What are the common pitfalls when using PHP functions to generate complex HTML structures like tables?

One common pitfall when using PHP functions to generate complex HTML structures like tables is the lack of readability and maintainability in the code. To solve this, consider using a template engine like Twig or Blade to separate the HTML structure from the PHP logic, making it easier to manage and update the code.

```php
// Example using Twig template engine
require_once 'vendor/autoload.php';

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

$data = [
    'tableData' => [
        ['Name' => 'John', 'Age' => 25],
        ['Name' => 'Jane', 'Age' => 30],
    ]
];

echo $twig->render('table.twig', $data);
```

In this example, we are using Twig template engine to separate the HTML structure from the PHP logic. The table data is passed to the template as an array, making it easier to manage and update the code.