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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 |
|---|---|
| 1171 | $callback = 'wp_nav_menu_item_post_type_meta_box'; |
| 1172 | $items = (array) get_post_types( array( 'show_in_nav_menus' => true ), 'object' ); |
| 1173 | } elseif ( isset( $_POST['item-type'] ) && 'taxonomy' == $_POST['item-type'] ) { |
| 1174 | $type = 'taxonomy'; |
| 1175 | $callback = 'wp_nav_menu_item_taxonomy_meta_box'; |
| 1176 | $items = (array) get_taxonomies( array( 'show_ui' => true ), 'object' ); |
| 1177 | } |
| 1178 | |
| 1179 | if ( ! empty( $_POST['item-object'] ) && isset( $items[$_POST['item-object']] ) ) { |
| 1180 | $item = apply_filters( 'nav_menu_meta_box_object', $items[ $_POST['item-object'] ] ); |
| 1181 | ob_start(); |
| 1182 | call_user_func_array($callback, array( |
| 1183 | null, |
| 1184 | array( |
| 1185 | 'id' => 'add-' . $item->name, |
| 1186 | 'title' => $item->labels->name, |
| 1187 | 'callback' => $callback, |
| 1188 | 'args' => $item, |
| 1189 | ) |