set cookie to activate every 3 days code example

Example 1: cookie are not set in php

setcookie('username',$username,time()+60*60*24*365);
// 'Force' the cookie to exists
$_COOKIE['username'] = $username;

Example 2: php page sends cookie to visitor

<?php $Month = 2592000 + time();//this adds 30 days to the current timesetcookie(UserVisit, date("F jS - g:i a"), $M