PHP da OOP da interfeyslarning bir-biridan meros olishi

Interfeyslar, xuddi klasslar kabi, extends operatori yordamida bir-biridan meros olishlari mumkin. Keling, buni bir misol orqali ko'rib chiqaylik. Faraz qilaylik, bizda oldingi darsdagı shunday bir interfeys mavjud:

<?php
	interface iRectangle
	{
		public function __construct($a, $b);
		public function getSquare();
		public function getPerimeter();
	}
?>

Biroq, bizda iFigure interfeysi allaqachon mavjud bo'lib, u bizning interfeysimizning bir qism metodlarini tavsiflaydi:

<?php
	interface iFigure
	{
		public function getSquare();
		public function getPerimeter();
	}
?>

Keling, iRectangle interfeysi iFigure interfeysining metodlaridan meros olsin:

<?php
	interface iRectangle extends iFigure
	{
		public function __construct($a, $b);
	}
?>

getName, setName, getAge, setAge metodlariga ega iUser interfeysini yarating.

iUser interfeysidan meros oladigan va unga getSalary va setSalary metodlarini qo'shadigan iEmployee interfeysini yarating.

iEmployee interfeysini amalga oshiradigan Employee klassini yarating.