Menu capability in Wordpress

Question

Is it possible to specify two usergroups (e.g. admins and editors) into the admin menu capability field ? I tried the following but it doesnt work:

add_submenu_page(
     'my-top-level-handle',
     'Page title',
     'Sub-menu title',
      array('administrator', 'editor'),
     'my-submenu-handle',
     'my_magic_function'
);

error message:

Warning: Illegal offset type in isset or empty in C:\wamp\www\wordpress\wp-includes\capabilities.php on line 712

Answer 1

Capability parameter of add_submenu_page() function can only take a single capability, so if you are using the built in roles you can select a capability fro the long list that both administrators and editors have any of these (use any of these freely):

• moderate_comments
• manage_categories
• manage_links
• unfiltered_html
• edit_others_posts
• edit_pages
• edit_others_pages
• edit_published_pages
• publish_pages
• delete_pages
• delete_others_pages
• delete_published_pages
• delete_others_posts
• delete_private_posts
• edit_private_posts
• read_private_posts
• delete_private_pages
• edit_private_pages
• read_private_pages

Answer 2

As t31os said, you can use capabilities instead of roles there. One way to do this is to use core capabilities. (A more advanced method is to add a custom capability to the roles of your choice.) The default caps are in wp-admin/includes/schema.php in the functions called by populate_roles().

If you are using standard roles/caps, you can specify only admins and editors by the cap level_7 or edit_others_posts or several others.