Adds a submenu page to the Appearance main menu.
Description
This function takes a capability which will be used to determine whether or not a page is included in the menu.
The function which is hooked in to handle the output of the page must check that the user has the required capability as well.
Parameters
$page_title
stringrequired- The text to be displayed in the title tags of the page when the menu is selected.
$menu_title
stringrequired- The text to be used for the menu.
$capability
stringrequired- The capability required for this menu to be displayed to the user.
$menu_slug
stringrequired- The slug name to refer to this menu by (should be unique for this menu).
$callback
callableoptional- The function to be called to output the content for this page.
Default:
''
$position
intoptional- The position in the menu order this item should appear.
Default:
null
Source
function add_theme_page( $page_title, $menu_title, $capability, $menu_slug, $callback = '', $position = null ) {
return add_submenu_page( 'themes.php', $page_title, $menu_title, $capability, $menu_slug, $callback, $position );
}
This is from the WordPress Codex, which states that add_theme_page must be called early. Therefore, calling the function in the ‘admin_init’ hook will make role capabilities invalid in regard to theme page created.
Use the ‘admin_menu’ hook instead using an example as shown: