Transition to Object-Oriented Hook Implementations Modernizes Core Functionality: DrupalEasy Blog

A recent update in Drupal core introduced a significant shift in how hooks are implemented, bringing a more modern, object-oriented approach to the platform. Traditionally, Drupal relied on plain PHP functions for hook implementations, a staple feature for over 18 years. However, with the new update in Drupal 11.1, most hooks can now be implemented as classes, using PHP attributes to define methods that act as hooks. This update aligns with Symfony’s event-driven architecture, further modernizing Drupal’s core codebase. Druapleasy's latest blogpost explains this topic.

Object-oriented hooks present several advantages. They replace plain PHP functions with classes, enhancing code organization and making Drupal's architecture more performant. These hook classes are also services, which optimizes their performance. For developers, this update allows for the grouping of related hooks within classes, improving code structure. The newly introduced "no_more_hooks" module demonstrates these changes, showcasing an example of hook_user_login() implemented in this new format with backwards compatibility for Drupal 10.3+.