php輸出json,需要嵌套數組和對象問題

https://segmentfault.com/q/1010000009985295

 

        $tmp = [];
            $tmp['id'] = 'aaa'; $tmp['name'] = 'bbb'; $tmp['vvvv'] = [ 'www'=>1, 'ffff'=>2 ]; echo (json_encode($tmp));

輸出是

{
"id": "aaa", "name": "bbb", "vvvv": { "www": 1, "ffff": 2 } }

我想問一下如何將輸出改為

{
"id": "aaa", "name": "bbb", "vvvv": [ {"www": 1}, {"ffff": 2} ] }

我測試過這樣是可以的,就是不太好用:

 

    $tmp['vvvv'] = [ 0=>(object)['www'=>1], 1=>(object)['fff'=>2] ];

將$tmp['vvvv']里的元素換成數組就行了，不需要轉化為object，如下

 

            $tmp = [];
            $tmp['id'] = 'aaa'; $tmp['name'] = 'bbb'; $tmp['vvvv'] = [ ['www'=>1], ['ffff'=>2] ];