Should I use the same variable name for my Twig template as the one I have in my controller?

Question

I'm going through Symfony2 start guide and my question is:

I have a database with columns: price,description,id,name Then in my controller I fetch these columns and display them via a twig template. Within my controller I do:

public function showAction($id)
    {
        $product = $this->getDoctrine()
            ->getRepository('AcmeStoreBundle:Product')
            ->find($id);

        if (!$product) {
            throw $this->createNotFoundException(
                'No product found for id '.$id
            );
        }

        $price = $product -> getPrice();
        $description = $product -> getDescription();
        return $this->render(
        'AcmeStoreBundle:Store:index.html.twig',
        array('id' => $id, 'price' => $price, 'description' => $description)
        );
    }

My question is, can I change $price,$description to call it whatever else...? or am I forced to keep mentioning these variables like they're named within the database?

basically, can I do:

$foo = $product -> getPrice();
$bar = $product -> getDescription();

And then in my render function do:

   return $this->render(
        'AcmeStoreBundle:Store:index.html.twig',
        array('uniquecode' => $id, 'cost' => $foo, 'message' => $bar)
        );

My question is two fold : 1) can I do it 2) is it a good practice to do it?

Answer 1

Better:

return $this->render('AcmeStoreBundle:Store:index.html.twig', array(
       'product' => $product
 ));

You access the product attributes in twig like this

{{ product.description }}

---

Use meaningful names for variables. Variable name must define the exact explanation of its content

I found it here http://codebuild.blogspot.de/2012/02/15-best-practices-of-variable-method.html but you can just google for variable and method naming