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<?php 

   function getIP()
   {
      $ipaddress = '';
      if(      getenv('HTTP_CLIENT_IP')         )  $ipaddress = getenv('HTTP_CLIENT_IP'      );
      else if( getenv('HTTP_X_FORWARDED_FOR')   )  $ipaddress = getenv('HTTP_X_FORWARDED_FOR');
      else if( getenv('HTTP_X_FORWARDED')       )  $ipaddress = getenv('HTTP_X_FORWARDED'    );
      else if( getenv('HTTP_FORWARDED_FOR')     )  $ipaddress = getenv('HTTP_FORWARDED_FOR'  );
      else if( getenv('HTTP_FORWARDED')         )  $ipaddress = getenv('HTTP_FORWARDED'      );
      else if( getenv('REMOTE_ADDR')            )  $ipaddress = getenv('REMOTE_ADDR'         );
      return $ipaddress;
   }