5. Interacting with Web Forms
HTML forms are one of the key ingredients of any dynamic Web site because they can enable the users of a site to interact with it. Otherwise, Web sites are more or less static: They may be driven by a database and, therefore, regularly changing, but they look the same for each and every visitor. HTML forms can change that; therefore, using data from forms within PHP is very important.
Reading the information in is a very easy task: For form data submitted via GET (that is, in the uniform resource identifier [URI] of the page requested), the data can be found in $_GET[<value of name attribute of form field>]. $_GET[<value of name attribute of form field>] holds the field data if the form has been submitted via POST ...
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