在 PHP 中將單個 Json 對象轉換為 Json 數組

Question

我正在調用 coincap.io 單個 JSON 對象

{"altCap":282255454377.94916,"bitnodesCount":11508,"btcCap":149160858393,"btcPrice":8830.18849156212,"dom":63.86,"totalCap":431416312770.94904,"volumeAlt":709387849.4057536,"volumeBtc":1253729369.908587,"volumeTotal":1963117219.314342}

我想像數組一樣

[{"altCap":282255454377.94916,"bitnodesCount":11508,"btcCap":149160858393,"btcPrice":8830.18849156212,"dom":63.86,"totalCap":431416312770.94904,"volumeAlt":709387849.4057536,"volumeBtc":1253729369.908587,"volumeTotal":1963117219.314342}]

這是我的主要 php 類

Class Second {
 private function request($url)
     {


         $curl = curl_init();

         curl_setopt_array($curl, array(
             CURLOPT_RETURNTRANSFER => 1,
             CURLOPT_URL => $url,
             CURLOPT_USERAGENT => 'Agent'
         ));

         return curl_exec($curl);

         curl_close($curl);

     }

     public function jsonCache($ctime)
     {
         global $request_type, $purge_cache, $limit_reached, $request_limit;

         $cache_file = dirname(__FILE__) . '/data/global.json';
         $expires    = time() - $ctime;

         if (!file_exists($cache_file))
             die("Cache file is missing: $cache_file");

         if (filectime($cache_file) < $expires || file_get_contents($cache_file) == '' || $purge_cache && intval($_SESSION['views']) <= $request_limit) {

             $query = 'https://coincap.io/global';

             $api_results  = $this->request($query);

             $json_results = $api_results;

             if ($api_results && $json_results)
                 file_put_contents($cache_file, $json_results);


         } else {

             $json_results = file_get_contents($cache_file);
             $request_type = 'JSON';
         }

         return $json_results;
     }

}

?>

知道如何將它放在方括號中嗎？ 已經為數組使用了相同的 PHP 類並且工作正常，但我希望這個單個對象具有用 JSON 文件編寫的方括號

Answer 1

在您的 return 語句中，只需連接括號

return '['.$json_result.']';