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A factory method example in PHP.

目录结构
	Creator  -- 工厂
		Creator.php  --  工厂抽象类
		FruitCeator.php -- 水果工厂
	Product----产品
		Product.php -- 产品抽象类
		AppleProduct.php -- 苹果产品
		BananaProduct.php -- 香蕉产品
	Helper-————帮助类
	Client.php-客户

调用：
$Client = new Client();

echo "\n";
echo "Jack: Hi give me an Apple!\n";
echo "\n";
echo "Product: " . $Client->getApple() . "\n";

结果:

Jack: Hi give me an Apple!

Product: I am apple!


调用：
$Client = new Client();

echo "\n";
echo "Jack: Hi give me an Banana!\n";
echo "\n";
echo "Product: " . $Client->getApple() . "\n";
echo "\n";

结果：

Jack: Hi give me an Banana!

Product: I am apple!