我正在下载 dropbox-php-sdk。好的接下来，我在php上编写脚本：
<?php
require_once "dropbox-sdk-php-1.1.6/lib/Dropbox/autoload.php";
use \Dropbox as dbx;
$dropbox_config = array(
'key' => 'fasgsasgas',
'secret' => 'gasawggasg'
);
$appInfo = dbx\AppInfo::loadFromJson($dropbox_config);
$webAuth = new dbx\WebAuthNoRedirect($appInfo, "PHP-Example/1.0");
$authorizeUrl = $webAuth->start();
echo "1. Go to: " . $authorizeUrl . "<br>";
echo "2. Click \"Allow\" (you might have to log in first).<br>";
echo "3. Copy the authorization code and insert it into $authCode.<br>";
$authCode = trim('eadasfafasfasfasfffffasfasfsafsafsafsafsafafa');
list($accessToken, $dropboxUserId) = $webAuth->finish($authCode);
echo "Access Token: " . $accessToken . "<br>";
$dbxClient = new dbx\Client($accessToken, "PHP-Example/1.0");
$accountInfo = $dbxClient->getAccountInfo();
print_r($accountInfo);
?>
当我运行这个脚本时，我有输出：
root@iredmail:/var/www/test.tl# php test2.php
PHP Fatal error: Uncaught exception 'Exception' with message 'The Dropbox SDK requires the cURL PHP extension, but it looks like you don't have it (couldn't find function "curl_init"). Library: "/var/www/test.tl/dropbox-sdk-php-1.1.6/lib/Dropbox/RequestUtil.php".' in /var/www/test.tl/dropbox-sdk-php-1.1.6/lib/Dropbox/RequestUtil.php:5
Stack trace:
#0 /var/www/test.tl/dropbox-sdk-php-1.1.6/lib/Dropbox/autoload.php(27): require_once()
#1 [internal function]: Dropbox\autoload('Dropbox\Request...')
#2 /var/www/test.tl/dropbox-sdk-php-1.1.6/lib/Dropbox/WebAuthBase.php(14): spl_autoload_call('Dropbox\Request...')
#3 /var/www/test.tl/dropbox-sdk-php-1.1.6/lib/Dropbox/WebAuthNoRedirect.php(56): Dropbox\WebAuthBase->_getAuthorizeUrl(NULL, NULL)
#4 /var/www/test.tl/test2.php(14): Dropbox\WebAuthNoRedirect->start()
#5 {main}
thrown in /var/www/test.tl/dropbox-sdk-php-1.1.6/lib/Dropbox/RequestUtil.php on line 5
哪里，我有错误？我需要获取帐户信息。但我不明白，我哪里有错误。