<?php

abstract class Shape
{
	abstract function Draw();
}

class Square extends Shape
{
	function Draw()
	{
		echo "Square";
	}
}

class Circle extends Shape
{
	function Draw()
	{
		echo "Circle";
	}
}

$square = new Square();
$square->Draw();
echo "\n";
$circle = new Circle();
$circle->Draw();
echo "\n";

abstract class ShapeFactory
{
	abstract function Create();
}

class SquareFactory extends ShapeFactory
{
	function Create()
	{
		return new Square();
	}
}

class CircleFactory extends ShapeFactory
{
	function Create()
	{
		return new Circle();
	}
}

$squareFactory = new SquareFactory();
$circleFactory = new CircleFactory();

$a_square = $squareFactory->Create();
$a_circle = $circleFactory->Create();

$a_square->Draw();
echo "\n";
$a_circle->Draw();
echo "\n";
?>