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CHAPTER 13• WORKING WITH HTML FORMSwww.it-ebooks.info$language = $fieldSet->addSelect('language', null, array('options' => $languages));$language->setLabel('Choose Your Favorite Programming Language:');$language->addRule('required', 'Please choose a programming language.');$fieldSet->addElement('submit', null, 'Submit!');if ($form->validate()) {echo "SUCCESS";}$renderer = HTML_QuickForm2_Renderer::factory('default')->setOption(array('group_errors' => true));echo $form->render($renderer);?>Let’s review Listing 13-1’s key features:• The $languages array defines the array that populates the languages select boxshown in Figure 13-2. This is an associative array because we need to define boththe option key and value used to populate the select box.• The HTML_QuickForm2 constructor accepts several parameters, including theform’s ID attribute (languages) and the method (POST).• The addFieldSet() method creates a new field set container.• The addText() method adds a new input field. Notice how we are associating thiswith the field set rather than the form, which indicates to HTML_QuickForm2 thatthe input field should be placed inside the field set. The addRule() method givesyou the ability to validate this field, in this example determining whether the fieldis required. The required flag is only one of several available to you; you canvalidate a field’s length, compare it with ranges and other values, and much more.Consult the HTML_QuickForm2 documentation for more details.• The addSelect() method creates a select box. Notice how the $languages array ispassed into the method.• The validate() method validates the form based on the defined rules. Of course,in a real-world situation you’ll want to provide the user with a more effectivestatus message. Notice how this appears before the form is rendered. Neglectingto validate the form before it is rendered will cause the form to not be validatedproperly.• Finally, the form is rendered using the render() method. In this example, we’reusing HTML_QuickForm2’s default rendering mechanism; if you have moreflexible formatting needs, look into HTMLQuickForm2’s powerful renderingoptions.300
www.it-ebooks.infoCHAPTER 13• WORKING WITH HTML FORMSSummaryOne of the Web’s great strengths is the ease with which it enables us to not only disseminate but alsocompile and aggregate user information. However, as developers, this means that we must spend anenormous amount of time building and maintaining a multitude of user interfaces, many of which arecomplex HTML forms. The concepts described in this chapter should enable you to decrease that time atad.In addition, this chapter offered a few commonplace strategies for improving your application’sgeneral user experience. Although not an exhaustive list, perhaps the material presented in this chapterwill act as a springboard for you to conduct further experimentation while decreasing the time that youinvest in what is surely one of the more time-consuming aspects of web development: improving theuser experience.The next chapter shows you how to protect the sensitive areas of your web site by forcing users tosupply a username and password prior to entry.301
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www.it-ebooks.infoBeginning PHP and
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www.it-ebooks.infoAbout the Author
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www.it-ebooks.info•Acknowledgment
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www.it-ebooks.info• INTRODUCTIONC
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www.it-ebooks.infoC H A P T E R 1
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