PHP中的多维JSON数组？答案

【问题标题】：Multidimensional JSON Array In PHP?PHP中的多维JSON数组？
【发布时间】：2020-06-21 14:29:00
【问题描述】：

我对 JSON 不是很熟悉，更不用说尝试将值从其中提取到 PHP 中，所以在尝试这样做时我有点头疼。

如果这不是嵌套/多维数组，这将是一个简单的搜索、复制和粘贴作业，但我遇到的问题是我只能从数组中提取第一个结果.当然，我的代码有点乱，因为我一直在尝试新方法并对其进行破解以试图获得预期的结果，但我不确定如何以一种拉 的方式处理数据 我正在寻找的信息。

非常感谢您提供的任何提示/建议，以指导我获取所有结果，而不仅仅是第一个结果。我确定这很简单，我只是没有看到，但我已经做了一段时间了，最后决定寻求一些帮助。

这是我目前正在使用的 PHP 编码，它只提取一个结果：

$url = "https://somewhere.com/give-api/v1/donors/?key=***&token=***&number=999";
$data = file_get_contents($url);
$donors = json_decode($data, true);
$count = 0;
$output = array();

foreach ($donors as $donor) {
  $spent = substr($donor[$count]['stats']['total_spent'], 0, strpos($donor[$count]['stats']['total_spent'], "."));
  if ($spent != 0)
  {
    $level = check_spent($spent);
    //       ^ Custom function, just returns a level number based on the $spent value
    $output += [$spent, $level, $donor[$count]['info']['first_name'] . " " . $donor[$count]['info']['last_name']];
  }
  $count++;
}

echo '<pre>';
print_r($output);
echo '</pre>';

这是数据的匿名版本：

{
"donors": [
    {
        "info": {
            "user_id": "",
            "username": "",
            "display_name": "",
            "donor_id": "8",
            "title_prefix": "",
            "first_name": "John",
            "last_name": "Doe",
            "email": "john@doe.com"
        },
        "stats": {
            "total_donations": "1",
            "total_spent": "40.000000"
        },
        "address": {
            "billing": [
                {
                    "line1": "1234 Some Pl",
                    "line2": "",
                    "city": "Somewhere",
                    "state": "DC",
                    "country": "US",
                    "zip": "12345"
                }
            ]
        }
    },
    {
        "info": {
            "user_id": "",
            "username": "",
            "display_name": "",
            "donor_id": "7",
            "title_prefix": "",
            "first_name": "John",
            "last_name": "Doe",
            "email": "john@doe.com"
        },
        "stats": {
            "total_donations": "1",
            "total_spent": "50.000000"
        },
        "address": {
            "billing": [
                {
                    "line1": "1234 Some Pl",
                    "line2": "",
                    "city": "Somewhere",
                    "state": "DC",
                    "country": "US",
                    "zip": "12345"
                }
            ]
        }
    },
    {
        "info": {
            "user_id": "",
            "username": "",
            "display_name": "",
            "donor_id": "6",
            "title_prefix": "",
            "first_name": "John",
            "last_name": "Doe",
            "email": "john@doe.com"
        },
        "stats": {
            "total_donations": "1",
            "total_spent": "100.000000"
        },
        "address": {
            "billing": [
                {
                    "line1": "1234 Some Pl",
                    "line2": "",
                    "city": "Somewhere",
                    "state": "DC",
                    "country": "US",
                    "zip": "12345"
                }
            ]
        }
    },
    {
        "info": {
            "user_id": "",
            "username": "",
            "display_name": "",
            "donor_id": "5",
            "title_prefix": "",
            "first_name": "John",
            "last_name": "Doe",
            "email": "john@doe.com"
        },
        "stats": {
            "total_donations": "0",
            "total_spent": "0.000000"
        },
        "address": []
    },
    {
        "info": {
            "user_id": "",
            "username": "",
            "display_name": "",
            "donor_id": "4",
            "title_prefix": "",
            "first_name": "John",
            "last_name": "Doe",
            "email": "john@doe.com"
        },
        "stats": {
            "total_donations": "0",
            "total_spent": "0.000000"
        },
        "address": []
    },
    {
        "info": {
            "user_id": "",
            "username": "",
            "display_name": "",
            "donor_id": "3",
            "title_prefix": "",
            "first_name": "John",
            "last_name": "Doe",
            "email": "john@doe.com"
        },
        "stats": {
            "total_donations": "1",
            "total_spent": "50.000000"
        },
        "address": {
            "billing": [
                {
                    "line1": "1234 Some Pl",
                    "line2": "",
                    "city": "Somewhere",
                    "state": "DC",
                    "country": "US",
                    "zip": "12345"
                }
            ]
        }
    },
    {
        "info": {
            "user_id": "",
            "username": "",
            "display_name": "",
            "donor_id": "2",
            "title_prefix": "",
            "first_name": "John",
            "last_name": "Doe",
            "email": "john@doe.com"
        },
        "stats": {
            "total_donations": "1",
            "total_spent": "50.000000"
        },
        "address": {
            "billing": [
                {
                    "line1": "1234 Some Pl",
                    "line2": "",
                    "city": "Somewhere",
                    "state": "DC",
                    "country": "US",
                    "zip": "12345"
                }
            ]
        }
    }
],
"request_speed": 0.0026030540466308594
}

【问题讨论】：

JSON 只是数组和对象的文本表示，没有太多“熟悉”的地方。您只需使用 json_decode() 和 json_encode() 在 JSON 和它所代表的数据之间进行转换。因此，如果您了解 PHP 数组，您就了解 JSON。
尝试将$output +=更改为$output [] =
谢谢你，奈杰尔！与其他建议的编辑相结合，效果非常好！

标签： php arrays json multidimensional-array

【解决方案1】：

看看json_decode之后得到的数据，你可能会得到一个只有一个键的数组：donors。

print_r($donors);

如果是这样，请在迭代时执行此操作：

foreach ($donors['donors'] as $donor) {
  // do your work
}

【讨论】：

非常感谢！这与奈杰尔的技巧相结合，效果非常好！

【解决方案2】：

$donors 是整个地图，$donors["donors"] 是你需要迭代的地方

【讨论】：

非常感谢！这与奈杰尔的技巧相结合，效果非常好！