PHP工厂模式之简单使用

//示例：比如我们要写微信、支付宝的支付、退款、提现功能
//文件名：PayService.php
// 定义接口
interface Zhifu
{
    public function pay();//支付
    public function refund();//退款
    public function refer();//提现
}
 
class WeiXin implements Zhifu
{
    public function pay()
    {
        return "这是微信支付";
    }
    
    public function refund()
    {
        return "这是微信退款";
    }

    public function refer()
    {
        return "这是微信退款";
    }
}

class Alipay implements Zhifu
{
    public function pay()
    {
        return "这是支付宝支付";
    }

    public function refund()
    {
        return "这是支付宝退款";
    }

    public function refer()
    {
        return "这是支付宝退款";
    }
}

class PayService
{
    public static function create($type)
    {
        switch ($type){
            case "weixin":
                return new WeiXin();
                break;
            case "zhifubao":
                return new Alipay();
                break;
        }
    }
}

$obj = new PayService();
$obj->create('weixin');//使用支付宝就传“zhifubao”