Private Properties in Inheritance in OOP in PHP

Private properties are not inherited. But a descendant can manipulate them through the parent's public methods. Let's see it in practice. Suppose we have the following parent class with a private property and its getter and setter:

<?php
	class User {
		private $name;
		
		public function setName($name) {
			$this->name = $name;
		}
		public function getName() {
			return $this->name;
		}
	}
?>

Let the following descendant inherit from this parent:

<?php
	class Student extends User {
		
	}
?>

Let's create an object of the descendant:

<?php
	$student = new Student;
?>

Let's use the parent's method to set its private property:

<?php
	$student->setName('john');
?>

Let's use the parent's method to read its private property:

<?php
	$name = $student->getName();
	echo $name;
?>

Given the following parent class:

<?php
	class User {
		private $name;
		private $surn;
		
		public function setName($name) {
			$this->name = $name;
		}
		public function getName() {
			return $this->name;
		}
		
		public function setSurn($surn) {
			$this->surn = $surn;
		}
		public function getSurn() {
			return $this->surn;
		}
	}
?>

Make a class Employee, which will inherit from this parent.

Create an object of the class Employee and call the inherited setters and getters.

In the class Employee, make the following method:

<?php
	public function getFull() {
		return $this->name . ' ' . $this->surn;
	}
?>

Make sure the method's code leads to an error.