How to add a custom action to the context menu of an infoblock element?

Question

PHP

using an example from the documentation , I added my group action to the context menu of the infoblock elements, but I can’t catch the action itself

AddEventHandler("main", "OnAdminListDisplay", "MyOnAdminListDisplay");
function MyOnAdminListDisplay(&$list)
{
    //add custom group action

        $list->arActions["create_dublicat"] = "Создать дубликат";
}
//process custom action
AddEventHandler("main", "OnBeforeProlog", "CreateDublFunc");
function CreateDublFunc()
{
   if($_SERVER["REQUEST_METHOD"] == "POST" && $_POST["action"] == "create_dublicat" && is_array($_POST["ID"]))
   {
        if(CModule::IncludeModule("iblock"))
        {
        	#код
        }
     }
}

Answer 1

spaces are resolved, for some reason there was an 'E' character at the beginning of the infoblock record ID, so the script did not work