What are the best practices for handling objects within objects in PHP?

When handling objects within objects in PHP, it is important to ensure proper encapsulation and maintain clear relationships between the objects. One best practice is to use object-oriented programming principles such as composition and inheritance to organize and manage the objects effectively. Additionally, consider using getter and setter methods to access and modify object properties securely.

class InnerObject {
    private $property;

    public function getProperty() {
        return $this->property;
    }

    public function setProperty($value) {
        $this->property = $value;
    }
}

class OuterObject {
    private $innerObject;

    public function __construct() {
        $this->innerObject = new InnerObject();
    }

    public function getInnerObjectProperty() {
        return $this->innerObject->getProperty();
    }

    public function setInnerObjectProperty($value) {
        $this->innerObject->setProperty($value);
    }
}

$outerObject = new OuterObject();
$outerObject->setInnerObjectProperty("Value");
echo $outerObject->getInnerObjectProperty(); // Output: Value