设计模式(原型模式)

浅拷贝：拷贝一个对象作为另外一个对象的副本，之拷贝属性和方法。如果属性是对象拷贝的是对象的引用。

深度拷贝：拷贝一个对象作为另外对象的一个副本，包括该对象下的属性及方法，如果属性是对象也要拷贝而不是拷贝引用。

 

深度拷贝

 

<?php

class Company {
    protected $name;
    protected $address;

    function __construct($name, $address){
        $this->name = $name;
        $this->address = $address;
    }

    function getAddress(){
        return $this->address;
    }
    function setName($name) {
        $this->name = $name;
    }
    function getName(){
        return $this->name;
    }

}

class Person {
    protected $name;
    protected $age;
    public $company;

    function __construct($name,$age){
        $this->name = $name;
        $this->age = $age;
        $this->company = new Company('北京','北京市海淀区');
    }

    function changeCompanyName($name){
        $this->company->setName($name);
    }
    function getName(){
        return $this->name;
    }

    function getAge(){
        return $this->age;
    }
    function getCompanyName(){
        return $this->company->getName();
    }

    function getCompanyAddress(){
        return $this->company->getAddress();
    }
    function __clone(){
       $this->company =  clone $this->company;
    }
    function getCompany(){
        return $this->company;
    }
}

$p1 = new Person('jam.zhou', '88');

$p2 = clone $p1;
$p1->changeCompanyName('深圳**公司');

echo $p1->getCompanyName();  echo "\n";
echo $p2->getCompanyName();

浅拷贝

<?php

class Company {
	protected $name;
	protected $address;

	function __construct($name, $address){
		$this->name = $name;
		$this->address = $address;
	}

	function getAddress(){
		return $this->address;
	}
    function setName($name) {
		$this->name = $name;
	}
	function getName(){
		return $this->name;
	}

}

class Person {
	protected $name;
	protected $age;
	public $company;

	function __construct($name,$age){
		$this->name = $name;
		$this->age = $age;
		$this->company = new Company('北京','北京市海淀区');
	}

    function changeCompanyName($name){
		$this->company->setName($name);
	}
	function getName(){
		return $this->name;
	}

	function getAge(){
		return $this->age;
	}
	function getCompanyName(){
		return $this->company->getName();
	}

	function getCompanyAddress(){
		return $this->company->getAddress();
	}
	
	function getCompany(){
		return $this->company;
	}
}

$p1 = new Person('jam.zhou', '88');

$p2 = clone $p1;
$p1->changeCompanyName('深圳**公司');

echo $p1->getCompanyName();  echo "\n";
echo $p2->getCompanyName();

　　深圳拷贝如果引用的对象太多，可以不考虑使用__clone方法实现，而应该拷贝用序列号来实现。

<?php

class Company {
    protected $name;
    protected $address;

    function __construct($name, $address){
        $this->name = $name;
        $this->address = $address;
    }

    function getAddress(){
        return $this->address;
    }
    function setName($name) {
        $this->name = $name;
    }
    function getName(){
        return $this->name;
    }

}

class Person {
    protected $name;
    protected $age;
    public $company;

    function __construct($name,$age){
        $this->name = $name;
        $this->age = $age;
        $this->company = new Company('北京','北京市海淀区');
    }

    function changeCompanyName($name){
        $this->company->setName($name);
    }
    function getName(){
        return $this->name;
    }

    function getAge(){
        return $this->age;
    }
    function getCompanyName(){
        return $this->company->getName();
    }

    function getCompanyAddress(){
        return $this->company->getAddress();
    }
    
    function getCompany(){
        return $this->company;
    }
}

$p1 = new Person('jam.zhou', '88');

$p2 =  unserialize(serialize($p1));