Jina la Sifa kutoka kwa Kitu Kingine katika OOP katika PHP

Jina la sifa linaweza hata kuwa sifa ya kitu kingine . Hebu tuchukulie tuna darasa lifuatalo User:

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

Tutengeneze kitu cha darasa hili:

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

Hebu pia tuwe na darasa Prop, ambalo katika sifa value litakuwa na jina la sifa:

<?php
	class Prop
	{
		public $value;
		
		public function __construct($value)
		{
			$this->value = $value;
		}
	}
?>

Tutengeneze kitu cha darasa hili:

<?php
	$prop = new Prop('name'); 
?>

Sasa kwa kutumia kitu hiki tutoa jina la user:

<?php
	echo $user->{$prop->value}; // itatoa 'john'
?>

Kuna darasa lifuatalo:

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

Pia kuna darasa kama hili:

<?php
	class Data
	{
		public $prop1 = 'name';
		public $prop2 = 'salary';
		public $prop3 = 'position';
	}
?>

Zoezi: Toa sifa za kitu Employee kupitia kitu Data.