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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 |
|---|---|
| 1514 | if ( ! empty( $menu_obj->ID ) ) { |
| 1515 | $menu_obj = wp_setup_nav_menu_item( $menu_obj ); |
| 1516 | $menu_obj->title = empty( $menu_obj->title ) ? __( 'Menu Item' ) : $menu_obj->title; |
| 1517 | $menu_obj->label = $menu_obj->title; // Don't show "(pending)" in ajax-added items. |
| 1518 | $menu_items[] = $menu_obj; |
| 1519 | } |
| 1520 | } |
| 1521 | |
| 1522 | /** This filter is documented in wp-admin/includes/nav-menu.php */ |
| 1523 | $walker_class_name = apply_filters( 'wp_edit_nav_menu_walker', 'Walker_Nav_Menu_Edit', $_POST['menu'] ); |
| 1524 | |
| 1525 | if ( ! class_exists( $walker_class_name ) ) { |
| 1526 | wp_die( 0 ); |
| 1527 | } |
| 1528 | |
| 1529 | if ( ! empty( $menu_items ) ) { |
| 1530 | $args = array( |
| 1531 | 'after' => '', |
| 1532 | 'before' => '', |