How can the EVA principle (Separation of concerns) be applied to improve the readability of PHP code?

The EVA principle (Separation of concerns) can be applied to improve the readability of PHP code by breaking down the code into distinct sections that handle specific tasks. This separation helps in organizing the code logically, making it easier to understand and maintain. By separating concerns such as business logic, presentation, and data access, the code becomes more modular and easier to test. 

// Example of separating concerns in PHP code

// Business logic
function calculateTotal($items) {
    $total = 0;
    foreach ($items as $item) {
        $total += $item['price'] * $item['quantity'];
    }
    return $total;
}

// Presentation
function displayTotal($total) {
    echo "Total: $" . $total;
}

// Data access
function getItemsFromDatabase() {
    // Code to fetch items from database
    return $items;
}

// Main code
$items = getItemsFromDatabase();
$total = calculateTotal($items);
displayTotal($total);

Keywords

EVA principle Separation of concerns PHP code readability improve

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