如何在PHP中从JSON回显特定的密钥=>值对
如何在PHP中从JSON回显特定的密钥=>值对
提问于 2018-07-24 03:41:18
我正在访问本地网络中的API。我需要使用一些值来做其他事情，但是我不知道如何从这个JSON数组中获取特定的key=>value对。
要获得JSON，我需要：
$url = 'http://192.168.123.123/api/dev';
$result = file_get_contents($url);
$resultData = json_decode($result);
//echo "<pre>";
print_r($resultData);
echo "<br>";这给了我：
stdClass Object ( [data] => stdClass Object ( [1E5410ECC9D90FC3] => stdClass Object ( [type] => BB-TH [state] => normal [alarm] => stdClass Object ( [state] => none [severity] => ) [name] => Watchdog 15 [label] => Watchdog 15 [entity] => stdClass Object ( [0] => stdClass Object ( [name] => Watchdog 15 [alarm] => stdClass Object ( [state] => none [severity] => ) [measurement] => stdClass Object ( [0] => stdClass Object ( [type] => temperature [value] => 62.61 [state] => normal [alarm] => stdClass Object ( [state] => clear [severity] => ) [units] => F [datalogEnabled] => 1 ) [1] => stdClass Object ( [type] => humidity [value] => 47 [state] => normal [alarm] => stdClass Object ( [state] => none [severity] => ) [datalogEnabled] => 1 ) [2] => stdClass Object ( [type] => dewpoint [value] => 42.13 [state] => normal [alarm] => stdClass Object ( [state] => none [severity] => ) [units] => F [datalogEnabled] => 1 ) ) ) ) [layout] => stdClass Object ( [0] => Array ( [0] => entity/0 ) ) [order] => 0 [temperatureOffset] => 0 [snmpInstance] => 1 ) ) [retCode] => 0 [retMsg] => ) 我所需要的就是：
temperature [value] => 62.61但我不知道获取它的语法。
回答 1
Stack Overflow用户
发布于 2018-07-24 04:03:07
$temperature = $json->data->{'1E5410ECC9D90FC3'}->entity->{'0'}->measurement->{0};页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/51486166
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