工厂模式是另一种非常常用的模式，正如其名字所示：确实是对象实例的生产工厂。某些意义上，工厂模式提供了通用的方法有助于我们去获取对象，而不需要关心其具体的内在的实现
<?php
interface Factory {
public function getProduct();
}
interface Product {
public function getName();
}
class FirstFactory implements Factory {
public function getProduct() {
return new FirstProduct();
}
}
class SecondFactory implements Factory {
public function getProduct() {
return new SecondProduct();
}
}
class FirstProduct implements Product {
public function getName() {
return ‘The first product‘;
}
}
class SecondProduct implements Product {
public function getName() {
return ‘Second product‘;
}
}
$factory = new FirstFactory();
$firstProduct = $factory->getProduct();
$factory = new SecondFactory();
$secondProduct = $factory->getProduct();
print_r($firstProduct->getName());
// The first product
print_r($secondProduct->getName());
// Second product
原文：http://www.cnblogs.com/Czc963239044/p/7115748.html