Online PHP editor | output for KB9GY

<?php class UserName { private string $value; public function __construct(string $value) { $this->value = $value; } public function __invoke() { return $this->value; } } class User { public UserName $name; public function __construct(string $name) { $this->name = new UserName($name); } } // this is run $name = new UserName('sample'); var_dump( $name() ); // this is not run... $user = new User('hoge'); var_dump( ($user->name)() );