分类信息 image调用的丢失问题
首先是页面中对于分类信息的调用方式。如此如此这般，网上多如牛毛，本人用得尚浅，不做过多说明，今天的主角是分类信息diy image的调用问题。
如果在最新版(2013-2-28：以当前时间为准)，的discuz中
新的image的获取方式里。因为漏洞问题，修改了生成key的方式 function_core.php:getforumimg
生成key的函数由md5 改成dsign
(因为这个是md5这个是漏洞问题导致容易被别人爆菊花，就是改参数，让服务器生成，这样对服务器来说有危险，看哪个站不爽，可以用此招爆他。。)
后来改了。生成的加密串里，用到的key有两个新的，一个是系统的密钥，一个是uid.
问题来了。在我生成时没有问题。
详见:
/source/module/forum/forum_image.php
但是，如是是系统自己生成的，即更新时，使用的是别人的uid,这样，我下次访问时，因为检查用的是我的uid.导致了不通过。造成图片无法读取的小bug了。
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