Question

我已经多次解析并循环使用JSON。我似乎碰到了一些我之前没有做过的事情，我一直无法找到答案，希望我能正确地引用它。我一直在努力解决这个问题。

通过下面的代码示例，我可以解析它并为对象分配一个变量并获得它的值。

$result = json_decode($json, true);
print_r($result);

echo $result['response'][0]['report']['type'];

这是问题的来源，它从数组索引开始，我希望我正确引用它。基本上它是上面的[0]。我以前从来没有经历过类似的事情，我的研究空洞。通常我会这样做。

$json = '{"success":true,"error":null,"response":[{"id":"59c30487db6be86b7f8b465a","loc":{"long":-90.45,"lat":43.43},"report":{"code":"R","type":"heavy rain","name":"Gillingham","detail":{"text":1,"rainIN":1,"rainMM":25.4},"reporter":"co-op observer","comments":"","timestamp":1505952240,"cat":"rain","dateTimeISO":"2017-09-20T19:04:00-05:00","datetime":"2017-09-20T19:04:00-05:00","wfo":"arx"},"place":{"name":"gillingham","state":"wi","county":"richland","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c302a9db6be82a758b46e8","loc":{"long":-90.93,"lat":43.32},"report":{"code":"R","type":"heavy rain","name":"Mount Sterling","detail":{"text":2.25,"rainIN":2.25,"rainMM":57.15},"reporter":"trained spotter","comments":"","timestamp":1505951760,"cat":"rain","dateTimeISO":"2017-09-20T18:56:00-05:00","datetime":"2017-09-20T18:56:00-05:00","wfo":"arx"},"place":{"name":"mount sterling","state":"wi","county":"crawford","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c30106db6be8146c8b4661","loc":{"long":-89.53,"lat":44.45},"report":{"code":"R","type":"heavy rain","name":"Plover","detail":{"text":1.05,"rainIN":1.05,"rainMM":26.67},"reporter":"co-op observer","comments":"One hour total rainfall. also measured a 49 mph wind gust at 511 pm. no hail.","timestamp":1505950800,"cat":"rain","dateTimeISO":"2017-09-20T18:40:00-05:00","datetime":"2017-09-20T18:40:00-05:00","wfo":"grb"},"place":{"name":"plover","state":"wi","county":"portage","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c3080adb6be8d5138b4654","loc":{"long":-89.33,"lat":44.37},"report":{"code":"H","type":"hail","name":"4 mi NNW Blaine","detail":{"text":0.88,"hailIN":0.88,"hailMM":22.35},"reporter":"trained spotter","comments":"Nickel size hail and heavy rain. 3.25 to 3.49 inches in the past 2 hours.","timestamp":1505950680,"cat":"hail","dateTimeISO":"2017-09-20T18:38:00-05:00","datetime":"2017-09-20T18:38:00-05:00","wfo":"grb"},"place":{"name":"blaine","state":"wi","county":"portage","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c30106db6be8146c8b4660","loc":{"long":-90.93,"lat":43.32},"report":{"code":"H","type":"hail","name":"Mount Sterling","detail":{"text":0.75,"hailIN":0.75,"hailMM":19.05},"reporter":"trained spotter","comments":"Hail ranged from 1\/2 to 3\/4 inch.","timestamp":1505950200,"cat":"hail","dateTimeISO":"2017-09-20T18:30:00-05:00","datetime":"2017-09-20T18:30:00-05:00","wfo":"arx"},"place":{"name":"mount sterling","state":"wi","county":"crawford","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c2fd80db6be844598b466d","loc":{"long":-89.77,"lat":44.21},"report":{"code":"R","type":"heavy rain","name":"6 mi ESE New Rome","detail":{"text":4,"rainIN":4,"rainMM":101.6},"reporter":"trained spotter","comments":"","timestamp":1505949840,"cat":"rain","dateTimeISO":"2017-09-20T18:24:00-05:00","datetime":"2017-09-20T18:24:00-05:00","wfo":"arx"},"place":{"name":"rome","state":"wi","county":"adams","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c2f678db6be898338b4673","loc":{"long":-89.3,"lat":44.46},"report":{"code":"H","type":"hail","name":"Amherst Junction","detail":{"text":1,"hailIN":1,"hailMM":25.4},"reporter":"trained spotter","comments":"","timestamp":1505948340,"cat":"hail","dateTimeISO":"2017-09-20T17:59:00-05:00","datetime":"2017-09-20T17:59:00-05:00","wfo":"grb"},"place":{"name":"amherst junction","state":"wi","county":"portage","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c2f2f6db6be8a2208b4672","loc":{"long":-89.4,"lat":44.26},"report":{"code":"H","type":"hail","name":"Almond","detail":{"text":2,"hailIN":2,"hailMM":50.8},"reporter":"trained spotter","comments":"Report via social media","timestamp":1505948160,"cat":"hail","dateTimeISO":"2017-09-20T17:56:00-05:00","datetime":"2017-09-20T17:56:00-05:00","wfo":"grb"},"place":{"name":"almond","state":"wi","county":"portage","country":"us"},"profile":{"tz":"America\/Chicago"}}]}';
    $result = json_decode($json, true);
    print_r($result);    

    foreach($result as report) {

        $type = $report['report']['type'];

     echo $type;
    }

这通常适用于大多数情况，但因为它有[0]并随着每个新条目而增加，我不知道如何循环，因为我的入口点不同于我以前处理过的并且已经无法处理找到这样的事情的任何工作例子。更不用说我不知道如何使用那些索引键将['response']用于循环以太。

这是一个数组的解码示例以及我正在使用的内容。

我如何使用索引键[＃]循环播放此内容，如果我提到这个错误，请随意纠正我。

Answer 1

您可以在$result["response"]中使用循环：

$json = '{"success":true,"error":null,"response":[{"id":"59c30487db6be86b7f8b465a","loc":{"long":-90.45,"lat":43.43},"report":{"code":"R","type":"heavy rain","name":"Gillingham","detail":{"text":1,"rainIN":1,"rainMM":25.4},"reporter":"co-op observer","comments":"","timestamp":1505952240,"cat":"rain","dateTimeISO":"2017-09-20T19:04:00-05:00","datetime":"2017-09-20T19:04:00-05:00","wfo":"arx"},"place":{"name":"gillingham","state":"wi","county":"richland","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c302a9db6be82a758b46e8","loc":{"long":-90.93,"lat":43.32},"report":{"code":"R","type":"heavy rain","name":"Mount Sterling","detail":{"text":2.25,"rainIN":2.25,"rainMM":57.15},"reporter":"trained spotter","comments":"","timestamp":1505951760,"cat":"rain","dateTimeISO":"2017-09-20T18:56:00-05:00","datetime":"2017-09-20T18:56:00-05:00","wfo":"arx"},"place":{"name":"mount sterling","state":"wi","county":"crawford","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c30106db6be8146c8b4661","loc":{"long":-89.53,"lat":44.45},"report":{"code":"R","type":"heavy rain","name":"Plover","detail":{"text":1.05,"rainIN":1.05,"rainMM":26.67},"reporter":"co-op observer","comments":"One hour total rainfall. also measured a 49 mph wind gust at 511 pm. no hail.","timestamp":1505950800,"cat":"rain","dateTimeISO":"2017-09-20T18:40:00-05:00","datetime":"2017-09-20T18:40:00-05:00","wfo":"grb"},"place":{"name":"plover","state":"wi","county":"portage","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c3080adb6be8d5138b4654","loc":{"long":-89.33,"lat":44.37},"report":{"code":"H","type":"hail","name":"4 mi NNW Blaine","detail":{"text":0.88,"hailIN":0.88,"hailMM":22.35},"reporter":"trained spotter","comments":"Nickel size hail and heavy rain. 3.25 to 3.49 inches in the past 2 hours.","timestamp":1505950680,"cat":"hail","dateTimeISO":"2017-09-20T18:38:00-05:00","datetime":"2017-09-20T18:38:00-05:00","wfo":"grb"},"place":{"name":"blaine","state":"wi","county":"portage","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c30106db6be8146c8b4660","loc":{"long":-90.93,"lat":43.32},"report":{"code":"H","type":"hail","name":"Mount Sterling","detail":{"text":0.75,"hailIN":0.75,"hailMM":19.05},"reporter":"trained spotter","comments":"Hail ranged from 1\/2 to 3\/4 inch.","timestamp":1505950200,"cat":"hail","dateTimeISO":"2017-09-20T18:30:00-05:00","datetime":"2017-09-20T18:30:00-05:00","wfo":"arx"},"place":{"name":"mount sterling","state":"wi","county":"crawford","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c2fd80db6be844598b466d","loc":{"long":-89.77,"lat":44.21},"report":{"code":"R","type":"heavy rain","name":"6 mi ESE New Rome","detail":{"text":4,"rainIN":4,"rainMM":101.6},"reporter":"trained spotter","comments":"","timestamp":1505949840,"cat":"rain","dateTimeISO":"2017-09-20T18:24:00-05:00","datetime":"2017-09-20T18:24:00-05:00","wfo":"arx"},"place":{"name":"rome","state":"wi","county":"adams","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c2f678db6be898338b4673","loc":{"long":-89.3,"lat":44.46},"report":{"code":"H","type":"hail","name":"Amherst Junction","detail":{"text":1,"hailIN":1,"hailMM":25.4},"reporter":"trained spotter","comments":"","timestamp":1505948340,"cat":"hail","dateTimeISO":"2017-09-20T17:59:00-05:00","datetime":"2017-09-20T17:59:00-05:00","wfo":"grb"},"place":{"name":"amherst junction","state":"wi","county":"portage","country":"us"},"profile":{"tz":"America\/Chicago"}},{"id":"59c2f2f6db6be8a2208b4672","loc":{"long":-89.4,"lat":44.26},"report":{"code":"H","type":"hail","name":"Almond","detail":{"text":2,"hailIN":2,"hailMM":50.8},"reporter":"trained spotter","comments":"Report via social media","timestamp":1505948160,"cat":"hail","dateTimeISO":"2017-09-20T17:56:00-05:00","datetime":"2017-09-20T17:56:00-05:00","wfo":"grb"},"place":{"name":"almond","state":"wi","county":"portage","country":"us"},"profile":{"tz":"America\/Chicago"}}]}';
$result = json_decode($json, true);

foreach($result["response"] as $report) {
    $type = $report['report']['type'];
    echo $type;
}

在此处查看结果：http://sandbox.onlinephpfunctions.com/code/c7b55a67e649bdc8c35ec1ba8218747de1f8ac16

PHP - 通过索引的JSON数组循环

1 个答案: