Piwik\IP::getNonProxyIpFromHeader PHP Метод

    public static function getNonProxyIpFromHeader($default, $proxyHeaders)
    {
        $proxyIps = array();
        $config = Config::getInstance()->General;
        if (isset($config['proxy_ips'])) {
            $proxyIps = $config['proxy_ips'];
        }
        if (!is_array($proxyIps)) {
            $proxyIps = array();
        }
        $proxyIps[] = $default;
        // examine proxy headers
        foreach ($proxyHeaders as $proxyHeader) {
            if (!empty($_SERVER[$proxyHeader])) {
                // this may be buggy if someone has proxy IPs and proxy host headers configured as
                // `$_SERVER[$proxyHeader]` could be eg $_SERVER['HTTP_X_FORWARDED_HOST'] and
                // include an actual host name, not an IP
                $proxyIp = self::getFirstIpFromList($_SERVER[$proxyHeader], $proxyIps);
                if (strlen($proxyIp) && stripos($proxyIp, 'unknown') === false) {
                    return $proxyIp;
                }
            }
        }
        return $default;
    }

 /**
  * Returns the current host.
  *
  * @param string $default Default value to return if host unknown
  * @param bool $checkTrustedHost Whether to do trusted host check. Should ALWAYS be true,
  *                               except in Controller.
  * @return string eg, `"example.org"` if the current URL is
  *                `"http://example.org/dir1/dir2/index.php?param1=value1&param2=value2"`
  * @api
  */
 public static function getCurrentHost($default = 'unknown', $checkTrustedHost = true)
 {
     $hostHeaders = array();
     $config = Config::getInstance()->General;
     if (isset($config['proxy_host_headers'])) {
         $hostHeaders = $config['proxy_host_headers'];
     }
     if (!is_array($hostHeaders)) {
         $hostHeaders = array();
     }
     $host = self::getHost($checkTrustedHost);
     $default = Common::sanitizeInputValue($host ? $host : $default);
     return IP::getNonProxyIpFromHeader($default, $hostHeaders);
 }