function getIp(){
if( isset( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ){
$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
}elseif( isset( $_SERVER['HTTP_VIA'] ) ){
$ip = $_SERVER['HTTP_VIA'];
}elseif( isset( $_SERVER['REMOTE_ADDR'] ) ){
$ip = $_SERVER['REMOTE_ADDR'];
}else{
$ip = "Unknown" ;
}
return $ip;
Then just check them against your ip and then forward it.