How can PHP developers ensure proper separation of concerns between PHP logic and HTML presentation when outputting data in a table format?

To ensure proper separation of concerns between PHP logic and HTML presentation when outputting data in a table format, PHP developers can use a templating engine like Twig or Blade. These templating engines allow developers to separate the PHP logic from the HTML presentation by using templates that contain placeholders for dynamic data. This way, the PHP logic can handle data manipulation and retrieval, while the HTML presentation can focus on displaying the data in a visually appealing format.

```php
<?php
// Sample data to be displayed in a table
$data = [
    ['name' => 'John Doe', 'age' => 30],
    ['name' => 'Jane Smith', 'age' => 25],
    ['name' => 'Alice Johnson', 'age' => 35]
];

// Using Twig templating engine to separate PHP logic from HTML presentation
require_once 'vendor/autoload.php';
$loader = new \Twig\Loader\FilesystemLoader('templates');
$twig = new \Twig\Environment($loader);

// Render the template with the data
echo $twig->render('table-template.twig', ['data' => $data]);
```

In the above code snippet, we are using the Twig templating engine to separate the PHP logic from the HTML presentation. The data is passed to the Twig template 'table-template.twig' for rendering in a table format. This approach ensures proper separation of concerns and makes the code more maintainable and easier to read.