我希望PHP中的json_encode返回JSON数组,即使索引顺序不正确 [英] I would like json_encode in PHP to return a JSON array even if the indices are not in order
问题描述
但根据此内容: http://www.php .net/manual/en/function.json-encode.php#94157 不会.
but according to this: http://www.php.net/manual/en/function.json-encode.php#94157 it won't.
我正在使用flot,所以我需要有一个返回数字索引的数组,但是我得到的是:
I'm using flot so I need to have an array with numeric indexes returned but what I'm getting is this:
jsonp1282668482872 ( {"label":"Hits 2010-08-20","data":{"1281830400":34910,"1281916800":45385,"1282003200":56928,"1282089600":53884,"1282176000":50262,"1281657600":45446,"1281744000":34998}} );
所以浮游物令人窒息.如果我在调用json_encode之前立即将数组var_dump删除,则它看起来像这样:
so flot is choking. If I var_dump the array right before I call json_encode it looks like this:
array(7) {
[1281830400]=>
int(34910)
[1281916800]=>
int(45385)
[1282003200]=>
int(56928)
[1282089600]=>
int(53884)
[1282176000]=>
int(50262)
[1281657600]=>
int(45446)
[1281744000]=>
int(34998)
}
有什么想法吗?
推荐答案
正如zneak所说,Javascript(因此是JSON)数组不能具有乱序的数组键.因此,您要么需要接受将使用JSON对象(而不是数组),要么在json_encode
之前调用array_values
:
As zneak says, Javascript (and thus JSON) arrays cannot have out-of-order array keys. Thus, you either need to accept that you'll be working with JSON objects, not arrays, or call array_values
before json_encode
:
json_encode(array_values($data));
但是,您似乎希望使用flot显示时间序列数据.正如您在 flot时间序列示例中看到的那样,它应该是这样的两个元素数组:
However, it looks like you're looking to display time series data with flot. As you can see on the flot time series example, it should be a two element array like so:
$.plot(
$('#placeholder'),
[[
[1281830400, 34910],
[1281916800, 45385],
[1282003200, 56928],
[1282089600, 53884],
[1282176000, 50262],
[1281657600, 45446],
[1281744000, 34998]
]],
{
label: 'Hits 2010-08-20',
xaxis: {mode: 'time'}
}
)
给出您的数组(我们称其为$data
),我们可以像这样获得正确的JSON:
Given your array (let's call it $data
) we can get the proper JSON like so:
json_encode(
array_map(
function($key, $value) { return array($key, $value); },
array_keys($data),
array_values($data)
)
);
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