将作品的ID也保存再cookie里if(isset($poll) && strcmp($_COOKIE[pollid],$id)==0) //用cookie检测是否已经投过票了
{
echo "您已经投过票了,谢谢您的参与!返回调查首页。";
exit();
}//增加该作品的票数
//先从数据库里得到$nums的值
$nums=$nums+1;
mysql_query("update table_name set counts=$nums where id=$id");
//从未投过票,设定cookie
setcookie("poll","voted",time()+60);
setcookie("pollid","$id",time()+60);
header("location:index.php");
exit();
{
echo "您已经投过票了,谢谢您的参与!返回调查首页。";
exit();
}//增加该作品的票数
//先从数据库里得到$nums的值
$nums=$nums+1;
mysql_query("update table_name set counts=$nums where id=$id");
//从未投过票,设定cookie
setcookie("poll","voted",time()+60);
setcookie("pollid","$id",time()+60);
header("location:index.php");
exit();
if(isset($poll) && in_array($id,$_COOKIE[pollid]) //用cookie检测是否已经投过票了
{
echo "您已经投过票了,谢谢您的参与!返回调查首页。";
exit();
}//增加该作品的票数
//先从数据库里得到$nums的值
$nums=$nums+1;
mysql_query("update table_name set counts=$nums where id=$id");
//从未投过票,设定cookie
setcookie("poll","voted",time()+60);
setcookie("pollid[]","$id",time()+60);
header("location:index.php");
exit();