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Source View: wp_edit_nav_menu_walker

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: 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.

Source View

Line Code
1064           $menu_items = wp_get_nav_menu_items( $menu->term_id, array('post_status' => 'any') );
1065           $result = '<div id="menu-instructions" class="post-body-plain';
1066           $result .= ( ! empty($menu_items) ) ? ' menu-instructions-inactive">' : '">';
1067           $result .= '<p>' . __('Select menu items (pages, categories, links) from the boxes at left to begin building your custom menu.') . '</p>';
1068           $result .= '</div>';
1069
1070           if( empty($menu_items) )
1071                return $result . ' <ul class="menu" id="menu-to-edit"> </ul>';
1072
1073           $walker_class_name = apply_filters( 'wp_edit_nav_menu_walker', 'Walker_Nav_Menu_Edit', $menu_id );
1074
1075           if ( class_exists( $walker_class_name ) )
1076                $walker = new $walker_class_name;
1077           else
1078                return new WP_Error( 'menu_walker_not_exist', sprintf( __('The Walker class named <strong>%s</strong> does not exist.'), $walker_class_name ) );
1079
1080           $some_pending_menu_items = false;
1081           foreach( (array) $menu_items as $menu_item ) {
1082                if ( isset( $menu_item->post_status ) && 'draft' == $menu_item->post_status )