Join Jon Peck for an in-depth discussion in this video Interacting with hooks, part of Drupal 7: Custom Module Development.
Drupal uses a unique approach for providing an application programming interface. …A hook is a PHP function that allows a module to hook into Drupal and modify behavior. …A Drupal hook functions similar to a callback, in that they act as triggered events. …Unlike an actual callback, hooks aren't registered with a listener. …Instead, Drupal executes hooks based on their name up on a particular event. …Hooks are similar to object oriented architecture in several ways.…
Hooks are constructed with a strict naming convention with function names prefixed with a module name. …Similar to an abstract method, each hook has a defined set of parameters and return type. …To use a hook, a developer will implement the hook by writing a function that conforms …to the naming convention and accepts the same parameters and returns the same type. …There are hundreds of hooks available in Drupal core, allowing developers to manipulate practically …every aspect of a page build. …Some common examples of hooks include, hook_form, which allows robust user facing forms to be …
- Creating your first module
- Interacting with hooks
- Working with permissions and roles
- Controlling access
- Adding a menu item to an admin interface
- Using the Form API (FAPI) to quickly create a form
- Creating custom form validation
- Manually creating a custom content type
- Validating user input
- Importing content using feeds
- Creating a block
- Understanding best practices and coding standards
Skill Level Advanced
Q: gmap3_tools is not working the way I expected it to. What version of gmap3_tools should I be using?
A: Use the free exercise file containing the version of gmap3_tools used for recording; the published version of the module on drupal.org has changed since recording and is not backwards compatible.
Q: I attempted to run the Drupal site root from the project files, but the site isn't loading. Why not?
A: The Drupal configuration file in sites/default/settings.php contains database configuration specific to the environment used to record the movie. This may be different than your environment. Edit the file and search for "windfarms" - you may need to change the database host, username, password, db name and port to match your specific environment.