interface errorable {
   function error($msg);
}

interface recordable {
   ssh_for_recorder();
}

class uploader__module extends base__module implements errorable,recordable {
   public function ssh_for_recorder() {
      return new ssh2;
   }
   public function error($msg) {
      $this->errors[] = $msg;
   }

   public function upload() {
      $recorder = new recorder($this);
      $recorder->run();
   }
}

class recorder {
   private $ssh2;
   private $module;
   private function upload() {
      if (!$this->ssh2) {
         $this->module->error("No SSH2 connection");
      }
   }
   public function __construct({recordable,errorable} $module) {
      $this->module = $module;
      $this->ssh2 = $module->ssh_for_recorder();
   }
}

正如您在上面的代码中所看到的,记录器类期望其模块能够同时运行error()和ssh_for_recorder(),但这些是由不同的接口定义的.不可能是不可记录的,反之亦然.

这样做有最好的做法吗？我正在考虑创建一个从可记录和错误扩展的接口,并具有upload__module实现,但我不知道该怎么称呼它.