Display welcome message to first-time visitors

Question

Looking for a simple way to show a welcome message to first time visitors on my website. What's the best approach?

Answer 1

Using a cookie:

if (empty($_COOKIE['first_time'])) {
    show_welcome_message();
    setcookie("first_time", 1, time()+157680000);  /* expire in 5 years */
}

Of course, if the users clears his cookies, he'll see the message again. If he doesn't accept cookies, he'll see the message all the time.