What are some potential pitfalls when using string manipulation methods to extract data from HTML in PHP?

One potential pitfall when using string manipulation methods to extract data from HTML in PHP is that the structure of the HTML may change, causing your extraction logic to break. To mitigate this, it's recommended to use a DOM parser like PHP's DOMDocument class, which provides a more robust and reliable way to extract data from HTML.

$html = '<div><p>Hello, World!</p></div>';
$dom = new DOMDocument();
$dom->loadHTML($html);

$paragraph = $dom->getElementsByTagName('p')->item(0)->nodeValue;
echo $paragraph; // Output: Hello, World!