Ukážka použitia cookies v PHP

<?php
/**
 * @author sczdavos
 * @site www.itnetwork.cz
 */

header('Content-type: text/html; charset=utf8');

if (isset($_GET['cookies']))
{
    if ($_GET['cookies'] == 'set')
    {
        setcookie("infinity", "never-expire", time() + (20 * 365 * 24 * 3600));
        setcookie("time", "expire in: " . date('h:i:s d.m.Y', mktime(1, 2, 3, 4, 5, 2013)), mktime(1, 2, 3, 4, 5, 2013));
        setcookie("thirty-seconds", "expire in 30 seconds" , time() + 30);
    }
    else if ($_GET['cookies'] == 'del')
    {
        foreach ($_COOKIE as $n => $cookie)
            setcookie($n, "expired", time() - 3600);
    }

    header('Location: ' . $_SERVER['SCRIPT_NAME']);
}

echo('Infinity: ' . $_COOKIE['infinity'] . '<br />' . 'Thirty-seconds' . $_COOKIE['thirty-seconds'] . '<br />' . 'Time' . $_COOKIE['time']);

echo('<p><a href="cookies.php?cookies=set">Set this cookies</a> | <a href="cookies.php?cookies=del">Del all cookies</a></p>');

<?php
/**
 * @author sczdavos
 * @site www.itnetwork.cz
 */

header('Content-type: text/html; charset=utf8');

if (isset($_COOKIE['views']))
    $views = $_COOKIE['views'];
else
    $views = 0;

setcookie("last-seen", time());
setcookie("views", $views + 1);

echo('Views: ' . $_COOKIE['views'] . '<br />' . 'Last-seen: ' . date('h:i:s d.m.Y', $_COOKIE['last-seen']));