laravel后台返回ajax数据

后台模式：

  $array = array('msg'=>'添加失败!','status'=>'false');
  return json_encode($array);

前台显示：

  $.ajax({
                 url: "{{url('ucenter/saveTrain')}}",
                 type: "post",
                 dataType: "json",
                 data: {"content": content,"read": read,"trainer":trainer,"time1":time1,"where":where,"result":result,"score":score,'_token': "{{csrf_token()}}"},
                 success: function (result) {

                     if(result.status == 'true'){
                         layer.msg(result.msg);
                         location.href = '{{url('ucenter/train')}}';
                     }else{
                         layer.msg(result.msg);
                         return false;
                     }
                 },