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What is a hook 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.
Throughout Drupal, you will find the concept of a Teaser. A teaser is a short piece of text, usually the first paragraph or two of an article. You will be able to change the number of words after which Drupal attempts to break the text cleanly.
How are hooks used in Drupal core API?
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 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”).
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.
How to change the name of a function in Drupal?
Change the name of the function, substituting your module’s short name (name of the module’s directory, and .info.yml file without the extension) for the “hook” part of the sample function name. For instance, to implement hook_batch_alter (), you would rename it to my_module_batch_alter ().