建立受保護的 API

公共使用者無法訪問此 API，因此需要進行身份驗證

/***************************
this is protected api this is not accessible if you are not loged in
***************************/
public function protectedapi(){
  if($this->session->userdata('logged_in')){
    //this section only accessible when user loged in
    $this->output->set_output(json_encode(array('status'=>true,'msg'=>'Access allowed')));
  }else{
    $this->output->set_output(json_encode(array('status'=>true,'msg'=>'Access denied')));
  }
}

https://i.stack.imgur.com/e42MM.jpg