通过他们的名字获得动态价值[关闭]

Question

我有如下代码并更改每个查询。我想通过他们的名字获得价值。

{
    "code": null,
    "msg": null,
    "success": true,
    "requestId": "72b214192f8a20e0",
    "deviceSn": "2103279315",
    "deviceId": 209268286,
    "deviceType": "INVERTER",
    "deviceState": 1,
    "collectionTime": 1696314458,
    "dataList": [{
        "key": "SN1",
        "value": "2103279315",
        "unit": null,
        "name": "SN"
    }, {
        "key": "I_T",
        "value": "String Single Inverter",
        "unit": null,
        "name": "Inverter Type"
    }, {
        "key": "DV1",
        "value": "374.90",
        "unit": "V",
        "name": "DC Voltage PV1"
    }]
}

例如；我想获得“DV1”键值（374,90）。这个怎么做？

我无法使用他们的名字访问此值。

Answer 1

使用

foreach

循环数组并检查键是否匹配

DV1

:

$jsonArray = json_decode('{"code": null, ..., "dataList": [{..}]}', true);

foreach ($jsonArray['dataList'] as $dataList) {
    if ($dataList['key'] === 'DV1') {
        echo $dataList['value'] . PHP_EOL; // 374.90
    }
}