Discuz! 5.0.0论坛程序中加入一段js代码，让会员点击下载附件前自动弹出提示窗口

　　你需要修改attachment.php文件在根目录下
在$attachexists=$ispaid=FALSE;下面添加
if(!empty($checktwo)){
在最末尾的?>前添加
}else{
echo<script>alert(写上你要提示的内容)</script>;
echo<METAHTTP-EQUIV=\Refresh\CONTENT=\0;URL=$PHP_SELF?checktwo=1&aid=$aid\>;
}
我在本机架设Discuz!5.0.1调试通过了
完整代码如下：
<?php
/*
[Discuz!](C)2001-2006ComsenzInc.
ThisisNOTafreeware,useissubjecttolicenseterms
$RCSfile:attachment.php,v$
$Revision:1.13$
$Date:2006/08/1106:51:07$
*/
$discuz_action=14;
if($attachrefcheck&&$_SERVER[HTTP_REFERER]&&preg_replace(/https?:\/\/([^\/]+).*/i,\\1,$_SERVER[HTTP_REFERER])!=$_SERVER[HTTP_HOST]){
//header(Location:{$boardurl}images/common/invalidreferer.gif);
showmessage(attachment_referer_invalid,NULL,HALTED);
}
/*
$query=$db->query(SELECTa.*,t.fid,p.authoridFROM{$tablepre}attachmentsa,{$tablepre}threadst,{$tablepre}postsp
WHEREa.aid=$aidANDt.tid=a.tidANDp.pid=a.pidANDt.displayorder>=0ANDp.invisible=0);
$attach=$db->fetch_array($query);
*/
periodscheck(attachbanperiods);
$attachexists=$ispaid=FALSE;
if(!empty($checktwo)){
if(!empty($aid)){
$query=$db->query(SELECT*FROM{$tablepre}attachmentsWHEREaid=$aid);
if($attach=$db->fetch_array($query)){
$query=$db->query(SELECTtid,fid,price,specialFROM{$tablepre}threadsWHEREtid=$attach[tid]ANDdisplayorder>=0);
$thread=$db->fetch_array($query);
if($thread[fid]){
$query=$db->query(SELECTauthoridFROM{$tablepre}postsWHEREpid=$attach[pid]ANDinvisible=0);
if($db->num_rows($query)){
$attach[authorid]=$db->result($query,0);
$attachexists=TRUE;
}
}
}
}
if($allowgetattach&&($attach[readperm]&&$attach[readperm]>$readaccess)&&$adminid<=0&&!($discuz_uid&&$discuz_uid==$attach[authorid])){
showmessage(attachment_forum_nopermission,NULL,NOPERM);
}
if(!$thread[special]&&$thread[price]>0&&(!$discuz_uid($discuz_uid&&$discuz_uid!=$attach[authorid]&&$adminid<=0))){
$query=$db->query(SELECTuidFROM{$tablepre}paymentlogWHEREuid=$discuz_uidANDtid=$attach[tid]);
if($db->result($query,0)){
$ispaid=TRUE;
}else{
showmessage(attachment_payto,viewthread.php?tid=.$attach[tid]);
}
}
$filename=$attachdir./.$attach[attachment];
if(is_readable($filename)&&$attachexists){
$query=$db->query(SELECTf.viewperm,f.getattachperm,f.getattachcredits,a.allowgetattachFROM{$tablepre}forumfieldsf
LEFTJOIN{$tablepre}accessaONa.uid=$discuz_uidANDa.fid=f.fid
WHEREf.fid=$thread[fid]);
$forum=$db->fetch_array($query);
if(!$ispaid){
if(!$forum[allowgetattach]){
if(!$forum[getattachperm]&&!$allowgetattach){
showmessage(group_nopermission,NULL,NOPERM);
}elseif(($forum[getattachperm]&&!forumperm($forum[getattachperm]))($forum[viewperm]&&!forumperm($forum[viewperm]))){
showmessage(attachment_forum_nopermission,NULL,NOPERM);
}
}
}
if(!($isimage=preg_match(/^image\/.+/,$attach[filetype]))){
checklowerlimit($creditspolicy[getattach],-1);
}
if(empty($noupdate)){
if($delayviewcount==2$delayviewcount==3){
$logfile=./forumdata/cache/cache_attachviews.log;
if(substr($timestamp,-1)==0){
require_onceDISCUZ_ROOT../include/misc.func.php;
updateviews(attachments,aid,downloads,$logfile);
}
if(@$fp=fopen(DISCUZ_ROOT.$logfile,a)){
fwrite($fp,$aid\n);
fclose($fp);
}elseif($adminid==1){
showmessage(view_log_invalid);
}
}else{
$db->query(UPDATE{$tablepre}attachmentsSETdownloads=downloads+1WHEREaid=$aid,UNBUFFERED);
}
}
if(!$isimage){
$forum[getattachcredits]=$forum[getattachcredits]?unserialize($forum[getattachcredits]):array();
$getattachcredits=$forum[getattachcredits]?$forum[getattachcredits]:$creditspolicy[getattach];
updatecredits($discuz_uid,$getattachcredits,-1);
}
$filesize=filesize($filename);
ob_end_clean();
header(Cache-control:max-age=31536000);
header(Expires:.gmdate(D,dMYH:i:s,$timestamp+31536000).GMT);
header(Content-Encoding:none);
$attach[filename]=(strtolower($charset)==utf-8&&strexists($_SERVER[HTTP_USER_AGENT],MSIE))?urlencode($attach[filename]):$attach[filename];
if($isimage&&!empty($noupdate)){
header(Content-Disposition:inline;filename=.$attach[filename]);
}else{
header(Content-Disposition:attachment;filename=.$attach[filename]);
}
header(Content-Type:.$attach[filetype]);
@$fp=fopen($filename,rb);
@flock($fp,2);
$attachment=@fread($fp,$filesize);
@fclose($fp);
echo$attachment;

}else{
showmessage(attachment_nonexistence);
}
}else{
echo<script>alert($PHP_SELF)</script>;
echo<METAHTTP-EQUIV=\Refresh\CONTENT=\0;URL=$PHP_SELF?checktwo=1&aid=$aid\>;
}
?>