下载文件的点击数回填
需要名称为book的mysql数据库表
表中含有下列字段:
id   下载的文件的唯一标识
downnum  点击数

first.php
<?while($myrow = @mysql_fetch_array($result))
{
?>
<TR>
<TD>
<?if(empty($myrow["downnum"])) echo "0"; else echo $myrow["downnum"]; ?> 
</TD>
<TD>
<a  href="ddload.php?purl=downfileurl&dnnum=<?echo $myrow['downnum'?>&id=<?echo $myrow['id']?>">click here download </a>
</TD>
</TR>
<?};?>
 
ddload.php
<?
     
include("data.inc.php");
     if(
$incerror)
     {
           echo 
$incerror;
           exit;
     }
     if(empty(
$dnnum)) $dnnum 1;
     else 
$dnnum ++;
     
$sql "update book set downnum ='$dnnum' where id =$id";
     
mysql_query($sql);
     
mysql_close($connect);
     
header("location:$purl");
?>