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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 |
|---|---|
| 506 | * Filter whether a menu items meta box will be added for the current post type. |
| 507 | * |
| 508 | * If a falsey value is returned instead of a post type object, |
| 509 | * the post type menu items meta box will not be added. |
| 510 | * |
| 511 | * @since 3.0.0 |
| 512 | * |
| 513 | * @param object $post_type The post type object to be used as a meta box. |
| 514 | */ |
| 515 | $post_type = apply_filters( 'nav_menu_meta_box_object', $post_type ); |
| 516 | if ( $post_type ) { |
| 517 | $id = $post_type->name; |
| 518 | // give pages a higher priority |
| 519 | $priority = ( 'page' == $post_type->name ? 'core' : 'default' ); |
| 520 | add_meta_box( "add-{$id}", $post_type->labels->name, 'wp_nav_menu_item_post_type_meta_box', 'nav-menus', 'side', $priority, $post_type ); |
| 521 | } |
| 522 | } |
| 523 | } |
| 524 | |
| Line | Code |
| 538 | * Filter whether a menu items meta box will be added for the current taxonomy. |
| 539 | * |
| 540 | * If a falsey value is returned instead of a taxonomy object, |
| 541 | * the taxonomy menu items meta box will not be added. |
| 542 | * |
| 543 | * @since 3.0.0 |
| 544 | * |
| 545 | * @param object $tax The taxonomy object to be used as a meta box. |
| 546 | */ |
| 547 | $tax = apply_filters( 'nav_menu_meta_box_object', $tax ); |
| 548 | if ( $tax ) { |
| 549 | $id = $tax->name; |
| 550 | add_meta_box( "add-{$id}", $tax->labels->name, 'wp_nav_menu_item_taxonomy_meta_box', 'nav-menus', 'side', 'default', $tax ); |
| 551 | } |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | /** |
| 556 | * Check whether to disable the Menu Locations meta box submit button |