php 设计模式 工厂模式 基于php设计模式中工厂模式仔细讲解

<?php
//对象
class MyObject{
    public function __construct(){}
    public function test(){
        return 'test';
    }
}
//工厂
class MyFactory{
    public static function factory(){
        return new MyObject();
    }
}

$myObject = MyFactory::factory();
echo $myObject->test();
?>
 

?<?php
//抽象类 定义属性及抽象方法
abstract class Operation{
    protected $_NumberA = 0;
    protected $_NumberB = 0;
    protected $_Result= 0;

    public function __construct($A,$B){
        $this->_NumberA = $A;
        $this->_NumberB = $B;
    }

    public function setNumber($A,$B){
        $this->_NumberA = $A;
        $this->_NumberB = $B;
    }

    public function clearResult(){
        $this->_Result = 0;
    }

    abstract protected function getResult();
}

//操作类
class OperationAdd extends Operation{
    public function getResult(){
        $this->_Result = $this->_NumbserA + $this->_NumberB;
        return $this->_Result;
    }
}

class OperationSub extends Operation{
    public function getResult(){
        $this->_Result = $this->_NumberA - $this->_NumberB;
        return $this->_Result;
    }
}
…………

//工厂类
class OperationFactory{
    private static $obj;

    public static function CreationOperation($type,$A,$B){
        switch($type){
            case '+':
                self::$obj = new OperationAdd($A,$B);
                break;
            case '-':
                self::$obj = new OperationSub($A,$B);
                break;
            ……
        }
    }
}

//操作
$obj = OperationFactory:: CreationOperation('+',5,6);
echo $obj-> getResult();
?>