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Dynamic pages |
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While surfing the Web you may have found Web pages that change
their appearance and contents as time goes by. Newspaper and
magazine Web sites change frequently, sometimes daily or even
hourly. Often these changes come about when someone puts a new
version of a Web page on the Web server. But there are also
pages that automatically update themselves, drawing
information from database and other resources not part of the
original content. We call these pages dynamic pages.
With dynamic pages, Web masters perform fewer
administrative tasks to keep their pages current. It makes Web
pages more interesting to Web users, and interesting Web pages
are more likely to be revisited.
This page is itself a dynamic page. The greeting at the
beginning of the page changes depending on the time of the
day. Note that the current time of a computer's clock is a
resource available to the Web server. Other examples of
resources available to the Web server are the IP address of
the client that has connected to the server and the
identification of the kind of agent (browser) the client is
using. |
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