PHP cookie expire

Okay, when logging in I simply set a cookie to true and开发者_开发问答 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?

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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.

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From PHP:

setcookie('yourCookie', '');

You can also do it in JavaScript

document.cookie='yourCookie=';