Get IP with proxies

gistfile1.php

<?php

  public function getIp()
  {
      if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
          $proxies = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
          $proxies = array_reverse($proxies);
          foreach ($proxies as $proxy) {
              if ($this->isPrivateIp(trim($proxy))) {
                  return $this->isPrivateIp(trim($proxy));
              }
          }
      }
      if (isset($_SERVER['HTTP_X_REAL_IP'])) {
          return $_SERVER['HTTP_X_REAL_IP'];
      }

      return $_SERVER['REMOTE_ADDR'];
  }    
  
  protected function isPrivateIp($ip)
  {
      return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE);
  }