require_once('./common/models/User.php'); $user = User::find(123); // Finds the user with ID 123 if ($user) { // User is found, do something... }In this example, we require the User model class and call the find method to retrieve the user with ID 123 from the database. If the user is found, we can then perform some action or return their data in the application. The common.models package library is likely a collection of PHP classes and functions for working with database models in web applications. It may include CRUD (create, read, update, delete) methods for interacting with different types of entities, such as users, products, or orders.