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<?php class Address { public $street; } class User { protected $address; public function getAddress() : Address { return $this->address; } public function setAddress(Address $address) { $this->address = $address; } } $user = new User(); $address = new Address(); $address->street = "Kozhikode"; $user->setAddress($address); $address = $user->getAddress(); var_dump($address->street);

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