A workflow that assigns invoices to the current user after saving

[Guido1982]

I have this workflow custom function in place:

PHP Code:

function updateInvoiceAssignedTo($entity) {
    global $adb,$default_charset,$log,$current_user;

    list($invoice,$invoice_crm_id) = explode('x',$entity->data['id']);  // separate webservice ID
    if (getSalesEntityType($invoice_crm_id)=='Invoice') {

        // Get the current user from the session
        $user = new Users();
        $user->retrieveCurrentUserInfoFromFile($_SESSION['authenticated_user_id']);

        // list($usr,$usr_id) = explode('x', $entity->data['assigned_user_id']);
        $query = 'UPDATE vtiger_crmentity SET smownerid=? WHERE crmid=?';
        $params = array($user->id, $invoice_crm_id);
        $adb->pquery($query, $params);
    }
} 


But not able to test it, would the getting of the current user ID work by getting it from the session?