How can the code be refactored to improve readability and maintainability?

The code can be refactored by breaking down the logic into smaller, more manageable functions and using meaningful variable names. This will improve readability and maintainability by making the code easier to understand and update in the future. 

function calculateTotalPrice($items) {
    $totalPrice = 0;
    
    foreach ($items as $item) {
        $totalPrice += $item['price'] * $item['quantity'];
    }
    
    return $totalPrice;
}

function generateInvoice($customerName, $items) {
    $totalPrice = calculateTotalPrice($items);
    
    $invoice = "Invoice for: $customerName\n";
    $invoice .= "Items:\n";
    
    foreach ($items as $item) {
        $invoice .= "- {$item['name']} x {$item['quantity']} = {$item['price']}\n";
    }
    
    $invoice .= "Total Price: $totalPrice";
    
    return $invoice;
}

$customerName = "John Doe";
$items = [
    ['name' => 'Item 1', 'price' => 10, 'quantity' => 2],
    ['name' => 'Item 2', 'price' => 20, 'quantity' => 1]
];

$invoice = generateInvoice($customerName, $items);
echo $invoice;

Keywords

refactoring readability maintainability PHP functions code organization

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