How can one ensure proper data sharing between objects in PHP inheritance?

To ensure proper data sharing between objects in PHP inheritance, you can use protected properties in the parent class and access them in the child classes using getter and setter methods. This way, the child classes can access and modify the data stored in the parent class without directly manipulating the properties. 

<?php

class ParentClass {
    protected $sharedData;

    public function getSharedData() {
        return $this->sharedData;
    }

    public function setSharedData($data) {
        $this->sharedData = $data;
    }
}

class ChildClass extends ParentClass {
    public function __construct() {
        $this->setSharedData("Hello, World!");
    }

    public function displaySharedData() {
        echo $this->getSharedData();
    }
}

$child = new ChildClass();
$child->displaySharedData(); // Output: Hello, World!

?>

Keywords

PHP inheritance data sharing objects parent class child class

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