Sessions logout. When delete it and when change?

Question

where i work they destroy the session, but is better to change it to say the session is over?

Answer 1

Ok if you are working with forms,, the part of log out,, you should use session_destroy() ; to destroy all the sessions or use session_unset() ; it will do the same

Answer 2

Is this a question or a statement

Answer 3

on login u need to use the session created then on logout the session destroy logout is used.

Answer 4

sorry for my English. is a question because i'm not sure of which option is better or in which situation. Delete all the session always, change it or a mix?