Dedecms允许不同会员发布相同文章，不允许同一会员发布重复文章的方法：

PHP 文件

GetOne("SELECT * FROM `dsfw_archives` WHERE title LIKE '$title' "); if(is_array($row)) { ShowMsg("对不起，请不要发布重复文档！","-1","0",5000); exit(); } }

GetOne("Select * From `dede_archives` where title like '$title' ");

修改为

GetOne("Select * From `dede_archives` where title like '$title' and mid = '".$cfg_ml->M_ID."'");