Are there any recommended PHP libraries or classes for generating RSS feeds from database content?

To generate RSS feeds from database content in PHP, you can use the SimplePie library. SimplePie is a PHP library that can parse and generate RSS and Atom feeds easily. You can fetch data from your database, format it as RSS feed items, and then use SimplePie to generate the final RSS feed.

// Include SimplePie library
require_once('path/to/simplepie/library/SimplePie.php');

// Create a new SimplePie object
$feed = new SimplePie();

// Set feed title, description, and link
$feed->set_title('Your Feed Title');
$feed->set_description('Your Feed Description');
$feed->set_link('http://example.com/feed');

// Fetch database content and loop through each item
// Add database content as feed items
$items = get_database_content();
foreach ($items as $item) {
    $feed->add_item($item);
}

// Render the feed
$feed->init();
$feed->handle_content_type();
echo $feed->as_xml();