What is the purpose of hooks in Drupal?
Hooks allow modules to alter and extend the behavior of Drupal core, or another module. They are one of the various ways that code components in Drupal can communicate with one another. Using hooks a module developer can change how core or another module works — without changing the existing code.
How can modules alter the core behavior of Drupal?
One way for modules to alter the core behavior of Drupal (or another module) is to use hooks. Hooks are specially-named functions that a module defines (this is known as “implementing the hook”), which are discovered and called at specific times to alter or add to the base behavior or data (this is known as “invoking the hook”).
How do you hook a PHP function in Drupal?
Define a PHP function whose name follows a known pattern, and Drupal will call that function at critical points during the life cycle of a request. Just replace the word HOOK in the hook definition with the machine name of your module, and presto, you’ve implemented a hook.
Where can I find a module handler in Drupal?
You can obtain a module handler by calling \\Drupal::moduleHandler (), or getting the ‘module_handler’ service on an injected container. Documentation landing page and topics, plus core library hooks.
Which is better Joomla or Drupal CMS system?
The Joomla and Drupal platforms share many similarities. However, there are certain undeniable capabilities that a CMS system needs that determine whether Drupal is a top choice or if you should explore alternatives to Drupal.
How is a Drupal module different from a PHP file?
A Drupal module is a collection of files containing some functionality and is written in PHP. Because the module code executes within the context of the site, it can use all the functions and access all variables and structures of Drupal core. In fact, a module is no different from a regular PHP file…