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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 |
---|---|
208 | // Set up the $menu_item variables |
209 | _wp_menu_item_classes_by_context( $menu_items ); |
210 |
|
211 | $sorted_menu_items = array(); |
212 | foreach ( (array) $menu_items as $key => $menu_item ) |
213 | $sorted_menu_items[$menu_item->menu_order] = $menu_item; |
214 |
|
215 | unset($menu_items); |
216 |
|
217 | $sorted_menu_items = apply_filters( 'wp_nav_menu_objects', $sorted_menu_items, $args ); |
218 |
|
219 | $items .= walk_nav_menu_tree( $sorted_menu_items, $args->depth, $args ); |
220 | unset($sorted_menu_items); |
221 |
|
222 | // Attributes |
223 | if ( ! empty( $args->menu_id ) ) { |
224 | $wrap_id = $args->menu_id; |
225 | } else { |
226 | $wrap_id = 'menu-' . $menu->slug; |