so my questions:
  1-If we disconnect from the page. the cookie is destroyed or still remaining.
  2-If it still remaining we can't have another account on the site because if we enter the page the session will continue because we have the cookie pre-existed so how can we have other accounts. I'm sorry for the bad English and thanks for your answers.</p>