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HomeBackend DevelopmentPHP Tutorial用户发帖过程中上传临时图片该如何处理

比如用户发一个帖子要先上传图片(文件是保存在七牛这类第三方平台,用户上传成功后会向数据库里写一条记录的),当用户把图片上传完成后,用户突然不想发帖了,直接关掉了浏览器。结果导致用户刚刚上传的图片成为垃圾。
请问,我该怎么设置数据库 逻辑,当用户上传的文件没被使用时,后台直接清除掉文件

回复内容:

比如用户发一个帖子要先上传图片(文件是保存在七牛这类第三方平台,用户上传成功后会向数据库里写一条记录的),当用户把图片上传完成后,用户突然不想发帖了,直接关掉了浏览器。结果导致用户刚刚上传的图片成为垃圾。
请问,我该怎么设置数据库 逻辑,当用户上传的文件没被使用时,后台直接清除掉文件

我看不下去了,

说方法吧,不管最后发不发帖,都将上传对应的图片id存到数据库,只是该图片的对应帖子id为空或者0,查询距当前时间一小时((时间自己决定)),若没有对应的就认为他垃圾图片,调用七牛接口删除,删除数据库记录

若发帖了就标记对应的帖子id

方法很多啊,个人认为最简单的做发是,在发贴成功前,图片先存临时文夹,或做临时文件标识,发贴成功后才把图片移动到相应文件夹或去除临时文件标识,这样,定时去删除临时文件就好了,

没有用数据库保存过文件,说下目录保存文件,比如form表单上传文件上传后文件会保存在系统临时目录,之后一般会移动到Web下的文件目录,所以你可以再分一个目录当作永久目录,对于保存的将文件移动到永久目录,临时目录定时清理就OK。对于数据库存文件,form上传后仍然会保持在系统临时目录,你可以将文件移动到一个临时存储表或者临时目录,保持成功再移动到永久存储表/目录,再定时清理临时表/目录。这样你其实有3个地方存储:系统临时目录,临时目录/临时表,永久目录/永久表,再省事的方法就是只用系统临时目录+永久目录/永久表,上次后文件在系统临时目录,只记录个路径,保持后移动到永久目录/永久表,不保存的定时清理。

其实php上传的文件一开始是保存到了系统临时目录里的。你不去动它就好了。

或者你需要:
http://php.net/manual/zh/function.tempna...
这个函数会在临系统时目录生成一个能使用的临时文件。

七牛官方多媒体静态资源的处理还是建议使用js sdk的方式上传,可以减少服务器端的处理,只需要记住文件上传后的几个基本信息即可,非常省事,性能当然也是目前最佳选择。安全性不用担心,请参考文档,并做好js跨域控制。关注「phpgod」PHP技术大全,成就大神就不远。

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