JSON编码与[]

Question

我似乎不能让我的json_encode包括括号。有什么帮助吗？

我的代码是：

$th = json_encode(array("4" => "four", "8" => "eight"));
echo $th;

，输出为：

{"4":"four","8":"eight","9":"\n"}

我需要发送到api的输出是：

[{"4":"four","8":"eight","9":"\n"}]

如何获得JSON数组中的括号？谢谢!

Answer 1

使用这个

$th = json_encode(array(array("4" => "four", "8" => "eight", "9" => "\n")));

Answer 2

你应该这样做：

$th = json_encode(array(array("4" => "four", "8" => "eight")));