您需要与 site5 的客户支持联系，以找出他们的服务器无法解析 www.bata.com.sg 的原因
在您得到他们的答复之前，请尝试以下代码。
关键点
- 它连接到 IP 地址 www.bata.com.sg 解析为 - 194.228.50.32
- 然后发送Host: www.bata.com.sg header
本质上，它的工作方式与 Curl 一样，如果它可以解析地址。
<?php
// this is the IP address that www.bata.com.sg resolves to
$server = '194.228.50.32';
$host = 'www.bata.com.sg';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $server);
/* set the user agent - might help, doesn't hurt */
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)');
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
/* try to follow redirects */
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
/* timeout after the specified number of seconds. assuming that this script runs
on a server, 20 seconds should be plenty of time to verify a valid URL. */
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);
curl_setopt($ch, CURLOPT_TIMEOUT, 20);
$headers = array();
$headers[] = "Host: $host";
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_VERBOSE, true);
/* don't download the page, just the header (much faster in this case) */
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_setopt($ch, CURLOPT_HEADER, true);
$response = curl_exec($ch);
curl_close($ch);
var_dump($response);