How can a PHP developer effectively handle the replacement of variables in an HTML template using a template engine, and what are some recommended template engine options for this task?

When using a template engine in PHP to handle the replacement of variables in an HTML template, developers can effectively do so by using the template engine's syntax to insert variables dynamically. This helps separate the logic from the presentation layer, making the code more maintainable and easier to read. Some recommended template engine options for this task include Twig, Blade, and Smarty.

// Using Twig as the template engine
require_once 'vendor/autoload.php';

$loader = new Twig_Loader_Filesystem('templates');
$twig = new Twig_Environment($loader);

// Define variables to be replaced in the template
$data = [
    'title' => 'Welcome to our website',
    'content' => 'This is some sample content.',
];

// Render the template with the variables
echo $twig->render('index.html', $data);