使用CDN加速后对PHP获取IP的影响

yanglu — Fri, 16 Apr 2010 03:30:38 +0000

一直都是使用DISCUZ的获取客户端IP的函数，但今日发现网站使用CDN加速后，网站统计出了问题，获取到的IP有部分是CDN节点的IP，而程序统计是以唯一IP判断，导致统计到的IP比实际IP少很多。改动获取IP的函数后恢复正常。
原获取IP的方法：

if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {
$onlineip = getenv('HTTP_CLIENT_IP');
} elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {
$onlineip = getenv('HTTP_X_FORWARDED_FOR');
} elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {
$onlineip = getenv('REMOTE_ADDR');
} elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {
$onlineip = $_SERVER['REMOTE_ADDR'];
}
 
preg_match("/[\d\.]{7,15}/", $onlineip, $onlineipmatches);
$onlineip = $onlineipmatches[0] ? $onlineipmatches[0] : 'unknown';
unset($onlineipmatches);

改成如下：

function get_real_ip()
{
       $ip=false;
       if(!empty($_SERVER["HTTP_CLIENT_IP"]))
       {
            $ip = $_SERVER["HTTP_CLIENT_IP"];
       }
       if (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))
       {
            $ips = explode (", ", $_SERVER['HTTP_X_FORWARDED_FOR']);
            if ($ip)
            {
                     array_unshift($ips, $ip); $ip = FALSE;
            }
            for ($i = 0; $i < count($ips); $i++)
            {
                     if (!eregi ("^(10|172\.16|192\.168)\.", $ips[$i]))
                     {
                               $ip = $ips[$i];
                               break;
                     }
            }
       }
       return ($ip ? $ip : $_SERVER['REMOTE_ADDR']);
}
$onlineip = get_real_ip();

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DZ获取客户端IP的方法

yanglu — Fri, 30 Oct 2009 07:40:37 +0000

discuzs是一款不错的php开源社区软件，很多优秀的代码可以拿来借鉴。下面是从common.inc.php中提取出来的获取客户端IP的代码。

if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {
	$onlineip = getenv('HTTP_CLIENT_IP');
} elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {
	$onlineip = getenv('HTTP_X_FORWARDED_FOR');
} elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {
	$onlineip = getenv('REMOTE_ADDR');
} elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {
	$onlineip = $_SERVER['REMOTE_ADDR'];
}

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翱翔白鹭ip

使用CDN加速后对PHP获取IP的影响

DZ获取客户端IP的方法