class User { public $username; public $email; function __construct($username, $email) { $this->username = $username; $this->email = $email; } }In this example, whenever we create a new User object, we will pass in two arguments for the username and email properties, respectively. The __construct method, in turn, initializes these properties with the value of the arguments passed in. This code example likely belongs to a package or library related to object-oriented programming in PHP, as the use of constructors is a core concept in [OOP](https://en.wikipedia.org/wiki/Object-oriented_programming). Another example where __construct is commonly used is in the classes of popular PHP frameworks, such as Laravel and Symfony, which use constructor injection to inject dependencies into a class upon instantiation.