按降序排列json属性

我有下面的json，如何按DESC顺序对“c”值排序

[{"id":"2","val":"2pm.com","c":"4"}, 
{"id":"2","val":"Adidas","c":"2"},
{"id":"2","val":"AJ Morgan","c":"2"},
{"id":"2","val":"Alfio Raldo","c":"3"},
{"id":"1","val":"ASOS","c":"112"},
{"id":"2","val":"ASOS","c":"34"},
{"id":"2","val":"ASOS Curve","c":"39"},
{"id":"2","val":"Baby Be Dazzled","c":"13"}]

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我使用PHP和ajax

你可以在JS中做一些事情，比如

arr.sort(compare);

function compare(obj1, obj2) {
    return obj1.c - obj2.c;
}

console.log(arr);

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您应该在php中排序

array

，然后

json\u编码

排序数组并发送ajax响应？