August 2008
Intermediate to advanced
703 pages
16h 10m
English
Content preview from Pro Drupal Development, Second Edition
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CHAPTER 2Writing a Module
In many open source applications, you can customize the application by modifying the source code. While this is one method for getting the behavior you desire, it is generally frowned upon and considered a last resort in the Drupal community. Customizing code means that with each update of Drupal, you must perform more work—you must test to see that your customization still works as expected. Instead, Drupal is designed from the ground up to be modular and extensible.
Drupal is a very lean framework for building applications and the default installation is referred to as the Drupal core. Functionality is added to the core by enabling modules, which are files that contain PHP code. Core modules reside in the modules ...
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