<?php
$ch = curl_init();
 
curl_setopt($ch, CURLOPT_URL, "https://api-3t.sandbox.paypal.com/nvp");
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_SSLVERSION, 3);
 
curl_exec($ch);
echo PHP_EOL.curl_errno($ch).PHP_EOL;
echo curl_error($ch).PHP_EOL;
 
curl_close($ch);