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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 |
---|---|
1380 | $type = 'taxonomy'; |
1381 | $callback = 'wp_nav_menu_item_taxonomy_meta_box'; |
1382 | $items = (array) get_taxonomies( array( 'show_ui' => true ), 'object' ); |
1383 | } |
1384 |
|
1385 | if ( ! empty( $_POST['item-object'] ) && isset( $items[$_POST['item-object']] ) ) { |
1386 | $menus_meta_box_object = $items[ $_POST['item-object'] ]; |
1387 |
|
1388 | /** This filter is documented in wp-admin/includes/nav-menu.php */ |
1389 | $item = apply_filters( 'nav_menu_meta_box_object', $menus_meta_box_object ); |
1390 | ob_start(); |
1391 | call_user_func_array($callback, array( |
1392 | null, |
1393 | array( |
1394 | 'id' => 'add-' . $item->name, |
1395 | 'title' => $item->labels->name, |
1396 | 'callback' => $callback, |
1397 | 'args' => $item, |
1398 | ) |