PHP:按键对 JSON 数据进行排序

Question

我想使用 PHP 按字母顺序对单行 JSON 数据进行排序。所以最后:

{"one":"morning","two":"afternoon","three":"evening","four":"night"}

变成:

{"four":"night","one":"morning","three":"evening","two":"afternoon"}

我尝试使用ksort但没有成功:

$icons = json_decode(file_get_contents("icons.json"));
ksort($icons);
foreach($icons as $icon => $code){...}

Answer 1

ksort 适用于数组，不适用于字符串:

$array = json_decode($json, true);
ksort($array);
echo json_encode($array);