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Chapter 8 Log in, log out Now that new users can sign up for our site ( Chapter  7 ), it’s time to give them the ability to log in and log out. We’ll be implementing all three of the most common models for login/logout behavior on the web: “forgetting” users on browser close ( Section  8.1 and Section  8.2 ), automatically remembering users ( Section  8.4 ), and optionally remembering users based on the value of a “remember me” checkbox ( Section  8.4.5 ). 1 The authentication system we develop in this chapter will allow us to customize the site and implement an authorization model based on login status and identity of the current user. For example, in this chapter we’ll update the site header with login/logout links and a profile link. In Chapter  9 , we’ll impose a security model in which only logged-in users can visit the user index page, only the correct user can access the page for editing their information, and only administrative users can delete other users

Multimedia From Wikipedia, the free encyclopedia This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed. (October 2006) ( Learn how and when to remove this template message ) Multimedia is content that uses a combination of different content forms such as text, audio, images, animation, video and interactive content. Multimedia contrasts with media that use only rudimentary computer displays such as text-only or traditional forms of printed or hand-produced material. Multimedia can be recorded and played, displayed, dynamic, interacted with or accessed by information content processing devices, such as computerized and electronic devices, but can also be part of a live performance. Multimedia devices are electronic media devices used to store and experience multimedia content. Multimedia is distinguished from mixed media in