php - Paypal Curl 重定向问题

Question

这是关于通过 Curl 的 Paypal 。我正在尝试使用以下代码访问 Paypal 。该代码在一台服务器上运行良好。将此代码移动到实时服务器后，出现以下错误。谁能告诉我解决方案。

     $API_Endpoint = "https://api-3t.sandbox.paypal.com/nvp";
     $version = urlencode('76.0');
     $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $API_Endpoint);
        curl_setopt($ch, CURLOPT_VERBOSE, 1);

        // Turn off the server and peer verification (TrustManager Concept).
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_POST, 1);

        // Set the API operation, version, and API signature in the request.
        $nvpreq = "METHOD=$methodName_&VERSION=$version&PWD=$API_Password&USER=$API_UserName&SIGNATURE=$API_Signature$nvpStr_";

        // Set the request as a POST FIELD for curl.
        curl_setopt($ch, CURLOPT_POSTFIELDS, $nvpreq);

        // Get response from the server.
        $httpResponse = curl_exec($ch);

错误:

SetExpressCheckout failed: Unknown SSL protocol error in connection to api-3t.sandbox.paypal.com:443 (35)

Answer 1

你能设置curl_setopt($ch, CURLOPT_SSLVERSION, 3);吗？