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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.
This hook occurs 2 times in this file.
Line | Code |
---|---|
220 | * |
221 | * If a falsey value is returned instead of an object, the menu items |
222 | * meta box for the current meta box object will not be added. |
223 | * |
224 | * @since 3.0.0 |
225 | * |
226 | * @param WP_Post_Type|false $post_type The current object to add a menu items |
227 | * meta box for. |
228 | */ |
229 | $post_type = apply_filters( 'nav_menu_meta_box_object', $post_type ); |
230 | if ( $post_type ) { |
231 | $id = $post_type->name; |
232 | // Give pages a higher priority. |
233 | $priority = ( 'page' === $post_type->name ? 'core' : 'default' ); |
234 | add_meta_box( "add-post-type-{$id}", $post_type->labels->name, 'wp_nav_menu_item_post_type_meta_box', 'nav-menus', 'side', $priority, $post_type ); |
235 | } |
236 | } |
237 | } |
238 |
|
Line | Code |
244 | function wp_nav_menu_taxonomy_meta_boxes() { |
245 | $taxonomies = get_taxonomies( array( 'show_in_nav_menus' => true ), 'object' ); |
246 |
|
247 | if ( ! $taxonomies ) { |
248 | return; |
249 | } |
250 |
|
251 | foreach ( $taxonomies as $tax ) { |
252 | /** This filter is documented in wp-admin/includes/nav-menu.php */ |
253 | $tax = apply_filters( 'nav_menu_meta_box_object', $tax ); |
254 | if ( $tax ) { |
255 | $id = $tax->name; |
256 | add_meta_box( "add-{$id}", $tax->labels->name, 'wp_nav_menu_item_taxonomy_meta_box', 'nav-menus', 'side', 'default', $tax ); |
257 | } |
258 | } |
259 | } |
260 |
|
261 | /** |
262 | * Check whether to disable the Menu Locations meta box submit button and inputs. |