7 - How do I properly render a private file URI with l()? - Drupal Answers
Provide a setting to override base url when creating links to public files. [#2522008] | Drupal.org
File formatter render absolute url to file [#2811043] | Drupal.org
Call to undefined function file_create_url() [#3379036] | Drupal.org
Deprecate drupal_get_path() and drupal_get_filename() and replace with ExtensionList::getPath() and ExtensionList::getPathname() [#2347783] | Drupal.org
Provide a setting to override base url when creating links to public files. [#2522008] | Drupal.org
Custom logo and favicon stored in private filesystem if it is the default [#1087250] | Drupal.org
Drupal 7 API Component Overview | PDF
File formatter render absolute url to file [#2811043] | Drupal.org
Drupal D9-D10 Upgrade] Resolve error: deprecated function “file_create_url()” and “file_url_transform_relative()” - Suowei Hu - Medium
Change the code to avoid using functions, methods, constants, and services that have been deprecated in Drupal 9 and removed from Drupal 10 [#3366449] | Drupal.org