get IP

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;
}