Codice PHP:
<?php
if(!isset($_COOKIE['bannerA']))
{
$banner = 'A';
setcookie('bannerA', 'wewe', time()+(3600*24), '/');
}
else if(!isset($_COOKIE['bannerA']))
{
$banner = 'B';
setcookie('bannerB', 'wewe', time()+(3600*24), '/');
}
// etc etc sempre else if
?>
<html>
<body>
<?php
switch($banner)
{
case 'A': echo 'banner A'; break;
case 'B': echo 'banner B'; break;
// etc etc
}
?>
</body>
</html>