What are some potential pitfalls of including HTML within PHP classes?

Potential pitfalls of including HTML within PHP classes include mixing presentation logic with business logic, making code harder to maintain and debug. To solve this issue, it is recommended to separate HTML markup from PHP logic by using a template engine like Twig or Blade. 

<?php

// Using a template engine like Twig
require_once 'vendor/autoload.php';

$loader = new \Twig\Loader\FilesystemLoader('templates');
$twig = new \Twig\Environment($loader);

echo $twig->render('index.html', ['variable' => $value]);

?>

Keywords

HTML PHP classes security vulnerabilities cross-site scripting code readability

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