Drupal’s menu system is complex but powerful. The term “menu system” is somewhat of a misnomer. It may be better to think of the menu system as having three primary responsibilities: callback mapping, access control, and menu customization. Essential code for the menu system is in includes/menu.inc, while optional code that enables such features as customizing menus is in modules/menu.
KeywordsLocal Task Menu Item Load Function Router Table Navi Gation
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