constant MENU_MAX_DEPTH

The maximum depth of a menu links tree - matches the number of p columns.

Related topics

Menu system
Define the navigation menus, and route page requests to code based on URLs.
Menu tree parameters
Parameters for a menu tree.

File

includes/menu.inc, line 278
API for the Drupal menu system.

Code

define('MENU_MAX_DEPTH', 9)

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https://api.drupal.org/api/drupal/includes!menu.inc/constant/MENU_MAX_DEPTH/7.x