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11.2. Introduction to Forms

At the heart of the Web is the form. It is used to pass information from the browser to the server. Anytime you go online and order a book, trade at an auction, fill out a survey, or send an e-mail using a Web browser, you are working with a form.

An HTML form offers you a number of ways to accept input, such as radio buttons, checkboxes, pop-up menus, and text boxes; these are called virtual input devices. Once the form has been filled out by a user, it normally is sent to a server where the input is processed by a server-side program, such as a CGI, ASP, or PHP application.


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