How do professionals typically handle placeholder notation in PHP templates?

Professionals typically handle placeholder notation in PHP templates by using a templating engine like Twig or Blade. These engines allow developers to use placeholders like {{ variable }} in their templates, which are then replaced with actual values when the template is rendered. This helps separate the presentation logic from the business logic in the application. 

// Example using Twig templating engine
$loader = new \Twig\Loader\FilesystemLoader('/path/to/templates');
$twig = new \Twig\Environment($loader);

$template = $twig->load('index.html');
echo $template->render(['variable' => 'Hello, World!']);

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PHP templates placeholder notation professionals handling best practices

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