登录模块用来处理系统的用户登录请求，从而防止非系统使用者进入。管理员或者网站用户通过该界面输入正确的用户名和密码，就可以登录系统界面对系统进行管理和操作；而当其输入错误的信息时则会出现提示信息，从而需要重新登录。登录的过程实际上就是用户输入的内容与数据库内相关数据进行比较，如相符则可以进入系统，若经核对不相同则无法进入系统。系统默认提供了一个管理员，其用户名为“admin”，密码为“admin”。-Login modules used to handle user login requests, thereby preventing the entry of non-system users. Administrator or the user through the interface, enter the correct user name and password, you can log in to the system interface to the system management and operation　message occurs when it enters the wrong information, and thus need to log in again. The login process is actually entered by the user content and related data within the database comparison, such as match, you can enter the system, if not enter the system through the check is not the same. The system provides by default an administrator user named "admin", password "admin".撤消修改