使用 PHP 过滤 JSON 输出

Question

我一直在为这个问题挠头好几个小时，但我似乎无法让它工作。 我有一个类似这个例子的 JSON 输出：

    {
    "response": {
        "dataInfo": {
            "foundCount": 494,
            "returnedCount": 4
        },
        "data": [
            {
                "fieldData": {
                    "Closed_Date": "10/03/2021",
                    "Start_Date": "10/03/2021"
                },
                "portalData": {},
                "recordId": "152962",
                "modId": "3"
            },
            {
                "fieldData": {
                    "Closed_Date": "11/14/2021",
                    "Start_Date": "11/06/2021"
                },
                "portalData": {},
                "recordId": "153228",
                "modId": "22"
            },
            {
                "fieldData": {
                    "Closed_Date": "11/07/2021",
                    "Start_Date": "11/06/2021"
                },
                "portalData": {},
                "recordId": "153329",
                "modId": "7"
            },
            {
                "fieldData": {
                    "Closed_Date": "11/08/2021",
                    "Start_Date": "11/08/2021"
                },
                "portalData": {},
                "recordId": "153513",
                "modId": "3"
            }
        ]
    },
    "messages": [
        {
            "code": "0",
            "message": "OK"
        }
    ]
}

我想通过 Start_Date 字段使用 PHP 过滤此输出，并计算每个月创建的数量。我已经将 JSON 的结果放入一个带有 JSON 解码的数组中。

$urls = $ref->multicurlRestApi($urllinkarray, $postfield, $headers);
            
            $decode_open = json_decode($urls[0],true);

例如 this 的输出如下。

10 月：1

11 月：3

现在非常感谢任何帮助，以免我发疯

Answer 1

<?php
$jsonStr = <<<JSON
 {
    "response": {
        "dataInfo": {
            "foundCount": 494,
            "returnedCount": 4
        },
        "data": [
            {
                "fieldData": {
                    "Closed_Date": "10/03/2021",
                    "Start_Date": "10/03/2021"
                },
                "portalData": {},
                "recordId": "152962",
                "modId": "3"
            },
            {
                "fieldData": {
                    "Closed_Date": "11/14/2021",
                    "Start_Date": "11/06/2021"
                },
                "portalData": {},
                "recordId": "153228",
                "modId": "22"
            },
            {
                "fieldData": {
                    "Closed_Date": "11/07/2021",
                    "Start_Date": "11/06/2021"
                },
                "portalData": {},
                "recordId": "153329",
                "modId": "7"
            },
            {
                "fieldData": {
                    "Closed_Date": "11/08/2021",
                    "Start_Date": "11/08/2021"
                },
                "portalData": {},
                "recordId": "153513",
                "modId": "3"
            }
        ]
    },
    "messages": [
        {
            "code": "0",
            "message": "OK"
        }
    ]
}
JSON;
$response = json_decode($jsonStr, true);
if (JSON_ERROR_NONE !== json_last_error()) {
    return;
}
$counter = [];
foreach ($response['response']['data'] as $item) {
    $startDate = new DateTime($item['fieldData']['Start_Date']);
    $month = $startDate->format('m');
    if (key_exists($month, $counter)) {
        $counter[$month] += 1;
    } else {
        $counter[$month] = 1;
    }
}

var_dump($counter);die;

Answer 2

我首先将所有月份存储在一个键值数组中，其中键是月份，值是该月的条目数量。

现在，遍历所有条目 ($decode_open["response"]["data"]) 并计算月份。我只是将日期转换为 UNIX 时间戳，然后使用 PHP date 函数返回来获取月份。

然后您只需将月份添加到您的数组中（如果它不存在）并计数。

// Your code to get the data
$urls = $ref->multicurlRestApi($urllinkarray, $postfield, $headers);
$decode_open = json_decode($urls[0],true);

$months = []; // <- The array we store the final data in
$items = $decode_open["response"]["data"];
foreach($items as $item) {
    $month = date("m", strtotime($item["fieldData"]["Start_Date"]));
    if(!isset($months[$month])) $months[$month] = 0; // <- Add the month to the array if it doesn't exist
    $months[$month]++; // <- Increase the value for that month
}

print_r($months);

输出应该如下：

Array
(
    [10] => 1
    [11] => 3
)