elseIf $last did not exist, then this code executes. It simply welcomes a first time user to the site. They now have a cookie set in their browser so they will not get this message again.
{
echo "Welcome to our site!";
//Greets a first time user
}
?>
The top part of the script, that retrieves and sets the cookie, needs to be placed at the very top of a page to work. The rest of this script can run anywhere on your site that you want to welcome a user.
