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Page header for Namespaces page in Drupal 9

Same name and namespace in other branches
  1. 8 core/core.api.php \listing_page_namespace

Introduction to namespaces

PHP classes, interfaces, and traits in Drupal are namespaced. See the Objected-oriented programming conventions for more information.

See also

Objected-oriented programming conventions

File

core/core.api.php, line 1533
Documentation landing page and topics, plus core library hooks.