curl正在阻止，这意味着：

curl is blocking, which means that:

$result = json_decode($ret,true);

foreach ($result['data'] as $key => $value)
{
      //process data from $result
}

将不会执行：

$ret = curl_exec($curl);

完成。您可以使用curl_error（）和使用curl_getinfo（）检查HTTP响应代码来检查错误和其他问题。

is complete. You can check for errors and other issues using curl_error() and by checking the HTTP response code with curl_getinfo().