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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 |
|---|---|
| 1503 | $type = 'taxonomy'; |
| 1504 | $callback = 'wp_nav_menu_item_taxonomy_meta_box'; |
| 1505 | $items = (array) get_taxonomies( array( 'show_ui' => true ), 'object' ); |
| 1506 | } |
| 1507 | |
| 1508 | if ( ! empty( $_POST['item-object'] ) && isset( $items[$_POST['item-object']] ) ) { |
| 1509 | $menus_meta_box_object = $items[ $_POST['item-object'] ]; |
| 1510 | |
| 1511 | /** This filter is documented in wp-admin/includes/nav-menu.php */ |
| 1512 | $item = apply_filters( 'nav_menu_meta_box_object', $menus_meta_box_object ); |
| 1513 | ob_start(); |
| 1514 | call_user_func_array($callback, array( |
| 1515 | null, |
| 1516 | array( |
| 1517 | 'id' => 'add-' . $item->name, |
| 1518 | 'title' => $item->labels->name, |
| 1519 | 'callback' => $callback, |
| 1520 | 'args' => $item, |
| 1521 | ) |