It must be pretty late in the action order because I’ve tried hooking to admin_notices from it and it doesn’t work. $function callback (param of add_submenu_page) is used to output the content of admin pages, so it runs when WordPress is actually displaying the markup (body) of page. That should be pretty clear because you … Read more
For your particular situation, where you need to have a menu registered, but not shown unless you click on it from a link on another page you can add a conditional check to see if you’re on the editing page. If so, then change replace null with book per the add_submenu_page() parameters. add_action( ‘admin_menu’, ‘add_the_menus’ … Read more
You can also change the menu with the global variables of WordPress for display the menu and submenu. All first items are in the var $menu and all suparts are in $submenu. Also a small example for change the order of the submenu-items with edit.php. Add thius plugin and see the result via debugging. The … Read more
It is a valid question and an issue I have encountered as well. I did not go through the WP core code to see why the title is missing, but I can offer a solution using the admin_title filter, for people facing a similar problem: function fix_your_page_title( $admin_title, $title ) { if ( get_current_screen()->id === … Read more
This plugin will allow you to display your menu items based on the user role on your WordPress site: Nav Menu Roles. If you have a link in the menu that you only want to show to your vendors only, you can toggle that in the Menu page:
How do I add a Gutenberg editor to a custom options page
Themes are required to use add_theme_page() in the WordPress Theme Directory. You need: add_theme_page( $this->strings[‘page_title’], // Page title $this->strings[‘menu_title’], // Menu title ‘edit_theme_options’, // Capability $this->menu, // Menu slug array( &$this, ‘install_plugins_page’ ) // Callback ); s add_theme_page(theme_name.’ Settings’, theme_name ,’install_themes’, ‘panel’ , ‘panel_options’); $theme_page = add_theme_page(‘Settings’, theme_name.’ Settings’,’install_themes’, ‘panel’ , ‘panel_options’); add_theme_page(theme_name.’ Documentation’, ‘Documentation’,’install_themes’, … Read more
You can set slug of a subpage to be the same as slug of parent page. For example: public function onixion_admin_menu_option() { add_menu_page(‘onixion’, ‘Onixion’, ‘manage_options’, ‘onixion-admin-menu’, array(&$this, ‘onixion_main_page’ ), ‘dashicons-chart-area’, ‘200’ ); add_submenu_page( ‘onixion-admin-menu’, ‘scripts’, ‘Scripts’, ‘manage_options’, ‘onixion-admin-menu’, // <– here we set the same slug as for parent page array(&$this, ‘onixion_scripts_page’ ) ); add_submenu_page( … Read more
add_submenu_page() and similar functions accept a capability. Capabilities are slightly confusing in WordPress as every role name is a cap as well. So instead of just adding a role name, you could just take a capability that is shared between the roles of the Subscribers and the Editors. As you can see from the capabilities … Read more
How to change menu page capability