从JSON输入检索数组键 [英] Retrieving array keys from JSON input

问题描述

我有这样的数组：

$json = json_decode('
{"entries":[
{"id": "29","name":"John", "age":"36"},
{"id": "30","name":"Jack", "age":"23"}
]}
');

和我正在寻找一个PHP为每一个循环，将检索在项键名，即：

and I am looking for a PHP "for each" loop that would retrieve the key names under entries, i.e.:

id
name
age

我怎样才能做到这一点？

How can I do this?

推荐答案

试用

foreach($json->entries as $row)
{
    foreach($row as $key => $val)
    {
        echo $key . ': ' . $val;
        echo '<br>';
    }
}

在$关键你要拿到钥匙的名称和在Val你SHAL获取值

In the $key you shall get the key names and in the val you shal get the values

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