Bj?rn Nordqvist

The way i have gone about to simplify the backend for my clients is by using this plugin:

https://www.ads-software.com/extend/plugins/members/

With it you can set specific privileges for a user role (e.g. ‘contributor’). You can prevent the user from changing core settings, theme options, deleting post etc. For admin pages that can’t be removed by changing privileges you can use these functions:

https://codex.www.ads-software.com/Function_Reference/remove_submenu_page
https://codex.www.ads-software.com/Function_Reference/remove_menu_page

To prevent the pages to be removed from the admin user set the functions inside a conditional statment like so:

function my_remove_menu_pages() {
   if ( current_user_can('administrator') == false ) {
      remove_menu_page('link-manager.php');
   }
} add_action( 'admin_menu', 'my_remove_menu_pages' );

Hope this was helpfull!

I have never actually used this function but i would probably solve this by a conditional statement to define whether the value is already defined or successfully set.

If ( get_user_meta($uid, "mykey", true) == "myvalue" ) {
   $status = true;
} else {
   $status = update_user_meta($uid, "mykey", "myvalue");
}

if ( $status == true ) {
   // Function called on sucess
}