PHP函数在curl_exec命令时失败

Question

我试图从Evergage中提取信息，但根据我的控制台日志调试，该函数终止于curl_exec函数（请参阅注释）。 debug_to_console("success");和curl_error都没有返回任何内容。但是，如果我在debug_to_console("success");之前curl_exec，则会正确返回。当我测试运行该功能时，它运行大约30秒然后结束。我原本以为这是暂停，所以我尝试删除任何时间限制，但它似乎仍然没有工作。任何帮助将不胜感激。谢谢！

function RetrieveData($account, $dataset, $kind, $apiToken)
{

$port = "";
if ($account === "localtest") {
$port = ":8443";
}

$requestURI = "https://" . $account . ".evergage.com" . $port . "/api/dataset/" . $dataset . "/" . $kind . ".json?_at=" . $apiToken;

debug_to_console("request URL: " . $requestURI); 

$session = curl_init();

curl_setopt($session, CURLOPT_FAILONERROR, false);
curl_setopt($session, CURLOPT_RETURNTRANSFER, true);
curl_setopt($session, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($session, CURLOPT_HEADER, true);
curl_setopt($session, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($session, CURLOPT_SSL_VERIFYPEER, false);


$headers = array(
'Accept: application/json',
'Content-Type: application/json',
);


curl_setopt($session, CURLOPT_HTTPHEADER, $headers);
curl_setopt ($session, CURLOPT_CUSTOMREQUEST, "GET");
curl_setopt($session, CURLOPT_URL, $requestURI);

// EVERYTHING RUNS FINE UP TO THIS POINT

set_time_limit(0);
$response = curl_exec($session);

debug_to_console("success");
echo 'Curl error: ' . curl_error($session);

$info = curl_getinfo($session);

$responseCode = $info["http_code"];

if ($responseCode >= 300) {
print("Error loading data: " . $responseCode . "<br/>");
print($response);
} else {
$body = substr($response, $info['header_size']);
$decoded_result = json_decode($body, true);
}

curl_close($session);

return $decoded_result;

}

编辑：我应该提一下，我已打印出$ requestURI，这是正确的。导航到它会产生我需要立即下载的JSON信息。