How to create sub menu with a URL parameter?

3 comments

1. You’d have to manipulate the global $submenu and modify the link in it. Or use jQuery.

   The following example adds a submenu in the Dashboard menu and changes the destination link just after. The submenu page will dump the contents of the global var.

   add_action( 'admin_menu', function()
   {
       add_submenu_page(  
           'index.php',                  
           'Sandbox Options',          
           'Options',                  
           'administrator',            
           'sandbox_options',    
           function() { global $submenu; var_dump($submenu); }
       );
       global $submenu; 
       $submenu['index.php'][11][2] = 'index.php?page=sandbox_options&tab=3';
   });
   

   [Update]

   The example given, Redux Framework, uses the following technique:

   • Add a menu page with a slug example_slug.

   • Add the submenu pages and use the same slug example_slug + &tab=N.

   • All the menu and submenu pages are rendered with the menu callback. The submenu have null callbacks.

   Example:

   add_submenu_page(  
       'sandbox',                  
       'Sandbox Options',          
       'Options',                  
       'add_users',            
       'sandbox&tab=4',    
       '__return_null'
   ); 
   

2. Basically you need to reconstruct the url, because plugin_basename will strip your extra query args after you register the page with query args.

   Full (working/tested) solution follows:

   define( 'PARENT_SLUG', 'index.php' ); // where to put the submenu
   define( 'PAGE_SLUG', 'wp190913_options' ); // submenu slug
   define( 'EXTRA_ARG', 'tab' );
   define( 'EXTRA_ARG_VALUE', 4 );
   
   add_action( 'admin_menu', 'wp190913_add_page', 11 );
   add_action( 'admin_menu', 'wp190913_add_page_args', 12 );
   
   /**
    * Register submenu page
    */
   function wp190913_add_page() {
       add_submenu_page(
           PARENT_SLUG,
           __('wp190913 Options', 'wp190913_textdomain' ),
           __('wp190913 Options', 'wp190913_textdomain'),
           'manage_options',
           PAGE_SLUG,
           'wp190913_display_page'
       );
   }
   
   /**
    * Add extra query arg for submenu page
    */
   function wp190913_add_page_args() {
       global $submenu;
   
       $position = wp190913_search_submenu( PAGE_SLUG, PARENT_SLUG );
   
       // make sure we modify our page
       if ( is_int($position) && $submenu[PARENT_SLUG][$position][2] == PAGE_SLUG ) {
           // we will recompose the whole url, starting with parent
           $submenu[PARENT_SLUG][$position][2] = add_query_arg( 'page', PAGE_SLUG, PARENT_SLUG );
           $submenu[PARENT_SLUG][$position][2] = add_query_arg( EXTRA_ARG, EXTRA_ARG_VALUE, $submenu[PARENT_SLUG][$position][2] );
       }
   
   }
   
   /**
    * Find submenu key in it's parent array.
    *
    * @param string $page_slug
    * @param string $parent_slug
    *
    * @return null
    */
   function wp190913_search_submenu( $page_slug, $parent_slug ) {
       global $submenu;
   
       if ( !isset( $submenu[$parent_slug] ) )
           return null;
   
       foreach ( $submenu[$parent_slug] as $i => $item ) {
           if ( $page_slug == $item[2] ) {
               return $i;
           }
       }
   
       return null;
   }
   
   /**
    * Submenu page content.
    */
   function wp190913_display_page() {
       // Do stuff
   
       echo 'wp190913_display_page';
   }
   

3. I solved it like this:

   class Banner{
       
       function __construct(){
           
           add_action('admin_menu', array($this,'adminmenu'), 200);
           
       }
       
       function adminmenu(){
           
           add_submenu_page( 
                               'adrotate', 
                               'AdRotate Pro · ' . __('Banner Tags', 'adrotate-pro'), 
                               __('Banner Tags', 'adrotate-pro'), 
                               'adrotate_ad_manage', 
                               'adrotate-banner-tags', 
                               array($this,'adrotate_banner_tags')
                       );
       }
       
       function adrotate_banner_tags(){
           
           wp_safe_redirect(admin_url('/edit-tags.php?taxonomy=' . TAX_TAGS));
           exit;
           
       }
   }
   new Banner();
   

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