PHP : Get IP

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function getRealIpAddr()
{
  if (!empty($_SERVER['HTTP_CLIENT_IP']))
  //check ip from share internet
  {
    $ip=$_SERVER['HTTP_CLIENT_IP'];
  }
  elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))
  //to check ip is pass from proxy
  {
    $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
  }
  else
  {
    $ip=$_SERVER['REMOTE_ADDR'];
  }
  return $ip;
}