Test curl connection

curl_test.php

<?php
$_h = curl_init(); 
curl_setopt($_h, CURLOPT_HEADER, 1); 
curl_setopt($_h, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt($_h, CURLOPT_HTTPGET, 1);
curl_setopt($_h, CURLOPT_FOLLOWLOCATION, true); 
curl_setopt($_h, CURLOPT_URL, 'TESTING_URL' ); // Change TESTING_URL on url that you want to test.
curl_setopt($_h, CURLOPT_DNS_USE_GLOBAL_CACHE, false ); 
curl_setopt($_h, CURLOPT_DNS_CACHE_TIMEOUT, 2 ); 
var_dump(curl_exec($_h)); 
var_dump(curl_getinfo($_h)); 
var_dump(curl_error($_h));