# 程序解決辦法 1。這樣更換，修改配置文件，或調整工廠類，就可以了 ``` class AliSms { public function send($phone, $content) { print_r("阿里短信發送給{$phone}, $content"); } } class BaiduSms { public function send($phone, $content) { print_r("百度短信發送給{$phone}, $content"); } } class Factory { public static function getSms() { //從配置文件中，獲取緩存類型 $type = config('cache.default'); switch($type) { case 'ali': $sms = new AliSms(); break; case 'baiidu': $sms = new BaiduSms(); break; } return $sms; } } $sms = Factory::getSms(); $sms->send('13912345678', 'php是世界上最好的語言'); ```