dip_good.php

<?php


interface IMessage
{
	public function sendMessage();

}

////low Level sınıflarımız
class Email implements IMessage
{
	function sendEmail()
	{
		echo "sending Email";
	}
	public function sendMessage()
	{
		$this->sendEmail();
	}
}

class SMS implements IMessage
{
	function sendSms()
	{
		echo "sending SMS";
	}
	function sendMessage()
	{
		$this->sendSms();
	}	
}


class PushNotification implements IMessage
{
	function sendPushNotification()
	{
		echo "sending Push Notification";
	}
	function sendMessage()
	{
		$this->sendPushNotification();
	}
}


///High Level Sınıfımız

class MessageManager
{
    private $messageSender;
	function __construct($messageSender)
	{
		$this->messageSender = $messageSender;
	}	

	public function sendMessage()
	{
		$this->messageSender->sendMessage();
	}
}

///////////////

///Örnek Kullanım 
$MessageManager = new MessageManager(new Email());
$MessageManager->sendMessage();
//////
$MessageManager = new MessageManager(new SMS());
$MessageManager->sendMessage();

/////
$MessageManager = new MessageManager(new PushNotification());
$MessageManager->sendMessage();