By admin, 12 August, 2026 The .theme File Extension Is Deprecated in Drupal 11.5: A Guide to OOP Theme Hooks Drupal 11.5 introduces an important change for theme developers: the .theme file extension has been deprecated.Themes have traditionally placed procedural hooks and helper functions in a file such as: Tags Drupal 11.5 Drupal 13 Drupal themes Drupal theme development Drupal OOP hooks Drupal Hook API Drupal hooks .theme files Drupal deprecations Drupal migration PHP Drupal Core Drupal developers
