New PDF release: A Programmer's Guide to Drupal

By Jennifer Hodgdon

ISBN-10: 1449343317

ISBN-13: 9781449343316

If you’re an internet programmer new to Drupal, this ebook indicates you which ones programming thoughts 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 ideas that require a distinct procedure, and plenty of programmers make errors whilst counting on abilities they’ve used for different initiatives. the information during this ebook assist you in the course of the transition through demonstrating which programming practices comply with the “Drupal way,” and which don’t.

If you’re conversant in personal home page, you’ll speedy methods to make the most of the robust Drupal API.
* Get an entire evaluate of Drupal, together with Drupal center and add-on modules and subject matters
* study Drupal’s simple programming rules, resembling the facility to customise habit and output with hooks
* become aware of universal Drupal programming mistakes—and why hacking is one in all them
* discover particular parts the place you could placed your programming abilities to paintings
* examine programming suggestions and instruments that can assist you excellent and debug your functions

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URL access permission will also be checked for the form submission URL. • You should also use confirmation forms to prevent hacking attacks that might trick an administrative user into visiting a URL that would maliciously destroy or alter data. For instance, if your module has a URL that triggers deleting a particular database record, have that URL instead display a confirmation form, and only delete the database record if the action is confirmed. Further reading, examples, and references: • Defining a form array: “Generating Forms with the Form API” (page 59) • Confirmation forms: “Using confirmation forms” (page 61) • The Form example from Examples for Developers 30 | Chapter 2: Drupal Programming Principles Permissions in displaying and operating on content Some Drupal core modules that manage content have complex permissions systems that also need to be considered in your module programming.

4. php. You will be presented with a list of pending updates, which should include the update function you just created and show the description from the function comment. Principle: Drupal Is Database Independent | 23 Do not attempt to call Drupal Database API functions such as dru pal_write_record() that rely on the schema from an update function, because the schema will be in an unknown state while the update func‐ tion is running. Correspondingly, never reference your hook_schema() implementation in an update function—always write out the full array values in your calls to db_change_field() and similar functions.

Result = db_select('node', 'n') ->addTag('node_access') // Enforce node access permissions. ->fields('n', array('title', 'nid', 'created')) // Fields to return. status', 1) // WHERE condition. ->execute(); foreach ($result as $node) { // $node will be a PHP object with fields corresponding to the table fields. $title = $node->title; // ... } Notes: • Unlike when using the simple db_query(), do not enclose table names in {}. • The addTag() method is used when you are querying a table with permissions considerations.

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A Programmer's Guide to Drupal by Jennifer Hodgdon

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