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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 691 | /** |
| 692 | * Filter the navigation menu items being returned. |
| 693 | * |
| 694 | * @since 3.0.0 |
| 695 | * |
| 696 | * @param array $items An array of menu item post objects. |
| 697 | * @param object $menu The menu object. |
| 698 | * @param array $args An array of arguments used to retrieve menu item objects. |
| 699 | */ |
| 700 | return apply_filters( 'wp_get_nav_menu_items', $items, $menu, $args ); |
| 701 | } |
| 702 | |
| 703 | /** |
| 704 | * Decorates a menu item object with the shared navigation menu item properties. |
| 705 | * |
| 706 | * Properties: |
| 707 | * - ID: The term_id if the menu item represents a taxonomy term. |
| 708 | * - attr_title: The title attribute of the link element for this menu item. |
| 709 | * - classes: The array of class attribute values for the link element of this menu item. |