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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 |
|---|---|
| 450 | * @since 3.0.0 |
| 451 | */ |
| 452 | function wp_nav_menu_post_type_meta_boxes() { |
| 453 | $post_types = get_post_types( array( 'show_in_nav_menus' => true ), 'object' ); |
| 454 | |
| 455 | if ( ! $post_types ) |
| 456 | return; |
| 457 | |
| 458 | foreach ( $post_types as $post_type ) { |
| 459 | $post_type = apply_filters( 'nav_menu_meta_box_object', $post_type ); |
| 460 | if ( $post_type ) { |
| 461 | $id = $post_type->name; |
| 462 | // give pages a higher priority |
| 463 | $priority = ( 'page' == $post_type->name ? 'core' : 'default' ); |
| 464 | add_meta_box( "add-{$id}", $post_type->labels->name, 'wp_nav_menu_item_post_type_meta_box', 'nav-menus', 'side', $priority, $post_type ); |
| 465 | } |
| 466 | } |
| 467 | } |
| 468 | |
| Line | Code |
| 472 | * @since 3.0.0 |
| 473 | */ |
| 474 | function wp_nav_menu_taxonomy_meta_boxes() { |
| 475 | $taxonomies = get_taxonomies( array( 'show_in_nav_menus' => true ), 'object' ); |
| 476 | |
| 477 | if ( !$taxonomies ) |
| 478 | return; |
| 479 | |
| 480 | foreach ( $taxonomies as $tax ) { |
| 481 | $tax = apply_filters( 'nav_menu_meta_box_object', $tax ); |
| 482 | if ( $tax ) { |
| 483 | $id = $tax->name; |
| 484 | add_meta_box( "add-{$id}", $tax->labels->name, 'wp_nav_menu_item_taxonomy_meta_box', 'nav-menus', 'side', 'default', $tax ); |
| 485 | } |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | /** |
| 490 | * Displays a metabox for the nav menu theme locations. |