Bot program to count the products bought in the supermarket, with total sum.

<?php
$products_bought = array("cucumbers", "milk", "bread", "oil", "butter");
$products_prices = array(1.5, 2.5, 2, 1.5, 3);
$total_sum = 0;

function count_products($products_bought, $products_prices)
{
    $counter = count($products_bought);
    $total_sum = 0;
    for ($i = 0; $i < $counter; $i++) {
        echo "Product $i : $products_bought[$i] - costs $products_prices[$i] \n";
        $total_sum += $products_prices[$i];
    }
    return $total_sum;
}

$total_sum = count_products($products_bought, $products_prices);
echo "Total cost is $total_sum";

?>