How can the design and structure of a PHP application be optimized to improve the readability and maintainability of the code, particularly when working with templates and database queries?

To improve the readability and maintainability of a PHP application, particularly when working with templates and database queries, it is recommended to separate concerns by using a template engine like Twig for rendering views and an ORM like Eloquent for handling database queries. This helps in keeping the code organized and easier to maintain by abstracting away the complex logic into separate components. 

// Example using Twig for templating and Eloquent for database queries

// Include Twig autoload file
require_once 'vendor/autoload.php';

// Initialize Twig
$loader = new \Twig\Loader\FilesystemLoader('path/to/templates');
$twig = new \Twig\Environment($loader);

// Initialize Eloquent
use Illuminate\Database\Capsule\Manager as Capsule;
$capsule = new Capsule;
$capsule->addConnection([
    'driver'    => 'mysql',
    'host'      => 'localhost',
    'database'  => 'database',
    'username'  => 'root',
    'password'  => 'password',
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
]);
$capsule->bootEloquent();

// Example query using Eloquent
$users = User::where('age', '>', 18)->get();

// Render template using Twig
echo $twig->render('index.html', ['users' => $users]);

Keywords

PHP application design code readability maintainability database queries

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