$reg_user = $_POST["reg_name"];
$reg_pass = $_POST["reg_pass"];
$reg_mail = $_POST["reg_email"];
$reg_ip = @$REMOTE_ADDR;
$query = "INSERT INTO `hydra_users` (reg_id, hydra_name, password, email, IP) VALUES (0, " . $reg_user . ", " . $reg_pass . ", " . $reg_mail . ", " . $reg_ip . "");
mysql_query($query) or die(mysql_error());