Php 未捕获异常'；例外情况'；带有消息'；Dropbox SDK使用64位整数

如何解决此错误的问题？我正在为我的应用程序使用xampp和PHP5.5.6。我的代码如下：

<?php

`enter code here`# Include the Dropbox SDK libraries
require_once "dropbox-php-sdk-1.1.2/lib/Dropbox/autoload.php";
use \Dropbox as dbx;

$appInfo = dbx\AppInfo::loadFromJsonFile("app-info.json");
$webAuth = new dbx\WebAuthNoRedirect($appInfo, "PHP-Example/1.0");

$authorizeUrl = $webAuth->start();

echo "1. Go to: " . $authorizeUrl . "\n";
echo "2. Click \"Allow\" (you might have to log in first).\n";
echo "3. Copy the authorization code.\n";
$authCode = \trim(\readline("Enter the authorization code here: "));

list($accessToken, $dropboxUserId) = $webAuth->finish($authCode);
print "Access Token: " . $accessToken . "\n";

$dbxClient = new dbx\Client($accessToken, "PHP-Example/1.0");
$accountInfo = $dbxClient->getAccountInfo();

print_r($accountInfo);

// uploading files
$f = fopen($_FILES["file"]["name"], "rb");
$result = $dbxClient->uploadFile($_FILES["file"]["name"], dbx\WriteMode::add(), $f);
fclose($f);
print_r($result);`enter code here`
?>

在浏览器上运行脚本时，出现此错误。

自述文件：

要求：

• PHP5.3+

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需要比这更多的细节-你的代码看起来像什么，你尝试过什么等等