PHP cookie expire

Question

Okay, when logging in I simply set a cookie to true and set it to expire in a fortnight. but if the user wants to logout, how do I edit that cookie to say false or just make it go away by expiring it?

Answer 1

Use setcookie() again. You can either set it's value to false or make it expire in the past. Both should have the desired effect.

Answer 2

From PHP:

setcookie('yourCookie', '');

You can also do it in JavaScript

document.cookie='yourCookie=';