PHP - 循环索引 JSON 数组

Question

我已经解析并循环了 JSON 多次。我似乎碰壁了一些我以前没有做过的事情，我一直无法找到答案，希望我正确地引用了这一点。我一直在为此苦苦挣扎。

通过下面的代码示例，我可以解析它并将变量分配给对象并获取其值，如下所示。

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

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

这就是问题所在，它从数组索引开始，我希望我正确地提到了这一点。基本上就是上面的[0]。我以前从未循环过类似的事情，我的研究结果是空的。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;
    }

这通常在大多数情况下都有效，但由于它具有 [0] 并随着每个新条目的增加而增加，我不确定如何循环它，因为我的入口点与我之前处理过的并且无法处理的入口点不同找到类似的工作示例。更不用说我不确定如何使用这些索引键将 ['response'] 放入循环以太中。

这是数组的解码示例以及我正在使用的内容。

Array ( [success] => 1 [error] => [response] => Array ( [0] => Array ( [id] => 59c30487db6be86b7f8b465a [loc] => Array ( [long] => -90.45 [lat] => 43.43 ) [report] => Array ( [code] => R [type] => heavy rain [name] => Gillingham [detail] => Array ( [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] => Array ( [name] => gillingham [state] => wi [county] => richland [country] => us ) [profile] => Array ( [tz] => America/Chicago ) ) [1] => Array ( [id] => 59c302a9db6be82a758b46e8 [loc] => Array ( [long] => -90.93 [lat] => 43.32 ) [report] => Array ( [code] => R [type] => heavy rain [name] => Mount Sterling [detail] => Array ( [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] => Array ( [name] => mount sterling [state] => wi [county] => crawford [country] => us ) [profile] => Array ( [tz] => America/Chicago ) ) [2] => Array ( [id] => 59c30106db6be8146c8b4661 [loc] => Array ( [long] => -89.53 [lat] => 44.45 ) [report] => Array ( [code] => R [type] => heavy rain [name] => Plover [detail] => Array ( [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] => Array ( [name] => plover [state] => wi [county] => portage [country] => us ) [profile] => Array ( [tz] => America/Chicago ) ) [3] => Array ( [id] => 59c3080adb6be8d5138b4654 [loc] => Array ( [long] => -89.33 [lat] => 44.37 ) [report] => Array ( [code] => H [type] => hail [name] => 4 mi NNW Blaine [detail] => Array ( [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] => Array ( [name] => blaine [state] => wi [county] => portage [country] => us ) [profile] => Array ( [tz] => America/Chicago ) ) [4] => Array ( [id] => 59c30106db6be8146c8b4660 [loc] => Array ( [long] => -90.93 [lat] => 43.32 ) [report] => Array ( [code] => H [type] => hail [name] => Mount Sterling [detail] => Array ( [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] => Array ( [name] => mount sterling [state] => wi [county] => crawford [country] => us ) [profile] => Array ( [tz] => America/Chicago ) ) [5] => Array ( [id] => 59c2fd80db6be844598b466d [loc] => Array ( [long] => -89.77 [lat] => 44.21 ) [report] => Array ( [code] => R [type] => heavy rain [name] => 6 mi ESE New Rome [detail] => Array ( [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] => Array ( [name] => rome [state] => wi [county] => adams [country] => us ) [profile] => Array ( [tz] => America/Chicago ) ) [6] => Array ( [id] => 59c2f678db6be898338b4673 [loc] => Array ( [long] => -89.3 [lat] => 44.46 ) [report] => Array ( [code] => H [type] => hail [name] => Amherst Junction [detail] => Array ( [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] => Array ( [name] => amherst junction [state] => wi [county] => portage [country] => us ) [profile] => Array ( [tz] => America/Chicago ) ) [7] => Array ( [id] => 59c2f2f6db6be8a2208b4672 [loc] => Array ( [long] => -89.4 [lat] => 44.26 ) [report] => Array ( [code] => H [type] => hail [name] => Almond [detail] => Array ( [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] => Array ( [name] => almond [state] => wi [county] => portage [country] => us ) [profile] => Array ( [tz] => America/Chicago ) ) ) )

我将如何使用索引键 [#] 循环遍历此内容，如果我错误地引用了此内容，请随时纠正我。

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;
}

在此处检查结果:http://sandbox.onlinephpfunctions.com/code/c7b55a67e649bdc8c35ec1ba8218747de1f8ac16