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Download A Programmer's Guide to Drupal by Jennifer Hodgdon PDF

By Jennifer Hodgdon

If you’re an internet programmer new to Drupal, this e-book indicates you which of them programming innovations you could use—and that you may still avoid—when construction customized internet functions with this content material administration framework. Drupal has its personal set of programming rules that require a unique method, and plenty of programmers make errors whilst counting on abilities they’ve used for different initiatives. the ideas during this ebook assist you during the transition by way of demonstrating which programming practices agree to the “Drupal way,” and which don’t.

If you’re acquainted with Hypertext Preprocessor, you’ll speedy how one can benefit from the strong Drupal API.
* Get an entire evaluation of Drupal, together with Drupal middle and add-on modules and subject matters
* examine Drupal’s easy programming ideas, equivalent to the power to customise habit and output with hooks
* notice universal Drupal programming mistakes—and why hacking is one in every of them
* discover particular parts the place you could placed your programming talents to paintings
* examine programming advice and instruments that will help you excellent and debug your functions

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Responding to events The contributed Rules module allows you to define responses (such as sending email or redirecting to a different page) to various events (such as updating or adding content) on your website, under certain conditions (such as matching a content type or user role). If the events, conditions, or responses defined by the Rules module do not cover your needs, you can extend it. The Notifications module can also be useful—it lets users subscribe to content updates on a site. Site navigation Novice Drupal programmers sometimes want to hardcode site navigation into their theme templates, because they have used this approach to ensure uniform naviga‐ tion on custom-built PHP/MySQL or pure HTML sites in the past.

Of course, following the principles in Chapter 2 will also help you shift your thinking to the Drupal way of doing things, and the suggestions and tools in Chapter 5 can help you avoid mistakes and find the mistakes that you do make. Mistake: Programming Too Much Experienced programmers who are new to Drupal often suffer from a variety of the “if all you have is a hammer, everything looks like a nail” syndrome: when faced with a challenge on a website (such as adding a feature or fixing a problem), they always try to solve it with programming.

See “Generating Forms with the Form API” (page 59) for more on the Form API. Mistake: Saving PHP Code in the Database It is possible, by enabling certain modules and granting certain permissions, for users to include PHP code within the body of page or block content (and in other places), which is executed when the page or block is displayed. While this might seem like a great convenience and a time-saver, it is usually a mistake to allow this because of the following factors: Mistake: Saving PHP Code in the Database | 43 Security risk PHP code can add, change, or delete files and database records (any PHP code run during a page request has full rights to change the database).

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