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

By Jennifer Hodgdon

If you’re an online programmer new to Drupal, this ebook exhibits you which of them programming concepts you could use—and that you may still avoid—when construction customized net functions with this content material administration framework. Drupal has its personal set of programming rules that require a special method, and lots of programmers make error while counting on abilities they’ve used for different tasks. the tips during this booklet assist you in the course of the transition via demonstrating which programming practices agree to the “Drupal way,” and which don’t.

If you’re accustomed to Hypertext Preprocessor, you’ll speedy methods to benefit from the strong Drupal API.
* Get an entire review of Drupal, together with Drupal center and add-on modules and topics
* examine Drupal’s simple programming rules, resembling the power to customise habit and output with hooks
* notice universal Drupal programming mistakes—and why hacking is certainly one of them
* discover particular components the place you could placed your programming abilities to paintings
* research programming suggestions and instruments that can assist you ideal and debug your purposes

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Extra resources for A Programmer's Guide to Drupal

Example text

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.

These functions allow you to build up a query in a database-independent way, and then execute it to get the same type of result set returned by db_query(). status = 1 // with node access enforced. $result = db_select('node', 'n') ->addTag('node_access') // Enforce node access permissions. ->fields('n', array('title', 'nid', 'created')) // Fields to return. status', 1) // WHERE condition. ->execute(); foreach ($result as $node) { // $node will be a PHP object with fields corresponding to the table fields.

Org lists all Drupal core theme functions and template files. Each theme function or template page lists “theme calls” (places in Drupal core that call theme('hook_name') to use that theme hook). php from previous versions of Drupal; theme functions will also be replaced by Twig files. Principle: Drupal Is International Drupal core and Drupal contributed modules and themes are ideally constructed so that their user interface elements use English by default, but can be translated into other languages.

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