这段代码可以用来验证用户密码的基础上他们给。密码是加密使用md5内置函数,可以使用文件的生成提供了。这个代码设置cookie如果用户已经登录了,一旦他注销了,它改变了信息的cookie。-This code can be used to verify the user' s password on the basis they give. Md5 password is encrypted using the built-in functions, you can use the file generation. This code to set a cookie if the user has logged in, once he canceled, it changes the information the cookie.