php设计模式---简单工厂模式

class operation{
    public $numbA = 0;
    public $numbB = 0;
    public function result(){

    }
}

class add extends operation{
    public function result(){
        return $this->numbA + $this->numbB;
    }
}
class sub extends operation{
    public function result(){
        return $this->numbA - $this->numbB;
    }
}

class operationFactory{
//工厂
    public static function createOperation($operator){
        switch ($operator){
            case '+':
                $oper = new add();
                break;
            case '-':
                $oper = new sub();
                break;
        }
        return $oper;
    }
}

//客户端调用

$op = operationFactory::createOperation('+');
$op->numbA = 10;
$op->numbB = 5;
var_dump($op->result());

本人经过测试,博客每天不定时更新,每天都有好东西...