Display message on AdminHomepage via Hook

[Syrtox]

Hello Community,

The following use case should be implemented:

If the admin accepts an order within the admin area, business logic is executed within the "AcceptOrder" hook and if an error occurs, an error message should appear in the "AdminHomepage" template or similar.

Similar to this post:

 

The "AcceptOrder" hook has no return. The only option I have researched is to throw an exception, as in this example:

<?php
//currently
add_hook('AcceptOrder', 1, function($vars) {
  
   //...do business logic
   if($something == "error"){
      throw new Exception("OrderAccept Exception!");
   }  
});



//What I'm looking for
add_hook('AcceptOrder', 1, function($vars) {   
   global $errormessage;  
   
   //...do business logic
   if($something == "error"){
      //.....
      $errormessage = 'ERROR_MESSAGE'; //will show on AdminHomepage or similar
   }  
});

 

Is this possible?