setcookie to an empty value not working

Question

i have this code im trying to do for a type of cache system so it remembers the city the user has selected. if the user has selected a city it stores it in sessions and cook

Answer 1

You can't set a cookie with an empty string as it will delete the cookie.

From the docs:

If the value argument is an empty string, or FALSE, and all other arguments match a previous call to setcookie, then the cookie with the specified name will be deleted from the remote client.