不用注册匿名投稿基本功能的实现（修改版，带验证码）

最基本的免注册匿名投稿功能。高手都不愿意写，偶抛块砖先……

注册用户发稿的方式，操作起来比较麻烦，偶简单改了一下，还是用注册发稿的功能，把登录和其他不必要的内容去掉，提取了发稿用得上的文件。为了不影响user目录文件的功能，所以新建了一个文件夹guest。-Do not register the realization of the basic functions of anonymous contributors (revised edition, with verification code) to avoid the most basic functions registered pseudonym. Masters are reluctant to write, even throwing bricks before filing ... ... way to registered users, operate more trouble, even a simple change a little, or registration filing with the function of the log and other unnecessary elements removed, extracted writing, the lingua franca of the file. In order not to affect the functions of user directory file, it created a new folder on guest.