下载文件的点击数回填

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

{

?>

&id=">click here download

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");

?>