selectDatabase('database_name'); $coll = $db->selectCollection('users'); // Collect user information from form $user_id = $_POST['user_id']; $first_name = $_POST['first_name']; $last_name = $_POST['last_name']; $email = $_POST['email']; // Update user information in the database $result = $coll->updateOne( ['user_id' => $user_id], ['$set' => ['first_name' => $first_name, 'last_name' => $last_name, 'email' => $email]] ); // Close database connection $client->close(); ?>In this example, we are updating the user information in a MongoDB database using PHP. Both of the above examples use native PHP functions to update user information in different types of databases. There are also third-party libraries available for PHP, such as the Doctrine ORM package or the Laravel framework, that provide additional functionality for working with databases and updating user information.