What are the potential pitfalls of using ob_start and ob_get_contents in PHP?

One potential pitfall of using ob_start and ob_get_contents in PHP is that if output buffering is not properly managed, it can lead to unexpected behavior and memory consumption issues. To avoid this, it's important to always call ob_end_clean or ob_end_flush after retrieving the buffered content with ob_get_contents.

ob_start();
echo "Hello, World!";
$content = ob_get_contents();
ob_end_clean();

// Use $content as needed