if (!isset($_COOKIE['visits'])) $_COOKIE['visits'] = 0;
$visits = $_COOKIE['visits'] + 1;
setcookie('visits',$visits,time()+3600*24*365);
?>
/* http://www.manongjc.com/article/1249.html */
if ($visits > 1) {
echo("This is visit number $visits.");
} else { // First visit
echo('Welcome to my Website! Click here for a tour!');
}
?>
首选判断$_COOKIE['visits']是否存在,如果不存在将$_COOKIE['visits']设置为0;然后将$visits变量设置为$_COOKIE['visits']+1;再用setcookie函数创建一个名称为visits的cookie,其值为$visits,过期时间为365天。