jQuery，javascript解析Json并保持相同的索引顺序

Question

我有一个由php生成的数组：

(
    [1] => Array
        (
            [url] => files/logo.png
            [time] => 23 Mar 2016
            [size] => 1.45KB
        )

    [2] => Array
        (
            [url] => files/print.png
            [ftime] => 23 Mar 2016
            [size] => 3.75B
        )

    [0] => Array
        (
            [url] => files/empty.jpg
            [ftime] => 03 Apr 2015
            [size] => 10.80KB
        )

)

但是当我用json_encode运行它并通过ajax检索它时：

    $.get(files.php", {
        findFiles: "1",
    }).done(function(json) {
        var obj = $.parseJSON(json);
        console.log(obj)
    }, "json");

我最终得到了：

{
   "files":[
      {
         "url":"files\/empty.jpg",
         "ftime":"03 Apr 2015",
         "size":"10.80KB",
      },
      {
         "url":"files\/logo.png",
         "ftime":"23 Mar 2016",
         "size":"1.45KB",
      },
      {
         "url":"files\/print.png",
         "ftime":"23 Mar 2016",
         "size":"3.75B",
      }
   ]
}

它总是重置从0索引开始的数组。有没有办法阻止$ .parseJSON重置数组，并保持相同的顺序？