What should I do when saving login information? What should I do?

What should I do when saving login information ?? Logging & quot; & gt; & lt; iframe & gt;) indicates logon. how can I record the logon information. the other nested pages need login information to determine whether a user is logged on. please help me to save some suitable login proxy information. what should I do ??
A home page has three nested pages ( <Iframe>) <br/> indicates how to record the logon information. the other nested pages need login information to determine whether the user is logged on. please help me and leave some suitable code for reference. it does not matter if the code is short. <br> <br/> ------ solution -------------------- <br/> Generally, the login information is stored in the session, and a method is written to determine whether to log on, you can call the interface at the beginning of each page. what does this have to do with the three nested pages on the home page? <Br/> ------ solution ------------------ <br/> use session to write data to the session after successful logon. when you exit, clear a session or set its expiration time <br/> ------ solution ------------------ <br/> use setcookie () <br/> ------ solution ------------------ <br/> session ("username ") = Request. form ("username") <br/> The entire page has a session, which has nothing to do with your framework <p class = "clear">