<?php /** * 原型模式 * * 用原型实例指定创建对象的种类.并且通过拷贝这个原型来创建新的对象 * */ abstract class Prototype { private $_id = null; public function __construct($id) { $this->_id = $id; } public function getID() { return $this->_id; } public function __clone() // magic function { $this->_id += 1; } public function getClone() { return clone $this; } } class ConcretePrototype extends Prototype { } // $objPrototype = new ConcretePrototype(0); $objPrototype1 = clone $objPrototype; echo $objPrototype1->getID()."<br/>"; $objPrototype2 = $objPrototype; echo $objPrototype2->getID()."<br/>"; $objPrototype3 = $objPrototype->getClone(); echo $objPrototype3->getID()."<br/>";