Symfony2 fixing array to string error

Question

I have a twig extension function created that count the total prices of items:

public function getTotal($items)
    {
    $total = array();
    foreach($items as $item){
        $total[] = $item->getPrice() - $item->getDiscount() + $item->getValue();
    }
    return $total;
    }

However when I display them i get error: array to string conversion

I am displaying like this:

{{getTotalTax(product)}}

I tried doing this which didnt help:

public function getTotal($items)
    {
    $totals = array();
    foreach($items as $item){
        $totals[] = $item->getPrice() - $item->getDiscount() + $item->getValue();

         if(is_array($totals)) {
        return '';
        }
    }
    return $totals;
    }

Answer 1

Your code is returning an array.

I assume you want to either:

• return each total in an array: price - discount + value for each item.
  In this case you need to fix your display function to get each total out of the array and print it out. eg

.

function print_totals($totals){
    foreach ($totals as $total){
       echo $total;
    } 
}

it's hard to say exactly what you're trying to do from your question, as you have your 'display' calling getTotalTax(product) where product seems to be a single item, but the function you pasted is called getTotal() which assumes an array of $items .

You might want to update a property on each item like so:

public function getTotal($items)
{
    $total = array();
    foreach($items as $item){
        $item->total = $item->getPrice() - $item->getDiscount() + $item->getValue();
    }
    return true;
}

OR

• return the grand total
  In this case you will need to keep adding to the total, like so:

.

public function getTotal($items)
{    
    $total = 0;
    foreach($items as $item){
        $total += $item->getPrice() - $item->getDiscount() + $item->getValue();

    }
    return $total;
}

Answer 2

You are indeed returning an array and it cannot be converted to string. Depending what exactly you want you can return for example

return print_r($totals, true);

Otherwise you can extract individual elements from your HTML template and output these.