PHP，如何使用标头和正文重定向/转发HTTP请求？

如果您有权访问 Apache 服务器配置，则可以使用以下设置创建虚拟主机：

ProxyPreserveHost Off
ProxyPass / http://remotesite.domain.tld/
ProxyPassReverse / http://remotesite.domain.tld/
ProxyPassReverseCookieDomain remotesite.domain.tld proxysite.tld

您需要为此启用mod_proxy和mod_proxy_http。将 remotesite.domain.tld 替换为您转发到的站点，将 proxysite.tld 替换为转发器。

如果您无权访问服务器配置文件，您仍然可以在php中执行此操作，方法是手动设置curl并转发所有内容。

<?php

error_reporting(E_ALL);
ini_set('display_errors', '1');

/* Set it true for debugging. */
$logHeaders = FALSE;

/* Site to forward requests to.  */
$site = 'http://remotesite.domain.tld/';

/* Domains to use when rewriting some headers. */
$remoteDomain = 'remotesite.domain.tld';
$proxyDomain = 'proxysite.tld';

$request = $_SERVER['REQUEST_URI'];

$ch = curl_init();

/* If there was a POST request, then forward that as well.*/
if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
    curl_setopt($ch, CURLOPT_POST, TRUE);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $_POST);
}
curl_setopt($ch, CURLOPT_URL, $site . $request);
curl_setopt($ch, CURLOPT_HEADER, TRUE);

$headers = getallheaders();

/* Translate some headers to make the remote party think we actually browsing that site. */
$extraHeaders = array();
if (isset($headers['Referer'])) 
{
    $extraHeaders[] = 'Referer: '. str_replace($proxyDomain, $remoteDomain, $headers['Referer']);
}
if (isset($headers['Origin'])) 
{
    $extraHeaders[] = 'Origin: '. str_replace($proxyDomain, $remoteDomain, $headers['Origin']);
}

/* Forward cookie as it came.  */
curl_setopt($ch, CURLOPT_HTTPHEADER, $extraHeaders);
if (isset($headers['Cookie']))
{
    curl_setopt($ch, CURLOPT_COOKIE, $headers['Cookie']);
}
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

if ($logHeaders)
{
    $f = fopen("headers.txt", "a");
    curl_setopt($ch, CURLOPT_VERBOSE, TRUE);
    curl_setopt($ch, CURLOPT_STDERR, $f);
}

curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$response = curl_exec($ch);

$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
$headers = substr($response, 0, $header_size);
$body = substr($response, $header_size);

$headerArray = explode(PHP_EOL, $headers);

/* Process response headers. */
foreach($headerArray as $header)
{
    $colonPos = strpos($header, ':');
    if ($colonPos !== FALSE) 
    {
        $headerName = substr($header, 0, $colonPos);
        
        /* Ignore content headers, let the webserver decide how to deal with the content. */
        if (trim($headerName) == 'Content-Encoding') continue;
        if (trim($headerName) == 'Content-Length') continue;
        if (trim($headerName) == 'Transfer-Encoding') continue;
        if (trim($headerName) == 'Location') continue;
        /* -- */
        /* Change cookie domain for the proxy */
        if (trim($headerName) == 'Set-Cookie')
        {
            $header = str_replace('domain='.$remoteDomain, 'domain='.$proxyDomain, $header);
        }
        /* -- */
        
    }
    header($header, FALSE);
}

echo $body;

if ($logHeaders)
{
    fclose($f);
}
curl_close($ch);

?>

编辑：

当然，脚本必须位于（子）域的根目录中。你应该有一个.htaccess来重写所有内容：

RewriteEngine On
RewriteRule .* index.php

这是我找到的解决方案（可能有更好的）

 public static function getResponse ($url,$headers,$body)
    {
        $params = '?' . http_build_query($headers);

        $redirect_url = $url . $params;

        $ch = curl_init($redirect_url);

        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $response = curl_exec($ch);

        if (!isset($response))
            return null;
        return $response;
    }