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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 |
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542 | if ( ARRAY_A == $args['output'] ) { |
543 | $GLOBALS['_menu_item_sort_prop'] = $args['output_key']; |
544 | usort($items, '_sort_nav_menu_items'); |
545 | $i = 1; |
546 | foreach( $items as $k => $item ) { |
547 | $items[$k]->$args['output_key'] = $i++; |
548 | } |
549 | } |
550 |
|
551 | return apply_filters( 'wp_get_nav_menu_items', $items, $menu, $args ); |
552 | } |
553 |
|
554 | /** |
555 | * Decorates a menu item object with the shared navigation menu item properties. |
556 | * |
557 | * Properties: |
558 | * - db_id: The DB ID of this item as a nav_menu_item object, if it exists (0 if it doesn't exist). |
559 | * - object_id: The DB ID of the original object this menu item represents, e.g. ID for posts and term_id for categories. |
560 | * - type: The family of objects originally represented, such as "post_type" or "taxonomy." |