图片删除
背景：我写了一个cms，有内容模型的，有点像dedecms那种的。字段是可以添加的，可以在后台管理那里自定义的。所以，哪些字段是用来存图片的，这会是不知道了。
问题：在删除记录的时候，怎么关联删除对应的那些图片？
解决：① 我试过用正则去遍历匹配出数据库里面的所有字段记录，得到图片地址，然后再比对文件夹里面的图片，逐一删除。不过，这也太麻烦了，而且慢。
② 上传图片的时候，给图片名加上记录的id，有id，那删除就简单了，不过，上传图片还会，都还没写入记录呢，哪里来的id呀？
最后：在这里求助各路大神，指导指导小弟，提供一下思路，，
小弟在这里谢谢大家
回复讨论(解决方案)
另外，内容修改的时候，那些被替换掉的图片又怎么处理呢？
方案②是正确的做法
不错，图片上传是先于文章的。也就是记录图片名时还缺少文章id
但是你可以再加一个字段记录 sessionid，待文章入库后再修改过来
对于已存在的文章，可以通过方案①记录下图片到表中。以备后用
方案②是正确的做法
不错，图片上传是先于文章的。也就是记录图片名时还缺少文章id
但是你可以再加一个字段记录 sessionid，待文章入库后再修改过来
对于已存在的文章，可以通过方案①记录下图片到表中。以备后用
我又想到了一个办法，就是把所有的图片地址都额外写入一个字段里面存起来，再使用方案① ，然后以后遍历的时候就只遍历这一个字段，就简单多了，不知道这样可行不
你的方案②不就是这个意思吗？
你的方案②不就是这个意思吗？
那个还真不是，嗯，结贴，谢啦
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