How to delete/unset a cookie on php?

Question

I want to unset/delete my existing cookie with this:

setcookie ("user", "", time()-1); 
unset($user);

But cookies can not be deleted or unset. So what is problem?

Answer 1

you can unset cookies this way only may -1 not work

try this

setcookie ("user", "", time() - 3600);