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Drupal compatibility layer. These functions and classes are wrappers around Backdrop functions that allow for Drupal 7 modules to work with Backdrop. All of these functions are made available if the "backdrop_drupal_compatibility" option is enabled in your site's…

File

core/includes/drupal.inc, line 64
Contains constants and function wrappers for Drupal 7.x compatibility.

Code

define('DRUPAL_OPTIONAL', 1)