Hello World OOP

oophello.php

<?php

/*
 * contoh interface
 */
interface Printer 
{ 
	public function printOut($message); 
} 

/*
 * class Message 
 * berisi pesan string yang ingin ditampilkan
 */
class Message 
{ 
	private $message; 

	public function __construct($message) { 
		$this->message = $message; 
	} 

	public function printOut($printer) { 
		$printer->printOut($this->toString()); 
	} 

	public function toString() { 
		return $this->message; 
	} 
} 

/*
 * contoh class abstract
 * harus dibuat object inheritance kalau mau pake
 */
abstract class AbstractPrinterFactory 
{ 
	public static function getFactory(){ 
		return new SystemOutPrinterFactory(); 
	} 

	public abstract function getPrinter(); 
} 

/*
 * contoh inheritance dari class abstract
 */
class SystemOutPrinterFactory extends AbstractPrinterFactory 
{ 
	public function getPrinter() { 
		return new SystemOutPrinter(); 
	} 
} 

/*
 * contoh implementasi interface
 */
class SystemOutPrinter implements Printer 
{ 
	public function printOut($message) { 
		print $message; 
	} 
} 

/*
 * program utama :)
 */
class HelloWorld 
{ 
	public static function run($arg) 
	{ 
		$message = new Message($arg); 
		$factory = AbstractPrinterFactory::getFactory(); 
		$printer = $factory->getPrinter(); 
		$message->printOut($printer); 
	} 
}


/*
 * Sekarang jalankan aplikasi
 */
HelloWorld::run("Hello, World!");

the most amazing "hello world" syntax :o