PHP design pattern prototype design pattern principle and usage analysis php skills

This article mainly introduces the prototype design pattern of PHP design pattern, briefly describes the concept and principle of the prototype design pattern, and analyzes the definition and use of the PHP prototype design pattern in the form of examples. Friends in need can refer to it

The examples in this article describe the principles and usage of the prototype design pattern of PHP design patterns. Share it with everyone for your reference, the details are as follows:

1. What is the prototype design pattern

The prototype design pattern uses a cloning technology to copy instantiated objects. New objects are created by copying prototype instances. The purpose of the prototyping design pattern is to reduce the

overhead of instantiating objects through the use of cloning.

In the prototype design pattern, the Client class is an indispensable part.

PHP has a built-in cloning method__clone()It can be used in design mode, but it cannot be accessed directly. Just use the clone keyword. Cloning does not start the constructor.

2. When to use the prototype design pattern

If a project requires you to create multiple instances of a prototype object, you can use the prototype design pattern.

3. Examples of prototyping design pattern

Here is a modern enterprise organization as an example:

<?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() . &#39;<br />&#39;;
    echo $employee->getDept() . &#39;<br />&#39;;
    echo $employee->getId() . &#39;<br />&#39;;
  }
}
$client = new Client();
?>

Run results:

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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