tell, dont ask example

telldontask.php

<?php
 
class InvoiceManager
{
    private $em;
    
    private $invoiceRepo;
    
    private $highValue;
 
    public function __construct(EntityManager $em, $highValue)
    {
        $this->em = $em;
        $this->invoiceRepo = $em->getRepository('Invoice');
        $this->highValue = $highValue;
    }
 
    public function getInvoice($id)
    {
        return $this->invoiceRepo->find($id);
    }
 
    public function isHighValuedInvoice($id)
    {
        return $this->getInvoice($id)->getTotal() > $this->highValue;
    }
}

class IndexController extends Controller
{
    public function indexAction() 
    {
        $invoiceManager = $this->container->get('manager.invoice')
     
        $this->view->highValuedInvoice = $invoiceManager->isHighValuedInvoice($id);
        
    }
}