Accessing Property by Variable Name in OOP in PHP

You can access object properties by a variable name. Let's see how this can be done. Suppose we have the following class User:

<?php
	class User
	{
		public $name;
		public $surn;
		
		public function __construct($name, $surn)
		{
			$this->name = $name;
			$this->surn = $surn;
		}
	}
?>

Let's create an object of this class:

<?php
	$user = new User('john', 'smit');
?>

Let's output the value of its property:

<?php
	echo $user->name; // outputs 'john'
?>

Suppose we have a variable that stores the property name:

<?php
	$prop = 'name';
?>

Now let's use the variable value as the property name:

<?php
	$prop = 'name';
	echo $user->$prop; // outputs 'john'
?>

Given the following class:

<?php
	class Employee
	{
		public $name;
		public $salary;
		
		public function __construct($name, $salary)
		{
			$this->name = $name;
			$this->salary = $salary;
		}
	}
?>

Given the following variables:

<?php
	$prop1 = 'name';
	$prop2 = 'salary';
?>

Create an object of the Employee class, and then access its properties through the given variables.