What is the difference between Sessions and Cookies in PHP?

Question

What is the distinction between Sessions and Cookies in PHP?

Answer 1

One part missing in all these explanations is how are Cookies and Session linked- By SessionID cookie. Cookie goes back and forth between client and server - the server links the user (and its session) by session ID portion of the cookie. You can send SessionID via url also (not the best best practice) - in case cookies are disabled by client.

Did I get this right?

Answer 2

A cookie is a bit of data stored by the browser and sent to the server with every request.

A session is a collection of data stored on the server and associated with a given user (usually via a cookie containing an id code)