<?php
/**
 * 简单工厂模式——经典运算符例子
 * @author 燕睿涛（luluyrt@163.com）
 */
/*简单工********************厂********************类*/
class Operation{
    /**
     * @var int $numa
     * 要操作的两个数字
     */
    protected $numa;
    protected $numb;
    public function __construct($a,$b){
        $this->numa = $a;
        $this->numb = $b;
    }

    //静态方法，通过接受不同的参数生成不同的对象实例
    public static function create($operation,$a,$b){
        switch ($operation) {
            case ‘+‘:
                return new Operationadd($a,$b);
                break;
            
            case ‘-‘:
                return new Operationminus($a,$b);
                break;
            default:
                # code...
                break;
        }
    }

}
/************************************************/

/*加法*/
class Operationadd extends Operation{
    public function doing(){
        return $this->numa + $this->numb;
    }
}

/*减法*/
class Operationminus extends Operation{
    public function doing(){
        return $this->numa - $this->numb;
    }
}

$test = Operation::create(‘+‘,2,56);
echo $test->doing();

<?php
/**
 * 简单工厂模式——经典运算符例子
 * @author 燕睿涛（luluyrt@163.com）
 */
/*工*********厂**********方**********法*/
//交通工具接口(抽象产品角色)
interface vehicle{
    public function runing();
}
//交通工具工厂接口（抽象工厂角色）
interface vehiclefactory{
    public static function get();
}
/*具体产品角色*/
class car implements vehicle{
    public function runing(){
        echo "My speed is 120KM/h \r";
    }
}

class bicycle implements vehicle{
    public function runing(){
        echo "My speed is 30KM/h \r";
    }
}
/*具体工厂角色*/
class carfactory implements vehiclefactory{
    public static function get(){
        return new car();
    }
}
class bicyclefactory implements vehiclefactory{
    public static function get(){
        return new bicycle();
    }
}

$test = bicyclefactory::get();
$test->runing();