// Retrieve the post content from the database $post = get_post($post_id); // Append the new comment text to the post content $new_content = $post->getContent() . "\n" . $comment_text; // Update the post content in the database $post->setContent($new_content); $post->save();In this example, we use the getContent method to retrieve the current content of the post, concatenate the new comment text onto the end of it, and then use the setContent method to update the post's content in the database. The package library for this method may vary depending on the framework or CMS being used. However, in many cases it may be included in a class or module specifically for working with posts or content management systems.