没有方括号json数组 [英] no square bracket json array

问题描述

尝试访问API时，必须像这样解析JSON数组

When trying to access an API the JSON array must be parsed like this

{"item":[{"id":"123456", "name":"adam"}]}

但是当我执行以下代码时

But when i'm doing the following code

$data = array("item" => array("id" => "123456", "name" => "adam"));
echo json_encode($data);

它返回不带方括号的json数组，如下所示:

it returns the json array without squared brackets as follows

{"item":{"id":"123456","name":"adam"}}

我花了数小时试图找出解决方法，却想不出解决办法

I've spent hours trying to figure out how to fix this and just can't think of a solution

推荐答案

您需要将内容包装在另一个array中:

You need to wrap things in another array:

$data = array("item" => array(array("id" => "123456", "name" => "adam")));

如果我们使用等效的PHP 5.4数组语法，这将更容易理解:

This will be more understandable if we use the equivalent PHP 5.4 array syntax:

$data = [ "item" => [ ["id" => "123456", "name" => "adam"] ] ];

将此与JSON进行比较:

Compare this with the JSON:

        { "item":   [ {"id":"123456", "name":"adam"      } ] }

唯一要说明的是为什么一个PHP数组在JSON中仍然是数组[]，而另两个数组被转换为对象{}.但是文档已经这样做了:

The only thing to explain is why one of the PHP arrays remains an array [] in JSON while the other two get converted to an object {}. But the documentation already does so:

对数组进行编码时，如果键不是连续数字 从0开始的序列，所有键都编码为字符串，并且 为每个键值对明确指定.

When encoding an array, if the keys are not a continuous numeric sequence starting from 0, all keys are encoded as strings, and specified explicitly for each key-value pair.

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