获取用户IP -负载平衡器后面的Drupal网站

Drupal有ip_address()函数

function ip_address() {
 $ip_address = &drupal_static(__FUNCTION__);
 if (!isset($ip_address)) {
   $ip_address = $_SERVER['REMOTE_ADDR'];
     if (variable_get('reverse_proxy', 0)) {
       $reverse_proxy_header = variable_get('reverse_proxy_header', 'HTTP_X_FORWARDED_FOR');
       if (!empty($_SERVER[$reverse_proxy_header])) {
         // If an array of known reverse proxy IPs is provided, then trust
         // the XFF header if request really comes from one of them.
         $reverse_proxy_addresses = variable_get('reverse_proxy_addresses', array());
         // Turn XFF header into an array.
         $forwarded = explode(',', $_SERVER[$reverse_proxy_header]);
         // Trim the forwarded IPs; they may have been delimited by commas and spaces.
         $forwarded = array_map('trim', $forwarded);
         // Tack direct client IP onto end of forwarded array.
         $forwarded[] = $ip_address;
         // Eliminate all trusted IPs.
         $untrusted = array_diff($forwarded, $reverse_proxy_addresses);
         // The right-most IP is the most specific we can trust.
         $ip_address = array_pop($untrusted);
       }
     }
   }
 return $ip_address;
}

您确实想要X-Forwarded-For报头，但天真的方法是错误的，因为X-Forwarded-For可以包含多个IP地址，代表路由中的代理。

这是你真正想要的(Ideone):

<?php
// Don't use this function directly to parse arbitrary headers, since it
// assumes that the headers you're passing in are associated with the
// current $_SERVER variable.
function get_client($headers) {
    if (isset($headers['HTTP_X_FORWARDED_FOR'])) {
        return explode(', ', $headers['HTTP_X_FORWARDED_FOR'])[0];
    }
    else {
        return $_SERVER['REMOTE_ADDR'];
    }
}
// You'd want to do this on a server, but not on ideone:
// $headers = getallheaders();
$headers = array('HTTP_X_FORWARDED_FOR' => 'client, proxy1, proxy2');
echo "Client 1: " . get_client($headers) . "'n";
$headers = array('HTTP_X_FORWARDED_FOR' => 'client');
echo "Client 2: " . get_client($headers) . "'n";
// $_SERVER['REMOTE_ADDR'] is blank on ideone but works on servers:
$headers = array();
echo "Client 3: " . get_client($headers) . "'n";
?>

还要注意，X-Forwarded-For很容易被欺骗，所以你不应该只在安全上下文中依赖它。例如，禁止列表的正确方法还需要了解$_SERVER['REMOTE_ADDR'];。

您是否尝试过使用PHP获取IP，如:

if ($_SERVER["HTTP_X_FORWARDED_FOR"]) {
    $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
}
else {
    $ip = $_SERVER["REMOTE_ADDR"];
}