javaScript 对象不保留 php 给出的关键命​​令

Question

我有一个使用 json_encode 的数组，在 PHP 中看起来像这样

Array
    (
        [4] => Array
            (
                [numberof] => 60
                [date] => 4
            )

        [3] => Array
            (
                [numberof] => 3
                [date] => 3
            )

        [2] => Array
            (
                [numberof] => 6
                [date] => 2
            )

        [1] => Array
            (
                [numberof] => 5
                [date] => 1
            )

        [12] => Array
            (
                [numberof] => 1
                [date] => 12
            )

        [11] => Array
            (
                [numberof] => 0
                [date] => 11
            )

    )

但是，当通过javaScript访问时，顺序如下

{
      "1":{"numberof":5,"date":"1"},
      "2":{"numberof":6,"date":"2"},
      "3":{"numberof":3,"date":"3"},
      "4":{"numberof":60,"date":"4"},
      "11":{"numberof":0,"date":"11"},
      "12":{"numberof":1,"date":"12"}
 }

如何保持 PHP 中设置的顺序。

Answer 1

JavaScript 对象没有排序。

ECMA 5.1 section 4.3.3 (不保证订单)

An object is a collection of properties and has a single prototype object. The prototype may be the null value.

ECMA 3rd Edition section 4.3.3 (明确表示未订购)

An object is a member of the type Object. It is an unordered collection of properties each of which contains a primitive value, object, or function. A function stored in a property of an object is called a method.

即使使用 JavaScript “关联数组”(基本上是对象中命名属性的集合)，您也无法保证顺序。