本文实例讲述了PHP设计模式之原型设计模式原理与用法。分享给大家供大家参考，具体如下：

一、什么是原型设计模式

原型设计模式使用一种克隆技术来复制实例化的对象，新对象是通过复制原型实例创建的。原型设计模式的目的是通过使用克隆以减少

实例化对象的开销。

在原型设计模式中，Client类是不可缺少的一部分。

PHP有一个内置的克隆方法__clone()可以在设计模式中使用，但是不能直接访问，使用clone关键字即可。克隆不会启动构造函数。

二、什么时候使用原型设计模式

如果一个项目要求你创建某个原型对象的多个实例，就可以使用原型设计模式。

三、原型设计模式实例

这里以现代企业组织为例：

<?php/*** 原型设计模式* 以现代企业组织为例**///部门抽象类abstract class IAcmePrototype{ protected $id; //员工ID号 protected $name; //员工名字 protected $dept; //员工部门 //克隆方法 abstract function __clone(); //员工部门设置方法 abstract function setDept($orgCode); //员工部门获取方法 public function getDept() { return $this->dept; } //员工ID号设置方法 public function setId($id) { $this->id = $id; } //员工ID号获取方法 public function getId() { return $this->id; } //员工名字设置方法 public function setName($name) { $this->name = $name; } //员工名字获取方法 public function getName() { return $this->name; }}//市场部类class Marketing extends IAcmePrototype{ const UNIT = "Marketing"; //标识 //市场部门类别 private $sales = "sales"; private $promotion = "promotion"; private $strategic = "strategic planning"; //克隆函数 function __clone() { } //部门设置函数 public function setDept($orgCode) { switch($orgCode) { case 101: $this->dept = $this->sales; break; case 102: $this->dept = $this->promotion; break; case 103: $this->dept = $this->strategic; break; default: $this->dept = "Unrecognized Marketing"; } }}//管理部类class Management extends IAcmePrototype{ const UNIT = "Management"; private $research = "research"; private $plan = "planning"; private $operations = "operations"; function __clone() { } public function setDept($orgCode) { switch($orgCode) { case 201: $this->dept = $this->research; break; case 202: $this->dept = $this->plan; break; case 203: $this->dept = $this->operations; break; default: $this->dept = "Unrecognized Marketing"; } }}//工厂部类class Engineering extends IAcmePrototype{ const UNIT = "Engineering"; private $development = "programming"; private $design = "digital artwork"; private $sysAd = "system administration"; function __clone() { } public function setDept($orgCode) { switch($orgCode) { case 301: $this->dept = $this->development; break; case 302: $this->dept = $this->design; break; case 303: $this->dept = $this->sysAd; break; default: $this->dept = "Unrecognized Marketing"; } }}//客户类class Client{ private $market; //市场部类实例 private $manage; //管理部类实例 private $engineer; //工厂部类实例 //构造函数 public function __construct() { $this->makeConProto(); //市场部类实例克隆 $Tess = clone $this->market; $this->setEmployee($Tess,"Tess Smith",101,"ts101-1234"); $this->showEmployee($Tess); $Jacob = clone $this->market; $this->setEmployee($Jacob,"Jacob Jones",102,"jj101-2234"); $this->showEmployee($Jacob); //管理部类实例克隆 $Ricky = clone $this->manage; $this->setEmployee($Ricky,"Ricky Rodrigues",203,"rr203-5634"); $this->showEmployee($Ricky); //工程部类实例克隆 $Olivia = clone $this->engineer; $this->setEmployee($Olivia,"Olivia perez",302,"op302-1278"); $this->showEmployee($Olivia); $John = clone $this->engineer; $this->setEmployee($John,"John Jackson",301,"jj301-1454"); $this->showEmployee($John); } //实例化部门对象 private function makeConProto() { $this->market = new Marketing(); $this->manage = new Management(); $this->engineer = new Engineering(); } //员工信息设置方法 private function setEmployee(IAcmePrototype $employee,$name,$dept,$id) { $employee->setName($name); $employee->setDept($dept); $employee->setId($id); } //员工信息显示方法 private function showEmployee(IAcmePrototype $employee) { echo $employee->getName() . '<br />'; echo $employee->getDept() . '<br />'; echo $employee->getId() . '<br />'; }}$client = new Client();?>

运行结果：

Tess Smith
sales
ts101-1234
Jacob Jones
promotion
jj101-2234
Ricky Rodrigues
operations
rr203-5634
Olivia perez
digital artwork
op302-1278
John Jackson
programming
jj301-1454

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希望本文所述对大家PHP程序设计有所帮助。